COVER INFORMATION Station: DEFFORD (Code De ) Experiment: Resolving a gravitationally lensed dual back-hole system at z = 2.37 Exp. Code: em153a Schedule Version: 2.00 Processed by SCHED version: 11.60 Release 11.6; April 2020 PI: John McKean Address: ASTRON Postbus 2 7990 AA, Dwingeloo the Netherlands Phone: +31 521 595 780 EMAIL: mckean@astron.nl Fax: +31 521 595 101 Phone during observation: +31 624 328 991 Observing mode: 18cm 1024-8-2 Notes: Schedule for DEFFORD (Code De ) Page 2 Resolving a gravitationally lensed dual back-hole system at z = 2.37 UP: D => Below limits; H => Below horizon mask; W => still slewing at end; blank => Up. Early: Seconds between end of slew and start. Dwell: On source seconds. Disk: GBytes recorded to this point. TPStart: Recording start time. Frequencies are LO sum (band edge). SYNC: Time correlator is expected to sync up. ---------------------------------------------------------------------------------------- Start UT Source Start / Stop Early Disk TPStart Stop UT LST EL AZ HA UP ParA Dwell GBytes SYNC ---------------------------------------------------------------------------------------- --- Fri 28 May 2021 Day 148 --- Next scan frequencies: 1626.49 1626.49 Next BBC frequencies: 645.51 645.51 Next scan bandwidths: 64.00 64.00 19 30 00 J1639+8631 11 47 40 53.1 5.5 -4.8 -104.1 0 0 19 30 00 19 31 30 =1654+866 11 49 10 53.1 5.5 -4.7 -104.5 90 6 19 30 01 19 31 30 PSJ1721+8842 11 49 10 52.3 2.1 -5.2 -99.7 -31 6 No stop 19 34 55 --- 11 52 35 52.4 2.1 -5.2 -100.6 174 19 19 31 31 19 35 40 J1639+8631 11 53 21 53.2 5.5 -4.7 -105.5 14 19 19 35 40 19 37 05 =1654+866 11 54 46 53.2 5.5 -4.6 -105.9 85 24 19 35 41 19 37 05 PSJ1721+8842 11 54 46 52.4 2.1 -5.1 -101.1 -31 24 No stop 19 40 30 --- 11 58 11 52.4 2.1 -5.1 -102.0 174 38 19 37 06 19 40 30 J1639+8631 11 58 11 53.2 5.5 -4.6 -106.8 -31 38 No stop 19 42 00 =1654+866 11 59 42 53.3 5.5 -4.6 -107.2 59 43 19 40 31 19 42 00 PSJ1721+8842 11 59 42 52.4 2.1 -5.1 -102.3 -31 43 No stop 19 45 25 --- 12 03 07 52.4 2.1 -5.0 -103.2 174 57 19 42 01 19 46 10 J1639+8631 12 03 52 53.3 5.4 -4.5 -108.2 14 57 19 46 10 19 47 35 =1654+866 12 05 18 53.3 5.4 -4.5 -108.6 85 62 19 46 11 19 47 35 PSJ1721+8842 12 05 18 52.4 2.1 -5.0 -103.8 -31 62 No stop 19 51 00 --- 12 08 43 52.5 2.1 -4.9 -104.6 174 75 19 47 36 19 51 00 J1639+8631 12 08 43 53.4 5.4 -4.4 -109.5 -31 75 No stop 19 52 30 =1654+866 12 10 13 53.4 5.4 -4.4 -109.8 59 81 19 51 01 19 52 30 PSJ1721+8842 12 10 13 52.5 2.1 -4.9 -105.0 -31 81 No stop 19 55 55 --- 12 13 39 52.5 2.1 -4.8 -105.9 174 94 19 52 31 19 56 40 J1639+8631 12 14 24 53.5 5.3 -4.3 -110.9 14 94 19 56 40 19 58 05 =1654+866 12 15 49 53.5 5.3 -4.3 -111.3 85 100 19 56 41 19 58 05 PSJ1721+8842 12 15 49 52.5 2.1 -4.8 -106.4 -31 100 No stop 20 01 30 --- 12 19 15 52.5 2.1 -4.7 -107.3 174 113 19 58 06 20 01 30 J1639+8631 12 19 15 53.5 5.3 -4.2 -112.2 -30 113 No stop 20 03 00 =1654+866 12 20 45 53.6 5.3 -4.2 -112.6 60 119 20 01 31 20 03 00 PSJ1721+8842 12 20 45 52.5 2.0 -4.7 -107.7 -30 119 No stop 20 06 25 --- 12 24 11 52.5 2.0 -4.7 -108.5 175 132 20 03 01 Schedule for DEFFORD (Code De ) Page 3 Resolving a gravitationally lensed dual back-hole system at z = 2.37 UP: D => Below limits; H => Below horizon mask; W => still slewing at end; blank => Up. Early: Seconds between end of slew and start. Dwell: On source seconds. Disk: GBytes recorded to this point. TPStart: Recording start time. Frequencies are LO sum (band edge). SYNC: Time correlator is expected to sync up. ---------------------------------------------------------------------------------------- Start UT Source Start / Stop Early Disk TPStart Stop UT LST EL AZ HA UP ParA Dwell GBytes SYNC ---------------------------------------------------------------------------------------- --- Fri 28 May 2021 Day 148 --- 20 07 10 J1639+8631 12 24 56 53.6 5.2 -4.1 -113.6 15 132 20 07 10 20 08 35 =1654+866 12 26 21 53.6 5.2 -4.1 -114.0 85 138 20 07 11 20 08 35 PSJ1721+8842 12 26 21 52.5 2.0 -4.6 -109.1 -30 138 No stop 20 12 00 --- 12 29 47 52.6 2.0 -4.6 -109.9 175 151 20 08 36 20 12 00 J1639+8631 12 29 47 53.7 5.2 -4.1 -114.9 -30 151 No stop 20 13 30 =1654+866 12 31 17 53.7 5.2 -4.0 -115.3 60 157 20 12 01 20 13 30 PSJ1721+8842 12 31 17 52.6 2.0 -4.5 -110.3 -30 157 No stop 20 16 55 --- 12 34 42 52.6 2.0 -4.5 -111.2 175 170 20 13 31 20 17 40 J1639+8631 12 35 28 53.8 5.1 -4.0 -116.4 15 170 20 17 40 20 19 05 =1654+866 12 36 53 53.8 5.1 -3.9 -116.7 85 175 20 17 41 20 19 05 PSJ1721+8842 12 36 53 52.6 2.0 -4.4 -111.7 -30 175 No stop 20 22 30 --- 12 40 18 52.6 2.0 -4.4 -112.6 175 188 20 19 06 20 22 30 J1639+8631 12 40 18 53.8 5.1 -3.9 -117.6 -30 188 No stop 20 24 00 =1654+866 12 41 49 53.9 5.1 -3.9 -118.0 60 194 20 22 31 20 24 00 PSJ1721+8842 12 41 49 52.6 2.0 -4.4 -113.0 -30 194 No stop 20 27 25 --- 12 45 14 52.7 2.0 -4.3 -113.8 175 207 20 24 01 20 28 10 J1639+8631 12 45 59 53.9 5.0 -3.8 -119.1 15 207 20 28 10 20 29 35 =1654+866 12 47 24 53.9 5.0 -3.8 -119.5 85 213 20 28 11 20 29 35 PSJ1721+8842 12 47 24 52.7 2.0 -4.3 -114.4 -30 213 No stop 20 33 00 --- 12 50 50 52.7 1.9 -4.2 -115.3 175 226 20 29 36 20 33 00 J1639+8631 12 50 50 54.0 4.9 -3.7 -120.3 -29 226 No stop 20 34 30 =1654+866 12 52 20 54.0 4.9 -3.7 -120.7 61 232 20 33 01 20 34 30 PSJ1721+8842 12 52 20 52.7 1.9 -4.2 -115.6 -29 232 No stop 20 37 55 --- 12 55 46 52.7 1.9 -4.1 -116.5 176 245 20 34 31 20 38 40 J1639+8631 12 56 31 54.1 4.9 -3.6 -121.8 16 245 20 38 40 20 40 05 =1654+866 12 57 56 54.1 4.8 -3.6 -122.2 85 251 20 38 41 20 40 05 PSJ1721+8842 12 57 56 52.7 1.9 -4.1 -117.1 -29 251 No stop 20 43 30 --- 13 01 22 52.7 1.9 -4.0 -117.9 176 264 20 40 06 20 43 30 J1639+8631 13 01 22 54.1 4.8 -3.5 -123.1 -29 264 No stop 20 45 00 =1654+866 13 02 52 54.1 4.8 -3.5 -123.5 61 270 20 43 31 Schedule for DEFFORD (Code De ) Page 4 Resolving a gravitationally lensed dual back-hole system at z = 2.37 UP: D => Below limits; H => Below horizon mask; W => still slewing at end; blank => Up. Early: Seconds between end of slew and start. Dwell: On source seconds. Disk: GBytes recorded to this point. TPStart: Recording start time. Frequencies are LO sum (band edge). SYNC: Time correlator is expected to sync up. ---------------------------------------------------------------------------------------- Start UT Source Start / Stop Early Disk TPStart Stop UT LST EL AZ HA UP ParA Dwell GBytes SYNC ---------------------------------------------------------------------------------------- --- Fri 28 May 2021 Day 148 --- 20 45 00 PSJ1721+8842 13 02 52 52.7 1.9 -4.0 -118.3 -29 270 No stop 20 48 25 --- 13 06 18 52.8 1.9 -4.0 -119.2 176 283 20 45 01 20 49 10 J1639+8631 13 07 03 54.2 4.7 -3.4 -124.6 16 283 20 49 10 20 50 35 =1654+866 13 08 28 54.2 4.7 -3.4 -124.9 85 288 20 49 11 20 50 35 PSJ1721+8842 13 08 28 52.8 1.9 -3.9 -119.7 -29 288 No stop 20 54 00 --- 13 11 53 52.8 1.8 -3.9 -120.6 176 301 20 50 36 20 54 00 J1639+8631 13 11 53 54.2 4.6 -3.4 -125.8 -28 301 No stop 20 55 30 =1654+866 13 13 24 54.3 4.6 -3.3 -126.2 62 307 20 54 01 21 00 30 3C345 13 18 25 53.1 88.7 -3.4 -53.0 25 307 21 00 30 21 05 30 --- 13 23 25 53.9 89.6 -3.3 -53.1 300 327 21 00 31 21 10 30 J1639+8631 13 28 26 54.4 4.4 -3.1 -130.2 21 327 21 10 30 21 15 30 =1654+866 13 33 27 54.5 4.3 -3.0 -131.5 300 346 21 10 31 21 15 30 PSJ1721+8842 13 33 27 52.9 1.7 -3.5 -126.1 -27 346 No stop 21 18 55 --- 13 36 53 52.9 1.7 -3.4 -126.9 178 359 21 15 31 21 19 40 J1639+8631 13 37 38 54.6 4.2 -2.9 -132.6 18 359 21 19 40 21 21 05 =1654+866 13 39 03 54.6 4.2 -2.9 -133.0 85 365 21 19 41 21 21 05 PSJ1721+8842 13 39 03 52.9 1.7 -3.4 -127.5 -27 365 No stop 21 24 30 --- 13 42 28 52.9 1.7 -3.4 -128.4 178 378 21 21 06 21 24 30 J1639+8631 13 42 28 54.6 4.1 -2.9 -133.9 -27 378 No stop 21 26 00 =1654+866 13 43 59 54.6 4.1 -2.8 -134.3 63 384 21 24 31 21 26 00 PSJ1721+8842 13 43 59 52.9 1.7 -3.3 -128.7 -27 384 No stop 21 29 25 --- 13 47 24 53.0 1.7 -3.3 -129.6 178 397 21 26 01 21 30 10 J1639+8631 13 48 09 54.7 4.0 -2.8 -135.4 19 397 21 30 10 21 31 35 =1654+866 13 49 35 54.7 4.0 -2.7 -135.8 85 402 21 30 11 21 31 35 PSJ1721+8842 13 49 35 53.0 1.6 -3.2 -130.2 -26 402 No stop 21 35 00 --- 13 53 00 53.0 1.6 -3.2 -131.0 179 415 21 31 36 21 35 00 J1639+8631 13 53 00 54.7 3.9 -2.7 -136.7 -26 415 No stop 21 36 30 =1654+866 13 54 30 54.7 3.9 -2.7 -137.1 64 421 21 35 01 21 36 30 PSJ1721+8842 13 54 30 53.0 1.6 -3.2 -131.4 -26 421 No stop 21 39 55 --- 13 57 56 53.0 1.6 -3.1 -132.3 179 434 21 36 31 Schedule for DEFFORD (Code De ) Page 5 Resolving a gravitationally lensed dual back-hole system at z = 2.37 UP: D => Below limits; H => Below horizon mask; W => still slewing at end; blank => Up. Early: Seconds between end of slew and start. Dwell: On source seconds. Disk: GBytes recorded to this point. TPStart: Recording start time. Frequencies are LO sum (band edge). SYNC: Time correlator is expected to sync up. ---------------------------------------------------------------------------------------- Start UT Source Start / Stop Early Disk TPStart Stop UT LST EL AZ HA UP ParA Dwell GBytes SYNC ---------------------------------------------------------------------------------------- --- Fri 28 May 2021 Day 148 --- 21 40 40 J1639+8631 13 58 41 54.8 3.8 -2.6 -138.2 19 434 21 40 40 21 42 05 =1654+866 14 00 06 54.8 3.8 -2.6 -138.6 85 440 21 40 41 21 42 05 PSJ1721+8842 14 00 06 53.0 1.6 -3.1 -132.9 -26 440 No stop 21 45 30 --- 14 03 32 53.0 1.6 -3.0 -133.7 179 453 21 42 06 21 45 30 J1639+8631 14 03 32 54.8 3.7 -2.5 -139.5 -25 453 No stop 21 47 00 =1654+866 14 05 02 54.8 3.7 -2.5 -139.9 65 459 21 45 31 21 47 00 PSJ1721+8842 14 05 02 53.0 1.5 -3.0 -134.1 -25 459 No stop 21 50 25 --- 14 08 28 53.0 1.5 -2.9 -135.0 180 472 21 47 01 21 51 10 J1639+8631 14 09 13 54.9 3.6 -2.4 -141.0 20 472 21 51 10 21 52 35 =1654+866 14 10 38 54.9 3.6 -2.4 -141.4 85 478 21 51 11 21 52 35 PSJ1721+8842 14 10 38 53.1 1.5 -2.9 -135.5 -25 478 No stop 21 56 00 --- 14 14 04 53.1 1.5 -2.8 -136.4 180 491 21 52 36 21 56 00 J1639+8631 14 14 04 54.9 3.5 -2.3 -142.3 -24 491 No stop 21 57 30 =1654+866 14 15 34 54.9 3.5 -2.3 -142.7 66 497 21 56 01 21 57 30 PSJ1721+8842 14 15 34 53.1 1.5 -2.8 -136.8 -24 497 No stop 22 00 55 --- 14 18 59 53.1 1.4 -2.7 -137.7 181 510 21 57 31 22 01 40 J1639+8631 14 19 45 55.0 3.4 -2.2 -143.8 21 510 22 01 40 22 03 05 =1654+866 14 21 10 55.0 3.3 -2.2 -144.2 85 515 22 01 41 22 03 05 PSJ1721+8842 14 21 10 53.1 1.4 -2.7 -138.2 -24 515 No stop 22 06 30 --- 14 24 35 53.1 1.4 -2.7 -139.1 181 528 22 03 06 22 06 30 J1639+8631 14 24 35 55.0 3.3 -2.2 -145.1 -24 528 No stop 22 08 00 =1654+866 14 26 06 55.0 3.2 -2.1 -145.5 66 534 22 06 31 22 08 00 PSJ1721+8842 14 26 06 53.1 1.4 -2.6 -139.5 -24 534 No stop 22 11 25 --- 14 29 31 53.1 1.4 -2.6 -140.4 181 547 22 08 01 22 12 10 J1639+8631 14 30 16 55.1 3.1 -2.1 -146.6 21 547 22 12 10 22 13 35 =1654+866 14 31 42 55.1 3.1 -2.0 -147.0 85 553 22 12 11 22 13 35 PSJ1721+8842 14 31 42 53.1 1.4 -2.5 -140.9 -24 553 No stop 22 17 00 --- 14 35 07 53.1 1.3 -2.5 -141.8 181 566 22 13 36 22 17 00 J1639+8631 14 35 07 55.1 3.0 -2.0 -147.9 -24 566 No stop 22 18 30 =1654+866 14 36 37 55.1 3.0 -2.0 -148.3 66 572 22 17 01 Schedule for DEFFORD (Code De ) Page 6 Resolving a gravitationally lensed dual back-hole system at z = 2.37 UP: D => Below limits; H => Below horizon mask; W => still slewing at end; blank => Up. Early: Seconds between end of slew and start. Dwell: On source seconds. Disk: GBytes recorded to this point. TPStart: Recording start time. Frequencies are LO sum (band edge). SYNC: Time correlator is expected to sync up. ---------------------------------------------------------------------------------------- Start UT Source Start / Stop Early Disk TPStart Stop UT LST EL AZ HA UP ParA Dwell GBytes SYNC ---------------------------------------------------------------------------------------- --- Fri 28 May 2021 Day 148 --- 22 18 30 PSJ1721+8842 14 36 37 53.2 1.3 -2.5 -142.2 -24 572 No stop 22 21 55 --- 14 40 03 53.2 1.3 -2.4 -143.1 181 585 22 18 31 22 22 40 J1639+8631 14 40 48 55.2 2.9 -1.9 -149.4 21 585 22 22 40 22 24 05 =1654+866 14 42 13 55.2 2.9 -1.9 -149.8 85 591 22 22 41 22 24 05 PSJ1721+8842 14 42 13 53.2 1.3 -2.4 -143.6 -24 591 No stop 22 27 30 --- 14 45 39 53.2 1.2 -2.3 -144.5 181 604 22 24 06 22 27 30 J1639+8631 14 45 39 55.2 2.8 -1.8 -150.7 -24 604 No stop 22 29 00 =1654+866 14 47 09 55.2 2.8 -1.8 -151.1 66 610 22 27 31 22 29 00 PSJ1721+8842 14 47 09 53.2 1.2 -2.3 -144.9 -24 610 No stop 22 32 25 --- 14 50 35 53.2 1.2 -2.2 -145.8 181 623 22 29 01 22 33 10 J1639+8631 14 51 20 55.2 2.7 -1.7 -152.3 20 623 22 33 10 22 34 35 =1654+866 14 52 45 55.2 2.6 -1.7 -152.6 85 628 22 33 11 22 34 35 PSJ1721+8842 14 52 45 53.2 1.2 -2.2 -146.3 -25 628 No stop 22 38 00 --- 14 56 11 53.2 1.2 -2.1 -147.2 180 642 22 34 36 22 38 00 J1639+8631 14 56 11 55.3 2.5 -1.6 -153.6 -25 642 No stop 22 39 30 =1654+866 14 57 41 55.3 2.5 -1.6 -154.0 65 647 22 38 01 22 39 30 PSJ1721+8842 14 57 41 53.2 1.2 -2.1 -147.6 -25 647 No stop 22 42 55 --- 15 01 06 53.2 1.1 -2.0 -148.5 180 661 22 39 31 22 43 40 J1639+8631 15 01 51 55.3 2.4 -1.5 -155.1 20 661 22 43 40 22 45 05 =1654+866 15 03 17 55.3 2.4 -1.5 -155.5 85 666 22 43 41 22 45 05 PSJ1721+8842 15 03 17 53.2 1.1 -2.0 -149.0 -25 666 No stop 22 48 30 --- 15 06 42 53.2 1.1 -1.9 -149.9 180 679 22 45 06 22 48 30 J1639+8631 15 06 42 55.3 2.3 -1.4 -156.4 -25 679 No stop 22 50 00 =1654+866 15 08 13 55.4 2.2 -1.4 -156.8 65 685 22 48 31 22 50 00 PSJ1721+8842 15 08 13 53.3 1.1 -1.9 -150.3 -25 685 No stop 22 53 25 --- 15 11 38 53.3 1.0 -1.9 -151.2 180 698 22 50 01 22 54 10 J1639+8631 15 12 23 55.4 2.1 -1.4 -157.9 20 698 22 54 10 22 55 35 =1654+866 15 13 48 55.4 2.1 -1.3 -158.3 85 704 22 54 11 22 55 35 PSJ1721+8842 15 13 48 53.3 1.0 -1.8 -151.7 -25 704 No stop 22 59 00 --- 15 17 14 53.3 1.0 -1.8 -152.6 180 717 22 55 36 Schedule for DEFFORD (Code De ) Page 7 Resolving a gravitationally lensed dual back-hole system at z = 2.37 UP: D => Below limits; H => Below horizon mask; W => still slewing at end; blank => Up. Early: Seconds between end of slew and start. Dwell: On source seconds. Disk: GBytes recorded to this point. TPStart: Recording start time. Frequencies are LO sum (band edge). SYNC: Time correlator is expected to sync up. ---------------------------------------------------------------------------------------- Start UT Source Start / Stop Early Disk TPStart Stop UT LST EL AZ HA UP ParA Dwell GBytes SYNC ---------------------------------------------------------------------------------------- --- Fri 28 May 2021 Day 148 --- 22 59 00 J1639+8631 15 17 14 55.4 2.0 -1.3 -159.3 -25 717 No stop 23 00 30 =1654+866 15 18 44 55.4 2.0 -1.2 -159.7 65 723 22 59 01 23 00 30 PSJ1721+8842 15 18 44 53.3 1.0 -1.7 -153.0 -25 723 No stop 23 03 55 --- 15 22 10 53.3 0.9 -1.7 -153.9 180 736 23 00 31 23 04 40 J1639+8631 15 22 55 55.4 1.9 -1.2 -160.8 20 736 23 04 40 23 06 05 =1654+866 15 24 20 55.4 1.8 -1.2 -161.2 85 741 23 04 41 23 06 05 PSJ1721+8842 15 24 20 53.3 0.9 -1.7 -154.4 -25 741 No stop 23 09 30 --- 15 27 46 53.3 0.9 -1.6 -155.3 180 755 23 06 06 23 09 30 J1639+8631 15 27 46 55.5 1.8 -1.1 -162.1 -25 755 No stop 23 11 00 =1654+866 15 29 16 55.5 1.7 -1.1 -162.5 65 760 23 09 31 23 11 00 PSJ1721+8842 15 29 16 53.3 0.9 -1.6 -155.7 -25 760 No stop 23 14 25 --- 15 32 42 53.3 0.9 -1.5 -156.6 180 774 23 11 01 23 15 10 J1639+8631 15 33 27 55.5 1.6 -1.0 -163.6 20 774 23 15 10 23 16 35 =1654+866 15 34 52 55.5 1.6 -1.0 -164.0 85 779 23 15 11 23 16 35 PSJ1721+8842 15 34 52 53.3 0.8 -1.5 -157.1 -25 779 No stop 23 20 00 --- 15 38 17 53.3 0.8 -1.4 -158.0 180 792 23 16 36 23 20 00 J1639+8631 15 38 17 55.5 1.5 -0.9 -165.0 -25 792 No stop 23 21 30 =1654+866 15 39 48 55.5 1.4 -0.9 -165.4 65 798 23 20 01 23 21 30 PSJ1721+8842 15 39 48 53.3 0.8 -1.4 -158.4 -25 798 No stop 23 24 55 --- 15 43 13 53.3 0.8 -1.3 -159.3 180 811 23 21 31 23 25 40 J1639+8631 15 43 58 55.5 1.3 -0.8 -166.5 20 811 23 25 40 23 27 05 =1654+866 15 45 24 55.5 1.3 -0.8 -166.9 85 817 23 25 41 23 27 05 PSJ1721+8842 15 45 24 53.3 0.7 -1.3 -159.8 -25 817 No stop 23 30 30 --- 15 48 49 53.3 0.7 -1.2 -160.7 180 830 23 27 06 23 30 30 J1639+8631 15 48 49 55.5 1.2 -0.7 -167.8 -25 830 No stop 23 32 00 =1654+866 15 50 19 55.5 1.2 -0.7 -168.2 65 836 23 30 31 23 32 00 PSJ1721+8842 15 50 19 53.4 0.7 -1.2 -161.1 -25 836 No stop 23 35 25 --- 15 53 45 53.4 0.7 -1.2 -162.0 180 849 23 32 01 23 36 10 J1639+8631 15 54 30 55.6 1.1 -0.7 -169.4 20 849 23 36 10 23 37 35 =1654+866 15 55 55 55.6 1.0 -0.6 -169.7 85 854 23 36 11 Schedule for DEFFORD (Code De ) Page 8 Resolving a gravitationally lensed dual back-hole system at z = 2.37 UP: D => Below limits; H => Below horizon mask; W => still slewing at end; blank => Up. Early: Seconds between end of slew and start. Dwell: On source seconds. Disk: GBytes recorded to this point. TPStart: Recording start time. Frequencies are LO sum (band edge). SYNC: Time correlator is expected to sync up. ---------------------------------------------------------------------------------------- Start UT Source Start / Stop Early Disk TPStart Stop UT LST EL AZ HA UP ParA Dwell GBytes SYNC ---------------------------------------------------------------------------------------- --- Fri 28 May 2021 Day 148 --- 23 37 35 PSJ1721+8842 15 55 55 53.4 0.6 -1.1 -162.6 -25 854 No stop 23 41 00 --- 15 59 21 53.4 0.6 -1.1 -163.4 180 868 23 37 36 23 41 00 J1639+8631 15 59 21 55.6 0.9 -0.6 -170.7 -25 868 No stop 23 42 30 =1654+866 16 00 51 55.6 0.9 -0.5 -171.1 65 873 23 41 01 23 42 30 PSJ1721+8842 16 00 51 53.4 0.6 -1.0 -163.8 -25 873 No stop 23 45 55 --- 16 04 17 53.4 0.6 -1.0 -164.7 180 887 23 42 31 23 46 40 J1639+8631 16 05 02 55.6 0.8 -0.5 -172.2 20 887 23 46 40 23 48 05 =1654+866 16 06 27 55.6 0.7 -0.5 -172.6 85 892 23 46 41 23 48 05 PSJ1721+8842 16 06 27 53.4 0.5 -1.0 -165.3 -25 892 No stop 23 51 30 --- 16 09 53 53.4 0.5 -0.9 -166.1 180 905 23 48 06 23 51 30 J1639+8631 16 09 53 55.6 0.6 -0.4 -173.5 -25 905 No stop 23 53 00 =1654+866 16 11 23 55.6 0.6 -0.4 -173.9 65 911 23 51 31 23 53 00 PSJ1721+8842 16 11 23 53.4 0.5 -0.9 -166.5 -25 911 No stop 23 56 25 --- 16 14 48 53.4 0.5 -0.8 -167.4 180 924 23 53 01 23 57 10 J1639+8631 16 15 34 55.6 0.5 -0.3 -175.1 19 924 23 57 10 23 58 35 =1654+866 16 16 59 55.6 0.5 -0.3 -175.5 85 930 23 57 11 --- Start: Fri 28 May 2021 Day 148 -- Stop: Sat 29 May 2021 Day 149 --- 23 58 35 PSJ1721+8842 16 16 59 53.4 0.4 -0.8 -168.0 -25 930 No stop 00 02 00 --- 16 20 24 53.4 0.4 -0.7 -168.9 180 943 23 58 36 00 02 00 J1639+8631 16 20 24 55.6 0.4 -0.2 -176.4 -26 943 No stop 00 03 30 =1654+866 16 21 55 55.6 0.3 -0.2 -176.8 64 949 00 02 01 00 03 30 PSJ1721+8842 16 21 55 53.4 0.4 -0.7 -169.2 -25 949 No stop 00 06 55 --- 16 25 20 53.4 0.4 -0.6 -170.1 180 962 00 03 31 00 07 40 J1639+8631 16 26 05 55.6 0.2 -0.1 -177.9 20 962 00 07 40 00 09 05 =1654+866 16 27 31 55.6 0.2 -0.1 -178.3 85 967 00 07 41 00 09 05 PSJ1721+8842 16 27 31 53.4 0.3 -0.6 -170.7 -25 967 No stop 00 12 30 --- 16 30 56 53.4 0.3 -0.5 -171.6 180 981 00 09 06 00 12 30 J1639+8631 16 30 56 55.6 0.1 -0.0 -179.3 -25 981 No stop 00 14 00 =1654+866 16 32 26 55.6 0.0 -0.0 -179.7 65 986 00 12 31 Schedule for DEFFORD (Code De ) Page 9 Resolving a gravitationally lensed dual back-hole system at z = 2.37 UP: D => Below limits; H => Below horizon mask; W => still slewing at end; blank => Up. Early: Seconds between end of slew and start. Dwell: On source seconds. Disk: GBytes recorded to this point. TPStart: Recording start time. Frequencies are LO sum (band edge). SYNC: Time correlator is expected to sync up. ---------------------------------------------------------------------------------------- Start UT Source Start / Stop Early Disk TPStart Stop UT LST EL AZ HA UP ParA Dwell GBytes SYNC ---------------------------------------------------------------------------------------- --- Sat 29 May 2021 Day 149 --- 00 14 00 PSJ1721+8842 16 32 26 53.4 0.3 -0.5 -172.0 -25 986 No stop 00 17 25 --- 16 35 52 53.4 0.3 -0.5 -172.8 180 1000 00 14 01 00 18 10 J1639+8631 16 36 37 55.6 -0.1 0.0 179.2 20 1000 00 18 10 00 19 35 =1654+866 16 38 02 55.6 -0.1 0.1 178.8 85 1005 00 18 11 00 19 35 PSJ1721+8842 16 38 02 53.4 0.2 -0.4 -173.4 -25 1005 No stop 00 23 00 --- 16 41 28 53.4 0.2 -0.4 -174.3 180 1018 00 19 36 00 23 00 J1639+8631 16 41 28 55.6 -0.2 0.1 177.9 -25 1018 No stop 00 24 30 =1654+866 16 42 58 55.6 -0.3 0.2 177.5 65 1024 00 23 01 00 24 30 PSJ1721+8842 16 42 58 53.4 0.2 -0.3 -174.7 -25 1024 No stop 00 27 55 --- 16 46 24 53.4 0.2 -0.3 -175.6 180 1037 00 24 31 00 28 40 J1639+8631 16 47 09 55.6 -0.4 0.2 176.3 20 1037 00 28 40 00 30 05 =1654+866 16 48 34 55.6 -0.4 0.2 176.0 85 1043 00 28 41 00 30 05 PSJ1721+8842 16 48 34 53.4 0.1 -0.3 -176.1 -25 1043 No stop 00 33 30 --- 16 52 00 53.4 0.1 -0.2 -177.0 180 1056 00 30 06 00 33 30 J1639+8631 16 52 00 55.6 -0.5 0.3 175.0 -25 1056 No stop 00 35 00 =1654+866 16 53 30 55.6 -0.5 0.3 174.6 65 1062 00 33 31 00 35 00 PSJ1721+8842 16 53 30 53.4 0.1 -0.2 -177.4 -25 1062 No stop 00 38 25 --- 16 56 55 53.4 0.1 -0.1 -178.3 180 1075 00 35 01 00 39 10 J1639+8631 16 57 40 55.6 -0.6 0.4 173.5 20 1075 00 39 10 00 40 35 =1654+866 16 59 06 55.6 -0.7 0.4 173.1 85 1080 00 39 11 00 40 35 PSJ1721+8842 16 59 06 53.4 0.0 -0.1 -178.8 -25 1080 No stop 00 44 00 --- 17 02 31 53.4 0.0 -0.0 -179.7 180 1094 00 40 36 00 44 00 J1639+8631 17 02 31 55.6 -0.8 0.5 172.2 -25 1094 No stop 00 45 30 =1654+866 17 04 02 55.6 -0.8 0.5 171.8 65 1099 00 44 01 00 45 30 PSJ1721+8842 17 04 02 53.4 -0.0 0.0 179.9 -25 1099 No stop 00 48 55 --- 17 07 27 53.4 -0.0 0.1 179.0 180 1113 00 45 31 00 49 40 J1639+8631 17 08 12 55.6 -0.9 0.6 170.6 20 1113 00 49 40 00 51 05 =1654+866 17 09 37 55.6 -1.0 0.6 170.2 85 1118 00 49 41 00 51 05 PSJ1721+8842 17 09 37 53.4 -0.1 0.1 178.5 -25 1118 No stop 00 54 30 --- 17 13 03 53.4 -0.1 0.2 177.6 180 1131 00 51 06 Schedule for DEFFORD (Code De ) Page 10 Resolving a gravitationally lensed dual back-hole system at z = 2.37 UP: D => Below limits; H => Below horizon mask; W => still slewing at end; blank => Up. Early: Seconds between end of slew and start. Dwell: On source seconds. Disk: GBytes recorded to this point. TPStart: Recording start time. Frequencies are LO sum (band edge). SYNC: Time correlator is expected to sync up. ---------------------------------------------------------------------------------------- Start UT Source Start / Stop Early Disk TPStart Stop UT LST EL AZ HA UP ParA Dwell GBytes SYNC ---------------------------------------------------------------------------------------- --- Sat 29 May 2021 Day 149 --- 00 54 30 J1639+8631 17 13 03 55.6 -1.1 0.7 169.3 -25 1131 No stop 00 56 00 =1654+866 17 14 33 55.6 -1.1 0.7 168.9 65 1137 00 54 31 00 56 00 PSJ1721+8842 17 14 33 53.4 -0.1 0.2 177.2 -25 1137 No stop 00 59 25 --- 17 17 59 53.4 -0.1 0.2 176.3 180 1150 00 56 01 01 00 10 J1639+8631 17 18 44 55.5 -1.2 0.8 167.8 20 1150 01 00 10 01 01 35 =1654+866 17 20 09 55.5 -1.2 0.8 167.4 85 1156 01 00 11 01 01 35 PSJ1721+8842 17 20 09 53.4 -0.2 0.3 175.8 -25 1156 No stop 01 05 00 --- 17 23 35 53.4 -0.2 0.3 174.9 180 1169 01 01 36 01 05 00 J1639+8631 17 23 35 55.5 -1.3 0.8 166.4 -25 1169 No stop 01 06 30 =1654+866 17 25 05 55.5 -1.4 0.9 166.0 65 1175 01 05 01 01 06 30 PSJ1721+8842 17 25 05 53.4 -0.2 0.4 174.5 -25 1175 No stop 01 09 55 --- 17 28 31 53.4 -0.2 0.4 173.6 180 1188 01 06 31 01 10 40 J1639+8631 17 29 16 55.5 -1.5 0.9 164.9 20 1188 01 10 40 01 12 05 =1654+866 17 30 41 55.5 -1.5 0.9 164.5 85 1194 01 10 41 01 12 05 PSJ1721+8842 17 30 41 53.4 -0.3 0.5 173.0 -25 1194 No stop 01 15 30 --- 17 34 06 53.4 -0.3 0.5 172.2 180 1207 01 12 06 01 15 30 J1639+8631 17 34 06 55.5 -1.6 1.0 163.6 -25 1207 No stop 01 17 00 =1654+866 17 35 37 55.5 -1.7 1.0 163.2 65 1213 01 15 31 01 17 00 PSJ1721+8842 17 35 37 53.4 -0.3 0.5 171.8 -25 1213 No stop 01 20 25 --- 17 39 02 53.4 -0.3 0.6 170.9 180 1226 01 17 01 01 21 10 J1639+8631 17 39 47 55.5 -1.8 1.1 162.1 20 1226 01 21 10 01 22 35 =1654+866 17 41 13 55.4 -1.8 1.1 161.7 85 1231 01 21 11 01 22 35 PSJ1721+8842 17 41 13 53.4 -0.4 0.6 170.3 -25 1231 No stop 01 26 00 --- 17 44 38 53.4 -0.4 0.7 169.4 180 1244 01 22 36 01 26 00 J1639+8631 17 44 38 55.4 -1.9 1.2 160.7 -25 1244 No stop 01 27 30 =1654+866 17 46 08 55.4 -1.9 1.2 160.3 65 1250 01 26 01 01 32 30 3C454.3 17 51 09 21.3 90.7 -5.1 -39.8 -1 1250 01 32 30 01 37 30 --- 17 56 10 22.1 91.7 -5.0 -39.8 299 1270 01 32 31 01 42 30 J1639+8631 18 01 11 55.3 -2.3 1.5 156.3 -5 1270 01 42 30 01 47 30 =1654+866 18 06 12 55.3 -2.4 1.5 154.9 295 1289 01 42 31 Schedule for DEFFORD (Code De ) Page 11 Resolving a gravitationally lensed dual back-hole system at z = 2.37 UP: D => Below limits; H => Below horizon mask; W => still slewing at end; blank => Up. Early: Seconds between end of slew and start. Dwell: On source seconds. Disk: GBytes recorded to this point. TPStart: Recording start time. Frequencies are LO sum (band edge). SYNC: Time correlator is expected to sync up. ---------------------------------------------------------------------------------------- Start UT Source Start / Stop Early Disk TPStart Stop UT LST EL AZ HA UP ParA Dwell GBytes SYNC ---------------------------------------------------------------------------------------- --- Sat 29 May 2021 Day 149 --- 01 47 30 PSJ1721+8842 18 06 12 53.4 -0.6 1.0 163.9 -24 1289 No stop 01 50 55 --- 18 09 37 53.4 -0.6 1.1 163.0 181 1302 01 47 31 01 51 40 J1639+8631 18 10 22 55.3 -2.5 1.6 153.8 21 1302 01 51 40 01 53 05 =1654+866 18 11 48 55.3 -2.6 1.6 153.4 85 1308 01 51 41 01 53 05 PSJ1721+8842 18 11 48 53.4 -0.6 1.1 162.5 -24 1308 No stop 01 56 30 --- 18 15 13 53.4 -0.7 1.2 161.6 181 1321 01 53 06 01 56 30 J1639+8631 18 15 13 55.2 -2.6 1.7 152.5 -24 1321 No stop 01 58 00 =1654+866 18 16 43 55.2 -2.7 1.7 152.1 66 1327 01 56 31 01 58 00 PSJ1721+8842 18 16 43 53.4 -0.7 1.2 161.2 -24 1327 No stop 02 01 25 --- 18 20 09 53.3 -0.7 1.3 160.3 181 1340 01 58 01 02 02 10 J1639+8631 18 20 54 55.2 -2.8 1.8 151.0 20 1340 02 02 10 02 03 35 =1654+866 18 22 19 55.2 -2.8 1.8 150.6 85 1345 02 02 11 02 03 35 PSJ1721+8842 18 22 19 53.3 -0.7 1.3 159.7 -25 1345 No stop 02 07 00 --- 18 25 45 53.3 -0.8 1.4 158.9 180 1358 02 03 36 02 07 00 J1639+8631 18 25 45 55.2 -2.9 1.9 149.7 -25 1358 No stop 02 08 30 =1654+866 18 27 15 55.2 -2.9 1.9 149.3 65 1364 02 07 01 02 08 30 PSJ1721+8842 18 27 15 53.3 -0.8 1.4 158.5 -25 1364 No stop 02 11 55 --- 18 30 41 53.3 -0.8 1.5 157.6 180 1377 02 08 31 02 12 40 J1639+8631 18 31 26 55.1 -3.0 2.0 148.1 20 1377 02 12 40 02 14 05 =1654+866 18 32 51 55.1 -3.0 2.0 147.8 85 1383 02 12 41 02 14 05 PSJ1721+8842 18 32 51 53.3 -0.8 1.5 157.0 -25 1383 No stop 02 17 30 --- 18 36 17 53.3 -0.9 1.5 156.2 180 1396 02 14 06 02 17 30 J1639+8631 18 36 17 55.1 -3.1 2.0 146.8 -26 1396 No stop 02 19 00 =1654+866 18 37 47 55.1 -3.2 2.1 146.4 64 1402 02 17 31 02 19 00 PSJ1721+8842 18 37 47 53.3 -0.9 1.6 155.8 -26 1402 No stop 02 22 25 --- 18 41 12 53.3 -0.9 1.6 154.9 179 1415 02 19 01 02 23 10 J1639+8631 18 41 58 55.0 -3.3 2.1 145.3 19 1415 02 23 10 02 24 35 =1654+866 18 43 23 55.0 -3.3 2.2 144.9 85 1421 02 23 11 02 24 35 PSJ1721+8842 18 43 23 53.3 -0.9 1.7 154.3 -26 1421 No stop 02 28 00 --- 18 46 48 53.3 -1.0 1.7 153.4 179 1434 02 24 36 Schedule for DEFFORD (Code De ) Page 12 Resolving a gravitationally lensed dual back-hole system at z = 2.37 UP: D => Below limits; H => Below horizon mask; W => still slewing at end; blank => Up. Early: Seconds between end of slew and start. Dwell: On source seconds. Disk: GBytes recorded to this point. TPStart: Recording start time. Frequencies are LO sum (band edge). SYNC: Time correlator is expected to sync up. ---------------------------------------------------------------------------------------- Start UT Source Start / Stop Early Disk TPStart Stop UT LST EL AZ HA UP ParA Dwell GBytes SYNC ---------------------------------------------------------------------------------------- --- Sat 29 May 2021 Day 149 --- 02 28 00 J1639+8631 18 46 48 55.0 -3.4 2.2 144.0 -27 1434 No stop 02 29 30 =1654+866 18 48 19 55.0 -3.4 2.2 143.6 63 1440 02 28 01 02 29 30 PSJ1721+8842 18 48 19 53.3 -1.0 1.7 153.1 -27 1440 No stop 02 32 55 --- 18 51 44 53.3 -1.0 1.8 152.2 178 1453 02 29 31 02 33 40 J1639+8631 18 52 29 54.9 -3.5 2.3 142.5 18 1453 02 33 40 02 35 05 =1654+866 18 53 55 54.9 -3.5 2.3 142.1 85 1458 02 33 41 02 35 05 PSJ1721+8842 18 53 55 53.3 -1.0 1.8 151.6 -27 1458 No stop 02 38 30 --- 18 57 20 53.3 -1.0 1.9 150.7 178 1471 02 35 06 02 38 30 J1639+8631 18 57 20 54.9 -3.6 2.4 141.2 -27 1471 No stop 02 40 00 =1654+866 18 58 50 54.9 -3.6 2.4 140.8 63 1477 02 38 31 02 40 00 PSJ1721+8842 18 58 50 53.3 -1.1 1.9 150.4 -27 1477 No stop 02 43 25 --- 19 02 16 53.2 -1.1 2.0 149.5 178 1490 02 40 01 02 44 10 J1639+8631 19 03 01 54.8 -3.7 2.5 139.7 18 1490 02 44 10 02 45 35 =1654+866 19 04 26 54.8 -3.7 2.5 139.3 85 1496 02 44 11 02 45 35 PSJ1721+8842 19 04 26 53.2 -1.1 2.0 148.9 -28 1496 No stop 02 49 00 --- 19 07 52 53.2 -1.1 2.1 148.0 177 1509 02 45 36 02 49 00 J1639+8631 19 07 52 54.8 -3.8 2.6 138.4 -28 1509 No stop 02 50 30 =1654+866 19 09 22 54.8 -3.8 2.6 138.0 62 1515 02 49 01 02 50 30 PSJ1721+8842 19 09 22 53.2 -1.1 2.1 147.7 -28 1515 No stop 02 53 55 --- 19 12 48 53.2 -1.2 2.2 146.8 177 1528 02 50 31 02 54 40 J1639+8631 19 13 33 54.7 -3.9 2.7 136.9 17 1528 02 54 40 02 56 05 =1654+866 19 14 58 54.7 -3.9 2.7 136.5 85 1534 02 54 41 02 56 05 PSJ1721+8842 19 14 58 53.2 -1.2 2.2 146.2 -28 1534 No stop 02 59 30 --- 19 18 24 53.2 -1.2 2.2 145.3 177 1547 02 56 06 02 59 30 J1639+8631 19 18 24 54.7 -4.0 2.7 135.6 -28 1547 No stop 03 01 00 =1654+866 19 19 54 54.7 -4.0 2.8 135.2 62 1553 02 59 31 03 01 00 PSJ1721+8842 19 19 54 53.2 -1.2 2.3 145.0 -28 1553 No stop 03 04 25 --- 19 23 19 53.2 -1.3 2.3 144.1 177 1566 03 01 01 03 05 10 J1639+8631 19 24 04 54.6 -4.1 2.8 134.1 16 1566 03 05 10 03 06 35 =1654+866 19 25 30 54.6 -4.1 2.9 133.7 85 1571 03 05 11 Schedule for DEFFORD (Code De ) Page 13 Resolving a gravitationally lensed dual back-hole system at z = 2.37 UP: D => Below limits; H => Below horizon mask; W => still slewing at end; blank => Up. Early: Seconds between end of slew and start. Dwell: On source seconds. Disk: GBytes recorded to this point. TPStart: Recording start time. Frequencies are LO sum (band edge). SYNC: Time correlator is expected to sync up. ---------------------------------------------------------------------------------------- Start UT Source Start / Stop Early Disk TPStart Stop UT LST EL AZ HA UP ParA Dwell GBytes SYNC ---------------------------------------------------------------------------------------- --- Sat 29 May 2021 Day 149 --- 03 06 35 PSJ1721+8842 19 25 30 53.2 -1.3 2.4 143.5 -29 1571 No stop 03 10 00 --- 19 28 55 53.2 -1.3 2.4 142.6 176 1584 03 06 36 03 10 00 J1639+8631 19 28 55 54.6 -4.2 2.9 132.8 -29 1584 No stop 03 11 30 =1654+866 19 30 25 54.5 -4.2 2.9 132.4 61 1590 03 10 01 03 11 30 PSJ1721+8842 19 30 25 53.2 -1.3 2.4 142.3 -29 1590 No stop 03 14 55 --- 19 33 51 53.1 -1.3 2.5 141.4 176 1603 03 11 31 03 15 40 J1639+8631 19 34 36 54.5 -4.3 3.0 131.3 16 1603 03 15 40 03 17 05 =1654+866 19 36 01 54.5 -4.3 3.0 131.0 85 1609 03 15 41 03 17 05 PSJ1721+8842 19 36 01 53.1 -1.4 2.5 140.8 -29 1609 No stop 03 20 30 --- 19 39 27 53.1 -1.4 2.6 140.0 176 1622 03 17 06 03 20 30 J1639+8631 19 39 27 54.4 -4.4 3.1 130.1 -29 1622 No stop 03 22 00 =1654+866 19 40 57 54.4 -4.4 3.1 129.7 61 1628 03 20 31 03 22 00 PSJ1721+8842 19 40 57 53.1 -1.4 2.6 139.6 -29 1628 No stop 03 25 25 --- 19 44 23 53.1 -1.4 2.7 138.7 176 1641 03 22 01 03 26 10 J1639+8631 19 45 08 54.4 -4.5 3.2 128.6 15 1641 03 26 10 03 27 35 =1654+866 19 46 33 54.4 -4.5 3.2 128.2 85 1647 03 26 11 03 27 35 PSJ1721+8842 19 46 33 53.1 -1.4 2.7 138.1 -30 1647 No stop 03 31 00 --- 19 49 59 53.1 -1.5 2.8 137.3 175 1660 03 27 36 03 31 00 J1639+8631 19 49 59 54.3 -4.5 3.3 127.3 -30 1660 No stop 03 32 30 =1654+866 19 51 29 54.3 -4.6 3.3 126.9 60 1666 03 31 01 03 32 30 PSJ1721+8842 19 51 29 53.1 -1.5 2.8 136.9 -30 1666 No stop 03 35 55 --- 19 54 54 53.1 -1.5 2.9 136.0 175 1679 03 32 31 03 36 40 J1639+8631 19 55 40 54.2 -4.6 3.4 125.8 15 1679 03 36 40 03 38 05 =1654+866 19 57 05 54.2 -4.7 3.4 125.4 85 1684 03 36 41 03 38 05 PSJ1721+8842 19 57 05 53.1 -1.5 2.9 135.4 -30 1684 No stop 03 41 30 --- 20 00 30 53.0 -1.5 2.9 134.6 175 1698 03 38 06 03 41 30 J1639+8631 20 00 30 54.2 -4.7 3.4 124.5 -30 1698 No stop 03 43 00 =1654+866 20 02 01 54.2 -4.7 3.5 124.1 60 1703 03 41 31 03 43 00 PSJ1721+8842 20 02 01 53.0 -1.5 3.0 134.2 -30 1703 No stop 03 46 25 --- 20 05 26 53.0 -1.6 3.0 133.3 175 1717 03 43 01 Schedule for DEFFORD (Code De ) Page 14 Resolving a gravitationally lensed dual back-hole system at z = 2.37 UP: D => Below limits; H => Below horizon mask; W => still slewing at end; blank => Up. Early: Seconds between end of slew and start. Dwell: On source seconds. Disk: GBytes recorded to this point. TPStart: Recording start time. Frequencies are LO sum (band edge). SYNC: Time correlator is expected to sync up. ---------------------------------------------------------------------------------------- Start UT Source Start / Stop Early Disk TPStart Stop UT LST EL AZ HA UP ParA Dwell GBytes SYNC ---------------------------------------------------------------------------------------- --- Sat 29 May 2021 Day 149 --- 03 47 10 J1639+8631 20 06 11 54.1 -4.8 3.5 123.0 15 1717 03 47 10 03 48 35 =1654+866 20 07 37 54.1 -4.8 3.6 122.7 85 1722 03 47 11 03 48 35 PSJ1721+8842 20 07 37 53.0 -1.6 3.1 132.8 -30 1722 No stop 03 52 00 --- 20 11 02 53.0 -1.6 3.1 131.9 175 1735 03 48 36 03 52 00 J1639+8631 20 11 02 54.1 -4.9 3.6 121.8 -31 1735 No stop 03 53 30 =1654+866 20 12 32 54.0 -4.9 3.6 121.4 59 1741 03 52 01 03 53 30 PSJ1721+8842 20 12 32 53.0 -1.6 3.1 131.5 -31 1741 No stop 03 56 55 --- 20 15 58 53.0 -1.6 3.2 130.6 174 1754 03 53 31 03 57 40 J1639+8631 20 16 43 54.0 -4.9 3.7 120.3 14 1754 03 57 40 03 59 05 =1654+866 20 18 08 54.0 -5.0 3.7 119.9 85 1760 03 57 41 03 59 05 PSJ1721+8842 20 18 08 53.0 -1.6 3.2 130.1 -31 1760 No stop 04 02 30 --- 20 21 34 52.9 -1.7 3.3 129.2 174 1773 03 59 06 04 02 30 J1639+8631 20 21 34 53.9 -5.0 3.8 119.0 -31 1773 No stop 04 04 00 =1654+866 20 23 04 53.9 -5.0 3.8 118.6 59 1779 04 02 31 04 04 00 PSJ1721+8842 20 23 04 52.9 -1.7 3.3 128.8 -31 1779 No stop 04 07 25 --- 20 26 30 52.9 -1.7 3.4 127.9 174 1792 04 04 01 04 08 10 J1639+8631 20 27 15 53.8 -5.1 3.9 117.6 14 1792 04 08 10 04 09 35 =1654+866 20 28 40 53.8 -5.1 3.9 117.2 85 1797 04 08 11 04 09 35 PSJ1721+8842 20 28 40 52.9 -1.7 3.4 127.4 -31 1797 No stop 04 13 00 --- 20 32 06 52.9 -1.7 3.5 126.5 174 1811 04 09 36 04 13 00 J1639+8631 20 32 06 53.8 -5.1 4.0 116.3 -31 1811 No stop 04 14 30 =1654+866 20 33 36 53.7 -5.1 4.0 115.9 59 1816 04 13 01 04 14 30 PSJ1721+8842 20 33 36 52.9 -1.7 3.5 126.1 -31 1816 No stop 04 17 55 --- 20 37 01 52.9 -1.8 3.6 125.3 174 1830 04 14 31 04 18 40 J1639+8631 20 37 47 53.7 -5.2 4.1 114.8 14 1830 04 18 40 04 20 05 =1654+866 20 39 12 53.7 -5.2 4.1 114.5 85 1835 04 18 41 04 20 05 PSJ1721+8842 20 39 12 52.9 -1.8 3.6 124.7 -31 1835 No stop 04 23 30 --- 20 42 37 52.8 -1.8 3.6 123.8 174 1848 04 20 06 04 23 30 J1639+8631 20 42 37 53.6 -5.2 4.1 113.6 -31 1848 No stop 04 25 00 =1654+866 20 44 08 53.6 -5.3 4.2 113.2 59 1854 04 23 31 Schedule for DEFFORD (Code De ) Page 15 Resolving a gravitationally lensed dual back-hole system at z = 2.37 UP: D => Below limits; H => Below horizon mask; W => still slewing at end; blank => Up. Early: Seconds between end of slew and start. Dwell: On source seconds. Disk: GBytes recorded to this point. TPStart: Recording start time. Frequencies are LO sum (band edge). SYNC: Time correlator is expected to sync up. ---------------------------------------------------------------------------------------- Start UT Source Start / Stop Early Disk TPStart Stop UT LST EL AZ HA UP ParA Dwell GBytes SYNC ---------------------------------------------------------------------------------------- --- Sat 29 May 2021 Day 149 --- 04 25 00 PSJ1721+8842 20 44 08 52.8 -1.8 3.7 123.5 -31 1854 No stop 04 28 25 --- 20 47 33 52.8 -1.8 3.7 122.6 174 1867 04 25 01 04 29 10 J1639+8631 20 48 18 53.5 -5.3 4.2 112.1 13 1867 04 29 10 04 30 35 =1654+866 20 49 43 53.5 -5.3 4.3 111.8 85 1873 04 29 11 04 30 35 PSJ1721+8842 20 49 43 52.8 -1.8 3.8 122.0 -32 1873 No stop 04 34 00 --- 20 53 09 52.8 -1.8 3.8 121.2 173 1886 04 30 36 04 34 00 J1639+8631 20 53 09 53.5 -5.3 4.3 110.9 -32 1886 No stop 04 35 30 =1654+866 20 54 39 53.5 -5.4 4.3 110.5 58 1892 04 34 01 04 35 30 PSJ1721+8842 20 54 39 52.8 -1.8 3.8 120.8 -32 1892 No stop 04 38 55 --- 20 58 05 52.8 -1.9 3.9 119.9 173 1905 04 35 31 04 39 40 J1639+8631 20 58 50 53.4 -5.4 4.4 109.4 13 1905 04 39 40 04 41 05 =1654+866 21 00 15 53.4 -5.4 4.4 109.1 85 1910 04 39 41 04 41 05 PSJ1721+8842 21 00 15 52.8 -1.9 3.9 119.4 -32 1910 No stop 04 44 30 --- 21 03 41 52.7 -1.9 4.0 118.5 173 1924 04 41 06 04 44 30 J1639+8631 21 03 41 53.3 -5.4 4.5 108.2 -32 1924 No stop 04 46 00 =1654+866 21 05 11 53.3 -5.4 4.5 107.8 58 1929 04 44 31 04 46 00 PSJ1721+8842 21 05 11 52.7 -1.9 4.0 118.1 -32 1929 No stop 04 49 25 --- 21 08 37 52.7 -1.9 4.1 117.2 173 1943 04 46 01 04 50 10 J1639+8631 21 09 22 53.2 -5.5 4.6 106.7 13 1943 04 50 10 04 51 35 =1654+866 21 10 47 53.2 -5.5 4.6 106.4 85 1948 04 50 11 04 51 35 PSJ1721+8842 21 10 47 52.7 -1.9 4.1 116.7 -32 1948 No stop 04 55 00 --- 21 14 12 52.7 -1.9 4.2 115.8 173 1961 04 51 36 04 55 00 J1639+8631 21 14 12 53.2 -5.5 4.7 105.5 -32 1961 No stop 04 56 30 =1654+866 21 15 43 53.1 -5.5 4.7 105.1 58 1967 04 55 01 04 56 30 PSJ1721+8842 21 15 43 52.7 -1.9 4.2 115.5 -32 1967 No stop 04 59 55 --- 21 19 08 52.7 -2.0 4.3 114.6 173 1980 04 56 31 05 00 40 J1639+8631 21 19 53 53.1 -5.6 4.8 104.0 13 1980 05 00 40 05 02 05 =1654+866 21 21 19 53.1 -5.6 4.8 103.7 85 1986 05 00 41 05 02 05 PSJ1721+8842 21 21 19 52.7 -2.0 4.3 114.0 -32 1986 No stop 05 05 30 --- 21 24 44 52.6 -2.0 4.4 113.2 173 1999 05 02 06 Schedule for DEFFORD (Code De ) Page 16 Resolving a gravitationally lensed dual back-hole system at z = 2.37 UP: D => Below limits; H => Below horizon mask; W => still slewing at end; blank => Up. Early: Seconds between end of slew and start. Dwell: On source seconds. Disk: GBytes recorded to this point. TPStart: Recording start time. Frequencies are LO sum (band edge). SYNC: Time correlator is expected to sync up. ---------------------------------------------------------------------------------------- Start UT Source Start / Stop Early Disk TPStart Stop UT LST EL AZ HA UP ParA Dwell GBytes SYNC ---------------------------------------------------------------------------------------- --- Sat 29 May 2021 Day 149 --- 05 05 30 J1639+8631 21 24 44 53.0 -5.6 4.9 102.8 -32 1999 No stop 05 07 00 =1654+866 21 26 14 53.0 -5.6 4.9 102.4 58 2005 05 05 31 05 07 00 PSJ1721+8842 21 26 14 52.6 -2.0 4.4 112.8 -32 2005 No stop 05 10 25 --- 21 29 40 52.6 -2.0 4.4 111.9 173 2018 05 07 01 05 11 10 J1639+8631 21 30 25 52.9 -5.6 4.9 101.4 13 2018 05 11 10 05 12 35 =1654+866 21 31 50 52.9 -5.6 5.0 101.0 85 2023 05 11 11 05 12 35 PSJ1721+8842 21 31 50 52.6 -2.0 4.5 111.4 -32 2023 No stop 05 16 00 --- 21 35 16 52.6 -2.0 4.5 110.5 173 2037 05 12 36 05 16 00 J1639+8631 21 35 16 52.9 -5.6 5.0 100.1 -32 2037 No stop 05 17 30 =1654+866 21 36 46 52.8 -5.6 5.1 99.8 58 2042 05 16 01 05 17 30 PSJ1721+8842 21 36 46 52.6 -2.0 4.6 110.1 -32 2042 No stop 05 20 55 --- 21 40 12 52.6 -2.0 4.6 109.3 173 2056 05 17 31 05 21 40 J1639+8631 21 40 57 52.8 -5.7 5.1 98.7 13 2056 05 21 40 05 23 05 =1654+866 21 42 22 52.7 -5.7 5.1 98.3 85 2061 05 21 41 05 23 05 PSJ1721+8842 21 42 22 52.5 -2.0 4.6 108.7 -32 2061 No stop 05 26 30 --- 21 45 48 52.5 -2.0 4.7 107.8 173 2074 05 23 06 05 26 30 J1639+8631 21 45 48 52.7 -5.7 5.2 97.5 -32 2074 No stop 05 28 00 =1654+866 21 47 18 52.7 -5.7 5.2 97.1 58 2080 05 26 31 05 28 00 PSJ1721+8842 21 47 18 52.5 -2.0 4.7 107.5 -32 2080 No stop 05 31 25 --- 21 50 43 52.5 -2.1 4.8 106.6 173 2093 05 28 01 05 32 10 J1639+8631 21 51 29 52.6 -5.7 5.3 96.0 13 2093 05 32 10 05 33 35 =1654+866 21 52 54 52.6 -5.7 5.3 95.7 85 2099 05 32 11 05 33 35 PSJ1721+8842 21 52 54 52.5 -2.1 4.8 106.1 -32 2099 No stop 05 37 00 --- 21 56 19 52.5 -2.1 4.9 105.2 173 2112 05 33 36 05 37 00 J1639+8631 21 56 19 52.5 -5.7 5.4 94.8 -32 2112 No stop 05 38 30 =1654+866 21 57 50 52.5 -5.7 5.4 94.4 58 2118 05 37 01 05 43 30 3C84 22 02 50 37.4 67.7 -5.3 -49.5 57 2118 05 43 30 05 48 30 --- 22 07 51 38.1 68.5 -5.2 -49.8 300 2137 05 43 31 05 53 30 J1639+8631 22 12 52 52.3 -5.7 5.7 90.7 54 2137 05 53 30 05 58 30 =1654+866 22 17 53 52.2 -5.7 5.7 89.4 300 2156 05 53 31 Schedule for DEFFORD (Code De ) Page 17 Resolving a gravitationally lensed dual back-hole system at z = 2.37 UP: D => Below limits; H => Below horizon mask; W => still slewing at end; blank => Up. Early: Seconds between end of slew and start. Dwell: On source seconds. Disk: GBytes recorded to this point. TPStart: Recording start time. Frequencies are LO sum (band edge). SYNC: Time correlator is expected to sync up. ---------------------------------------------------------------------------------------- Start UT Source Start / Stop Early Disk TPStart Stop UT LST EL AZ HA UP ParA Dwell GBytes SYNC ---------------------------------------------------------------------------------------- --- Sat 29 May 2021 Day 149 --- 05 58 30 PSJ1721+8842 22 17 53 52.3 -2.1 5.2 99.8 -32 2156 No stop 06 01 55 --- 22 21 18 52.3 -2.1 5.3 98.9 173 2170 05 58 31 06 02 40 J1639+8631 22 22 04 52.1 -5.7 5.8 88.4 13 2170 06 02 40 06 04 05 =1654+866 22 23 29 52.1 -5.7 5.8 88.0 85 2175 06 02 41 06 04 05 PSJ1721+8842 22 23 29 52.3 -2.1 5.3 98.4 -32 2175 No stop 06 07 30 --- 22 26 54 52.3 -2.1 5.4 97.5 173 2188 06 04 06 06 07 30 J1639+8631 22 26 54 52.1 -5.7 5.9 87.2 -32 2188 No stop 06 09 00 =1654+866 22 28 25 52.0 -5.7 5.9 86.8 58 2194 06 07 31 06 09 00 PSJ1721+8842 22 28 25 52.3 -2.1 5.4 97.1 -32 2194 No stop 06 12 25 --- 22 31 50 52.3 -2.1 5.5 96.3 173 2207 06 09 01 06 13 10 J1639+8631 22 32 35 52.0 -5.7 6.0 85.8 13 2207 06 13 10 06 14 35 =1654+866 22 34 01 52.0 -5.7 6.0 85.4 85 2213 06 13 11 06 14 35 PSJ1721+8842 22 34 01 52.3 -2.1 5.5 95.7 -32 2213 No stop 06 18 00 --- 22 37 26 52.2 -2.1 5.6 94.9 173 2226 06 14 36 06 18 00 J1639+8631 22 37 26 51.9 -5.7 6.1 84.6 -32 2226 No stop 06 19 30 =1654+866 22 38 56 51.9 -5.7 6.1 84.2 58 2232 06 18 01 06 19 30 PSJ1721+8842 22 38 56 52.2 -2.1 5.6 94.5 -32 2232 No stop 06 22 55 --- 22 42 22 52.2 -2.1 5.6 93.6 173 2245 06 19 31 06 23 40 J1639+8631 22 43 07 51.8 -5.7 6.2 83.2 13 2245 06 23 40 06 25 05 =1654+866 22 44 32 51.8 -5.7 6.2 82.8 85 2250 06 23 41 06 25 05 PSJ1721+8842 22 44 32 52.2 -2.1 5.7 93.1 -32 2250 No stop 06 28 30 --- 22 47 58 52.2 -2.1 5.7 92.2 173 2264 06 25 06 06 28 30 J1639+8631 22 47 58 51.7 -5.7 6.2 82.0 -32 2264 No stop 06 30 00 =1654+866 22 49 28 51.7 -5.7 6.3 81.6 58 2269 06 28 31 06 30 00 PSJ1721+8842 22 49 28 52.2 -2.1 5.8 91.9 -32 2269 No stop 06 33 25 --- 22 52 54 52.1 -2.1 5.8 91.0 173 2283 06 30 01 06 34 10 J1639+8631 22 53 39 51.7 -5.6 6.3 80.6 13 2283 06 34 10 06 35 35 =1654+866 22 55 04 51.6 -5.6 6.4 80.2 85 2288 06 34 11 06 35 35 PSJ1721+8842 22 55 04 52.1 -2.1 5.9 90.5 -32 2288 No stop 06 39 00 --- 22 58 30 52.1 -2.1 5.9 89.6 173 2301 06 35 36 Schedule for DEFFORD (Code De ) Page 18 Resolving a gravitationally lensed dual back-hole system at z = 2.37 UP: D => Below limits; H => Below horizon mask; W => still slewing at end; blank => Up. Early: Seconds between end of slew and start. Dwell: On source seconds. Disk: GBytes recorded to this point. TPStart: Recording start time. Frequencies are LO sum (band edge). SYNC: Time correlator is expected to sync up. ---------------------------------------------------------------------------------------- Start UT Source Start / Stop Early Disk TPStart Stop UT LST EL AZ HA UP ParA Dwell GBytes SYNC ---------------------------------------------------------------------------------------- --- Sat 29 May 2021 Day 149 --- 06 39 00 J1639+8631 22 58 30 51.6 -5.6 6.4 79.4 -31 2301 No stop 06 40 30 =1654+866 23 00 00 51.6 -5.6 6.4 79.0 59 2307 06 39 01 06 40 30 PSJ1721+8842 23 00 00 52.1 -2.1 5.9 89.2 -31 2307 No stop 06 43 55 --- 23 03 25 52.1 -2.1 6.0 88.4 174 2320 06 40 31 06 44 40 J1639+8631 23 04 11 51.5 -5.6 6.5 78.0 14 2320 06 44 40 06 46 05 =1654+866 23 05 36 51.5 -5.6 6.5 77.6 85 2326 06 44 41 06 46 05 PSJ1721+8842 23 05 36 52.1 -2.1 6.0 87.8 -31 2326 No stop 06 49 30 --- 23 09 01 52.1 -2.1 6.1 87.0 174 2339 06 46 06 06 49 30 J1639+8631 23 09 01 51.4 -5.6 6.6 76.8 -31 2339 No stop 06 51 00 =1654+866 23 10 32 51.4 -5.6 6.6 76.4 59 2345 06 49 31 06 51 00 PSJ1721+8842 23 10 32 52.0 -2.1 6.1 86.6 -31 2345 No stop 06 54 25 --- 23 13 57 52.0 -2.1 6.2 85.7 174 2358 06 51 01 06 55 10 J1639+8631 23 14 42 51.3 -5.5 6.7 75.4 14 2358 06 55 10 06 56 35 =1654+866 23 16 07 51.3 -5.5 6.7 75.1 85 2364 06 55 11 06 56 35 PSJ1721+8842 23 16 07 52.0 -2.1 6.2 85.2 -31 2364 No stop 07 00 00 --- 23 19 33 52.0 -2.1 6.3 84.3 174 2377 06 56 36 07 00 00 J1639+8631 23 19 33 51.3 -5.5 6.8 74.2 -31 2377 No stop 07 01 30 =1654+866 23 21 03 51.3 -5.5 6.8 73.8 59 2383 07 00 01 07 01 30 PSJ1721+8842 23 21 03 52.0 -2.1 6.3 84.0 -31 2383 No stop 07 04 55 --- 23 24 29 52.0 -2.1 6.3 83.1 174 2396 07 01 31 07 05 40 J1639+8631 23 25 14 51.2 -5.5 6.9 72.8 14 2396 07 05 40 07 07 05 =1654+866 23 26 39 51.2 -5.5 6.9 72.5 85 2401 07 05 41 07 07 05 PSJ1721+8842 23 26 39 51.9 -2.1 6.4 82.6 -31 2401 No stop 07 10 30 --- 23 30 05 51.9 -2.1 6.4 81.7 174 2414 07 07 06 07 10 30 J1639+8631 23 30 05 51.1 -5.4 6.9 71.6 -31 2414 No stop 07 12 00 =1654+866 23 31 35 51.1 -5.4 7.0 71.3 59 2420 07 10 31 07 12 00 PSJ1721+8842 23 31 35 51.9 -2.1 6.5 81.3 -31 2420 No stop 07 15 25 --- 23 35 01 51.9 -2.1 6.5 80.5 174 2433 07 12 01 07 16 10 J1639+8631 23 35 46 51.0 -5.4 7.0 70.3 14 2433 07 16 10 07 17 35 =1654+866 23 37 11 51.0 -5.4 7.1 69.9 85 2439 07 16 11 Schedule for DEFFORD (Code De ) Page 19 Resolving a gravitationally lensed dual back-hole system at z = 2.37 UP: D => Below limits; H => Below horizon mask; W => still slewing at end; blank => Up. Early: Seconds between end of slew and start. Dwell: On source seconds. Disk: GBytes recorded to this point. TPStart: Recording start time. Frequencies are LO sum (band edge). SYNC: Time correlator is expected to sync up. ---------------------------------------------------------------------------------------- Start UT Source Start / Stop Early Disk TPStart Stop UT LST EL AZ HA UP ParA Dwell GBytes SYNC ---------------------------------------------------------------------------------------- --- Sat 29 May 2021 Day 149 --- 07 17 35 PSJ1721+8842 23 37 11 51.9 -2.1 6.6 80.0 -31 2439 No stop 07 21 00 --- 23 40 36 51.9 -2.1 6.6 79.1 174 2452 07 17 36 07 21 00 J1639+8631 23 40 36 51.0 -5.3 7.1 69.1 -30 2452 No stop 07 22 30 =1654+866 23 42 07 50.9 -5.3 7.1 68.7 60 2458 07 21 01 07 22 30 PSJ1721+8842 23 42 07 51.9 -2.1 6.6 78.7 -30 2458 No stop 07 25 55 --- 23 45 32 51.8 -2.1 6.7 77.9 175 2471 07 22 31 07 26 40 J1639+8631 23 46 17 50.9 -5.3 7.2 67.7 15 2471 07 26 40 07 28 05 =1654+866 23 47 43 50.9 -5.3 7.2 67.4 85 2477 07 26 41 07 28 05 PSJ1721+8842 23 47 43 51.8 -2.1 6.7 77.3 -30 2477 No stop 07 30 30 --- 23 50 08 51.8 -2.1 6.8 76.7 115 2486 07 28 06 SETUP FILE INFORMATION: NOTE: If DOPPLER, FREQ, or BW were used, see the individual scans for the final BBC settings. ======== Setup file: sess221.L1024 --- WARNING --- This group does not match an entry in the frequency catalog. This might be ok because the catalog is not complete. But be very careful to be sure that the setup is correct. Setup group: 18 Station: DEFFORD Total bit rate: 512 Format: VDIF Bits per sample: 2 Sample rate:128.000 Number of channels: 2 DBE type: Speedup factor: 1.00 Disk used to record data. 1st LO= 2272.00 2272.00 Net SB= U U IF SB = L L Pol. = RCP LCP BBC = 1 9 BBC SB= L L IF = A1 B1 The following frequency sets based on these setups were used. Frequency Set: 14 Setup file default. Used with PCAL = off LO sum= 1626.49 1626.49 BBC fr= 645.51 645.51 Bandwd= 64.00 64.00 Matching frequency sets: 14 15 16 17 18 Track assignments are: track1= 1, 2 barrel=roll_off POSITIONS OF SOURCES USED IN RECORDING SCANS Source Source position (RA/Dec) Error (B1950) (J2000) (Date) (mas) * PSJ1721+8842 18 08 47.084813 * 17 21 43.936000 17 03 39.644560 0.00 88 43 26.13207 * 88 42 21.42800 88 40 48.95086 0.00 From catalog imbedded in main SCHED input file. * 3C84 03 16 29.567265 * 03 19 48.160096 03 21 10.311462 1.50 J0319+4130 41 19 51.91692 * 41 30 42.10404 41 35 08.24304 2.86 0316+413 /home/guest/rmc/SCHED/sched11.6/catalogs/sources.gsfc J0319+41 GSFC 2016a X/S astro solution, 10291 observations. 1654+866 16 54 31.289232 * 16 39 25.014806 16 33 41.277383 10.77 * J1639+8631 86 37 07.15444 * 86 31 53.13177 86 29 20.00418 0.62 J1639+86 /home/guest/rmc/SCHED/sched11.6/catalogs/sources.gsfc GSFC 2016a X/S astro solution, 43 observations. * 3C345 16 41 17.606229 * 16 42 58.809967 16 43 43.226759 0.79 J1642+3948 39 54 10.81492 * 39 48 36.99399 39 46 13.08296 0.59 1641+399 /home/guest/rmc/SCHED/sched11.6/catalogs/sources.gsfc J1642+39 GSFC 2016a X/S astro solution, 53724 observations. * 3C454.3 22 51 29.519739 * 22 53 57.747939 22 55 00.061697 0.65 J2253+1608 15 52 54.34808 * 16 08 53.56091 16 15 29.40943 0.73 2251+158 /home/guest/rmc/SCHED/sched11.6/catalogs/sources.gsfc J2253+16 GSFC 2016a X/S astro solution, 41272 observations. SOURCE SCAN SUMMARY FOR SOURCES LISTED ABOVE Scan hours are for recording scans only. Baseline hours are only counted for scans above horizon at both ends. Source Setup file Frequency sets Observing hours (duplicates not shown) Scan Baseline PSJ1721+884sess221.L1024 1 2 3 4 5 6 7 8 9 12 13 14 7.158 942.437 3C84 sess221.L1024 1 2 3 4 5 6 7 8 9 12 13 14 0.083 11.593 J1639+8631 sess221.L1024 1 2 3 4 5 6 7 8 9 12 13 14 3.313 410.527 3C345 sess221.L1024 1 2 3 4 5 6 7 8 9 12 13 14 0.083 11.321 3C454.3 sess221.L1024 1 2 3 4 5 6 7 8 9 12 13 14 0.083 11.521 EFFECT OF SOLAR CORONA The solar corona can cause unstable phases for sources too close to the Sun. SCHED provides warnings at individual scans for distances less than 10 degrees. The distance from the Sun to each source in this schedule is: Source Sun distance (deg) PSJ1721+8842 69.7 3C84 24.0 J1639+8631 71.9 3C345 118.4 3C454.3 77.2 Barry Clark estimates from predictions by Ketan Desai of IPM scattering sizes that the Sun will cause amplitude reductions on the longest VLBA baselines at a solar distance of 60deg F^(-0.6) where F is in GHz. For common VLBI bands, this is: 327 MHz 117. deg 610 MHz 81. deg 1.6 GHz 45. deg 2.3 GHz 36. deg 5.0 GHz 23. deg 8.4 GHz 17. deg 15.0 GHz 12. deg 22.0 GHz 9. deg 43.0 GHz 6. deg