COVER INFORMATION Station: HART (Code Hh ) Experiment: 18cm global VLBI observations of the starburst galaxy Arp 220 Exp. Code: gv028c Schedule Version: 2.00 Processed by SCHED version: 11.60 Release 11.6; April 2020 PI: Eskil Varenius Address: Chalmers University of Technology Onsala Space Observatory 439 92 Onsala Sweden Phone: +46706755341 EMAIL: eskil.varenius@chalmers.se Fax: Phone during observation: +46706755341 Observing mode: vlbi Notes: VLA please use all 27 stations at 18cm. Phase calibrator: J1532+2344 Fringe finder: J1516+1932 Pol. cal.: OQ208 COVER LETTER: This is one of three .key files to observe Arp 220 at 18cm, 6cm and 3.6cm during EVN session I 2023. Arp 220 has two nuclei 1 arcsec apart; we aim to point right in the middle of them, to get both at the same time. OPERATOR NOTES: VLA27: Please use all 27 stations at 18cm. Schedule for HART (Code Hh ) Page 2 18cm global VLBI observations of the starburst galaxy Arp 220 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 ---------------------------------------------------------------------------------------- --- Sun 12 Mar 2023 Day 71 --- Next scan frequencies: 1626.00 1626.00 1626.00 1626.00 1690.00 1690.00 1690.00 1690.00 Next BBC frequencies: 116.00 116.00 116.00 116.00 180.00 180.00 180.00 180.00 Next scan bandwidths: 32.00 32.00 32.00 32.00 32.00 32.00 32.00 32.00 22 30 00 J1516+1932 11 41 59 20.7 54.6 -3.6 0.0 0 0 22 30 00 22 35 00 =1514+197 11 47 00 21.6 53.8 -3.5 0.0 300 39 22 30 01 22 37 23 OQ208 11 49 23 26.4 34.0 -2.3 0.0 81 39 22 37 23 22 42 23 --- 11 54 24 27.0 32.9 -2.2 0.0 300 77 22 37 24 22 44 35 J1532+2344 11 56 36 17.8 51.4 -3.6 0.0 62 77 22 44 35 22 46 05 =1530+239 11 58 06 18.1 51.1 -3.6 0.0 90 89 22 44 36 22 46 31 ARP220 11 58 33 17.9 51.6 -3.6 0.0 1 89 22 46 31 22 57 01 --- 12 09 04 19.7 49.9 -3.4 0.0 630 170 22 46 32 22 57 28 J1532+2344 12 09 31 20.0 49.3 -3.4 0.0 1 170 22 57 28 22 58 58 =1530+239 12 11 02 20.3 49.1 -3.4 0.0 90 182 22 57 29 22 59 24 ARP220 12 11 28 20.2 49.5 -3.4 0.0 1 182 22 59 24 23 09 54 --- 12 22 00 21.9 47.8 -3.2 0.0 630 263 22 59 25 23 10 21 J1532+2344 12 22 27 22.2 47.2 -3.2 0.0 1 263 23 10 21 23 11 51 =1530+239 12 23 57 22.5 46.9 -3.2 0.0 90 274 23 10 22 23 12 18 ARP220 12 24 24 22.3 47.4 -3.2 0.0 1 274 23 12 18 23 22 48 --- 12 34 55 24.0 45.5 -3.0 0.0 630 356 23 12 19 23 23 15 J1532+2344 12 35 22 24.3 44.9 -3.0 0.0 1 356 23 23 15 23 24 45 =1530+239 12 36 53 24.5 44.6 -2.9 0.0 90 367 23 23 16 23 25 11 ARP220 12 37 19 24.4 45.1 -3.0 0.0 1 367 23 25 11 23 35 41 --- 12 47 51 26.1 43.2 -2.8 0.0 630 448 23 25 12 23 36 08 J1532+2344 12 48 18 26.3 42.5 -2.8 0.0 1 448 23 36 08 23 37 38 =1530+239 12 49 48 26.5 42.2 -2.7 0.0 90 460 23 36 09 23 39 54 OQ208 12 52 04 32.8 19.9 -1.3 0.0 65 460 23 39 54 23 44 54 --- 12 57 05 33.2 18.7 -1.2 0.0 300 499 23 39 55 23 47 04 J1532+2344 12 59 16 27.9 40.3 -2.6 0.0 61 499 23 47 04 23 48 34 =1530+239 13 00 46 28.2 40.0 -2.6 0.0 90 510 23 47 05 23 49 01 ARP220 13 01 13 28.1 40.6 -2.6 0.0 1 510 23 49 01 23 59 31 --- 13 11 45 29.6 38.4 -2.4 0.0 630 591 23 49 02 Schedule for HART (Code Hh ) Page 3 18cm global VLBI observations of the starburst galaxy Arp 220 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 ---------------------------------------------------------------------------------------- --- Start: Sun 12 Mar 2023 Day 71 -- Stop: Mon 13 Mar 2023 Day 72 --- 23 59 58 J1532+2344 13 12 12 29.8 37.7 -2.4 0.0 1 591 23 59 58 00 01 28 =1530+239 13 13 42 30.0 37.4 -2.3 0.0 90 603 23 59 59 00 01 54 ARP220 13 14 08 29.9 37.9 -2.4 0.0 1 603 00 01 54 00 12 24 --- 13 24 40 31.3 35.6 -2.2 0.0 630 684 00 01 55 00 12 51 J1532+2344 13 25 07 31.5 34.9 -2.1 0.0 1 684 00 12 51 00 14 21 =1530+239 13 26 37 31.7 34.5 -2.1 0.0 90 696 00 12 52 00 14 47 ARP220 13 27 04 31.7 35.1 -2.1 0.0 1 696 00 14 47 00 25 17 --- 13 37 35 33.0 32.7 -2.0 0.0 630 777 00 14 48 00 25 44 J1532+2344 13 38 02 33.1 31.9 -1.9 0.0 1 777 00 25 44 00 27 14 =1530+239 13 39 33 33.3 31.6 -1.9 0.0 90 788 00 25 45 00 27 41 ARP220 13 39 59 33.3 32.1 -1.9 0.0 1 788 00 27 41 00 38 11 --- 13 50 31 34.5 29.6 -1.8 0.0 630 870 00 27 42 00 38 37 J1532+2344 13 50 58 34.6 28.8 -1.7 0.0 1 870 00 38 37 00 40 07 =1530+239 13 52 28 34.7 28.5 -1.7 0.0 90 881 00 38 38 00 42 18 OQ208 13 54 39 35.7 3.6 -0.2 0.0 60 881 00 42 18 00 47 18 --- 13 59 39 35.7 2.3 -0.1 0.0 300 920 00 42 19 00 49 23 J1532+2344 14 01 45 35.7 26.2 -1.5 0.0 56 920 00 49 23 00 50 53 =1530+239 14 03 15 35.8 25.8 -1.5 0.0 90 931 00 49 24 00 51 19 ARP220 14 03 41 35.9 26.3 -1.5 0.0 1 931 00 51 19 01 01 49 --- 14 14 13 36.9 23.6 -1.4 0.0 630 1013 00 51 20 01 02 16 J1532+2344 14 14 40 36.9 22.8 -1.3 0.0 1 1013 01 02 16 01 03 46 =1530+239 14 16 10 37.0 22.4 -1.3 0.0 90 1024 01 02 17 01 04 12 ARP220 14 16 36 37.1 23.0 -1.3 0.0 1 1024 01 04 12 01 14 42 --- 14 27 08 38.0 20.1 -1.1 0.0 630 1105 01 04 13 01 15 09 J1532+2344 14 27 35 37.9 19.3 -1.1 0.0 1 1105 01 15 09 01 16 39 =1530+239 14 29 05 38.0 18.9 -1.1 0.0 90 1117 01 15 10 01 17 05 ARP220 14 29 31 38.1 19.5 -1.1 0.0 1 1117 01 17 05 01 27 35 --- 14 40 03 38.9 16.5 -0.9 0.0 630 1198 01 17 06 01 28 01 J1532+2344 14 40 30 38.8 15.7 -0.9 0.0 1 1198 01 28 01 01 29 31 =1530+239 14 42 00 38.9 15.3 -0.9 0.0 90 1210 01 28 02 Schedule for HART (Code Hh ) Page 4 18cm global VLBI observations of the starburst galaxy Arp 220 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 ---------------------------------------------------------------------------------------- --- Mon 13 Mar 2023 Day 72 --- 01 29 58 ARP220 14 42 26 39.0 15.9 -0.9 0.0 1 1210 01 29 58 01 40 28 --- 14 52 58 39.6 12.8 -0.7 0.0 630 1291 01 29 59 01 40 54 J1532+2344 14 53 25 39.5 12.0 -0.7 0.0 1 1291 01 40 54 01 42 24 =1530+239 14 54 55 39.6 11.6 -0.6 0.0 90 1302 01 40 55 01 44 25 OQ208 14 56 56 34.5 346.9 0.8 0.0 50 1302 01 44 25 01 49 25 --- 15 01 57 34.2 345.6 0.9 0.0 300 1341 01 44 26 01 51 24 J1532+2344 15 03 56 39.9 8.9 -0.5 0.0 50 1341 01 51 24 01 52 54 =1530+239 15 05 26 40.0 8.5 -0.5 0.0 90 1353 01 51 25 01 53 20 ARP220 15 05 53 40.2 9.0 -0.5 0.0 1 1353 01 53 20 02 03 50 --- 15 16 24 40.5 5.9 -0.3 0.0 630 1434 01 53 21 02 04 18 J1532+2344 15 16 52 40.3 5.1 -0.3 0.0 2 1434 02 04 18 02 05 48 =1530+239 15 18 23 40.3 4.6 -0.3 0.0 90 1445 02 04 19 02 06 15 ARP220 15 18 50 40.5 5.2 -0.3 0.0 1 1445 02 06 15 02 16 45 --- 15 29 21 40.7 2.0 -0.1 0.0 630 1527 02 06 16 02 17 14 J1532+2344 15 29 50 40.4 1.2 -0.1 0.0 3 1527 02 17 14 02 18 44 =1530+239 15 31 20 40.5 0.7 -0.0 0.0 90 1538 02 17 15 02 19 11 ARP220 15 31 48 40.7 1.3 -0.1 0.0 2 1538 02 19 11 02 29 41 --- 15 42 19 40.7 358.1 0.1 0.0 630 1619 02 19 12 02 30 10 J1532+2344 15 42 49 40.4 357.3 0.2 0.0 4 1619 02 30 10 02 31 40 =1530+239 15 44 19 40.4 356.8 0.2 0.0 90 1631 02 30 11 02 32 08 ARP220 15 44 47 40.6 357.3 0.1 0.0 2 1631 02 32 08 02 42 38 --- 15 55 19 40.5 354.2 0.3 0.0 630 1712 02 32 09 02 43 08 J1532+2344 15 55 49 40.2 353.4 0.4 0.0 4 1712 02 43 08 02 44 38 =1530+239 15 57 19 40.1 352.9 0.4 0.0 90 1724 02 43 09 02 47 21 OQ208 16 00 02 29.5 331.7 1.9 0.0 92 1724 02 47 21 02 52 21 --- 16 05 03 28.9 330.6 1.9 0.0 300 1762 02 47 22 02 54 59 J1532+2344 16 07 42 39.8 349.9 0.6 0.0 89 1762 02 54 59 02 56 29 =1530+239 16 09 12 39.7 349.4 0.6 0.0 90 1774 02 55 00 02 56 58 ARP220 16 09 41 40.0 349.9 0.6 0.0 4 1774 02 56 58 03 07 28 --- 16 20 13 39.5 346.8 0.7 0.0 630 1855 02 56 59 Schedule for HART (Code Hh ) Page 5 18cm global VLBI observations of the starburst galaxy Arp 220 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 ---------------------------------------------------------------------------------------- --- Mon 13 Mar 2023 Day 72 --- 03 07 59 J1532+2344 16 20 44 39.2 346.1 0.8 0.0 6 1855 03 07 59 03 09 29 =1530+239 16 22 14 39.1 345.7 0.8 0.0 90 1867 03 08 00 03 09 59 ARP220 16 22 44 39.4 346.1 0.8 0.0 4 1867 03 09 59 03 20 29 --- 16 33 16 38.8 343.1 1.0 0.0 630 1948 03 10 00 03 21 01 J1532+2344 16 33 48 38.4 342.4 1.0 0.0 6 1948 03 21 01 03 22 31 =1530+239 16 35 18 38.3 342.0 1.0 0.0 90 1959 03 21 02 03 23 01 ARP220 16 35 48 38.6 342.4 1.0 0.0 5 1959 03 23 01 03 33 31 --- 16 46 20 37.8 339.4 1.2 0.0 630 2040 03 23 02 03 34 03 J1532+2344 16 46 52 37.4 338.8 1.2 0.0 7 2040 03 34 03 03 35 33 =1530+239 16 48 22 37.3 338.4 1.2 0.0 90 2052 03 34 04 03 36 03 ARP220 16 48 53 37.6 338.8 1.2 0.0 5 2052 03 36 03 03 46 33 --- 16 59 24 36.7 335.9 1.4 0.0 630 2133 03 36 04 03 47 06 J1532+2344 16 59 57 36.3 335.4 1.4 0.0 7 2133 03 47 06 03 48 36 =1530+239 17 01 27 36.1 335.0 1.5 0.0 90 2145 03 47 07 03 51 44 OQ208 17 04 36 21.2 318.9 2.9 0.0 117 2145 03 51 44 03 56 44 --- 17 09 36 20.4 318.0 3.0 0.0 300 2183 03 51 45 03 59 41 J1532+2344 17 12 34 35.0 332.1 1.6 0.0 108 2183 03 59 41 04 01 11 =1530+239 17 14 04 34.8 331.8 1.7 0.0 90 2195 03 59 42 04 01 42 ARP220 17 14 35 35.2 332.1 1.6 0.0 6 2195 04 01 42 04 12 12 --- 17 25 07 34.1 329.5 1.8 0.0 630 2276 04 01 43 04 12 44 J1532+2344 17 25 40 33.5 329.0 1.9 0.0 7 2276 04 12 44 04 14 14 =1530+239 17 27 10 33.4 328.6 1.9 0.0 90 2288 04 12 45 04 14 46 ARP220 17 27 41 33.8 328.9 1.9 0.0 6 2288 04 14 46 04 25 16 --- 17 38 13 32.5 326.4 2.0 0.0 630 2369 04 14 47 04 25 48 J1532+2344 17 38 46 32.0 325.9 2.1 0.0 7 2369 04 25 48 04 27 18 =1530+239 17 40 16 31.8 325.6 2.1 0.0 90 2381 04 25 49 04 27 49 ARP220 17 40 47 32.2 325.8 2.1 0.0 6 2381 04 27 49 04 38 19 --- 17 51 19 30.8 323.5 2.3 0.0 630 2462 04 27 50 04 38 52 J1532+2344 17 51 52 30.3 323.1 2.3 0.0 7 2462 04 38 52 04 40 22 =1530+239 17 53 22 30.0 322.7 2.3 0.0 90 2473 04 38 53 Schedule for HART (Code Hh ) Page 6 18cm global VLBI observations of the starburst galaxy Arp 220 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 ---------------------------------------------------------------------------------------- --- Mon 13 Mar 2023 Day 72 --- 04 40 53 ARP220 17 53 53 30.5 322.9 2.3 0.0 6 2473 04 40 53 04 51 23 --- 18 04 25 29.0 320.7 2.5 0.0 630 2554 04 40 54 04 51 55 J1532+2344 18 04 57 28.4 320.3 2.5 0.0 7 2554 04 51 55 04 53 25 =1530+239 18 06 28 28.2 320.0 2.5 0.0 90 2566 04 51 56 04 56 16 OQ208 18 09 19 10.7 308.9 4.0 0.0 101 2566 04 56 16 04 57 16 --- 18 10 19 10.5 308.8 4.0 0.0 60 2574 04 56 17 04 57 16 OQ208 18 10 19 10.5 308.8 4.0 0.0 -20 2574 No stop 05 01 16 --- 18 14 20 9.8 308.2 4.1 0.0 220 2605 04 57 17 05 03 55 J1532+2344 18 16 59 26.7 318.0 2.7 0.0 90 2605 05 03 55 05 04 55 =1530+239 18 17 59 26.5 317.8 2.7 0.0 60 2612 05 03 56 05 04 55 J1532+2344 18 17 59 26.5 317.8 2.7 0.0 -20 2612 No stop 05 05 25 =1530+239 18 18 29 26.4 317.7 2.7 0.0 10 2616 05 04 56 05 05 56 ARP220 18 19 00 26.9 317.8 2.7 0.0 5 2616 05 05 56 05 16 26 --- 18 29 32 25.2 315.8 2.9 0.0 630 2697 05 05 57 05 16 58 J1532+2344 18 30 04 24.6 315.5 2.9 0.0 6 2697 05 16 58 05 17 58 =1530+239 18 31 04 24.5 315.3 3.0 0.0 60 2705 05 16 59 05 17 58 J1532+2344 18 31 04 24.5 315.3 3.0 0.0 -20 2705 No stop 05 18 28 =1530+239 18 31 34 24.4 315.2 3.0 0.0 10 2709 05 17 59 05 18 58 ARP220 18 32 04 24.8 315.4 2.9 0.0 5 2709 05 18 58 05 29 28 --- 18 42 36 23.1 313.5 3.1 0.0 630 2790 05 18 59 05 30 00 J1532+2344 18 43 08 22.5 313.2 3.2 0.0 6 2790 05 30 00 05 31 00 =1530+239 18 44 08 22.4 313.0 3.2 0.0 60 2798 05 30 01 05 31 00 J1532+2344 18 44 08 22.4 313.0 3.2 0.0 -20 2798 No stop 05 31 30 =1530+239 18 44 38 22.3 312.9 3.2 0.0 10 2802 05 31 01 05 32 00 ARP220 18 45 08 22.7 313.0 3.2 0.0 5 2802 05 32 00 05 42 30 --- 18 55 40 21.0 311.2 3.3 0.0 630 2883 05 32 01 05 43 01 J1532+2344 18 56 11 20.4 311.0 3.4 0.0 5 2883 05 43 01 05 44 01 =1530+239 18 57 11 20.2 310.8 3.4 0.0 60 2891 05 43 02 05 44 01 J1532+2344 18 57 11 20.2 310.8 3.4 0.0 -20 2891 No stop 05 44 31 =1530+239 18 57 41 20.1 310.7 3.4 0.0 10 2895 05 44 02 Schedule for HART (Code Hh ) Page 7 18cm global VLBI observations of the starburst galaxy Arp 220 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 ---------------------------------------------------------------------------------------- --- Mon 13 Mar 2023 Day 72 --- 05 45 01 ARP220 18 58 11 20.5 310.8 3.4 0.0 4 2895 05 45 01 05 55 31 --- 19 08 43 18.7 309.1 3.5 0.0 630 2976 05 45 02 05 56 01 J1532+2344 19 09 14 18.1 308.9 3.6 0.0 5 2976 05 56 01 05 57 31 =1530+239 19 10 44 17.8 308.7 3.6 0.0 90 2987 05 56 02 SETUP FILE INFORMATION: NOTE: If DOPPLER, FREQ, or BW were used, see the individual scans for the final BBC settings. ======== Setup file: sess123.L1024glob Matching groups in /home/guest/rmc/SCHED/sched11.6/catalogs/freq_RDBE.dat: hh18cm Values confirmed by E-mail Jonathan Quick 20140219 (CR) ****** Only 122.00 of 256.00 MHz total bandwidth is within the IFs in the setup file before any FREQ or DOPPLER shifts. Setup group: 16 Station: HART Total bit rate: 1024 Format: VDIF Bits per sample: 2 Sample rate: 64.000 Number of channels: 8 DBE type: DBBC_DDC Speedup factor: 1.00 Disk used to record data. 1st LO= 1510.00 1510.00 1510.00 1510.00 1510.00 1510.00 1510.00 1510.00 Net SB= L L U U L L U U IF SB = U U U U U U U U Pol. = RCP LCP RCP LCP RCP LCP RCP LCP BBC = 1 9 1 9 2 10 2 10 BBC SB= L L U U L L U U IF = A1 C1 A1 C1 A1 C1 A1 C1 The following frequency sets based on these setups were used. Frequency Set: 10 Setup file default. Used with PCAL = off LO sum= 1626.00 1626.00 1626.00 1626.00 1690.00 1690.00 1690.00 1690.00 BBC fr= 116.00 116.00 116.00 116.00 180.00 180.00 180.00 180.00 Bandwd= 32.00 32.00 32.00 32.00 32.00 32.00 32.00 32.00 Matching frequency sets: 10 Track assignments are: track1= 1, 2, 3, 4, 5, 6, 7, 8 barrel=roll_off POSITIONS OF SOURCES USED IN RECORDING SCANS Source Source position (RA/Dec) Error (B1950) (J2000) (Date) (mas) * ARP220 15 32 46.905485 * 15 34 57.250000 15 35 57.940194 0.00 23 40 07.75728 * 23 30 11.33000 23 25 18.96580 0.00 From catalog imbedded in main SCHED input file. * 3C286 13 28 49.657769 * 13 31 08.288061 13 32 13.487531 0.17 J1331+3030 30 45 58.64066 * 30 30 32.95930 30 23 13.19246 0.16 1328+307 /home/guest/rmc/SCHED/sched11.6/catalogs/sources.gsfc J1331+30 GSFC 2016a X/S astro solution, 269 observations. * OQ208 14 04 45.615156 * 14 07 00.394415 14 08 03.650024 0.24 J1407+2827 28 41 29.23515 * 28 27 14.69019 28 20 26.03181 0.35 1404+286 /home/guest/rmc/SCHED/sched11.6/catalogs/sources.gsfc J1407+28 GSFC 2016a X/S astro solution, 68278 observations. 1514+197 15 14 40.985841 * 15 16 56.796164 15 18 00.065612 0.01 * J1516+1932 19 43 10.94247 * 19 32 12.99203 19 26 53.79356 0.02 J1516+19 /home/guest/rmc/SCHED/sched11.6/catalogs/sources.gsfc GSFC 2016a X/S astro solution, 4472 observations. 1530+239 15 30 36.092759 * 15 32 46.345214 15 33 47.008502 0.08 * J1532+2344 23 54 09.32913 * 23 44 05.26796 23 39 09.39949 0.14 /home/guest/rmc/SCHED/sched11.6/catalogs/sources.gsfc GSFC 2016a X/S astro solution, 171 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 ARP220 sess123.L1024glob 1 2 3 4 5 6 7 8 9 10 11 17 + 12.250 1600.189 3C286 sess123.L1024glob 17 0.133 0.000 OQ208 sess123.L1024glob 1 2 3 4 5 6 7 8 9 10 11 17 + 1.500 188.550 J1516+1932 sess123.L1024glob 1 2 3 4 5 6 7 8 9 10 11 0.083 10.000 J1532+2344 sess123.L1024glob 1 2 3 4 5 6 7 8 9 10 11 17 + 2.183 275.621 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) ARP220 117.8 3C286 140.6 OQ208 135.1 J1516+1932 122.6 J1532+2344 118.2 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