COVER INFORMATION Station: TIANMA65 (Code T6 ) Experiment: EVN+e-MERLIN -Growing black holes or supernova factories in extremely op Exp. Code: EB103D Schedule Version: 2.00 Processed by SCHED version: 11.60 Release 11.6; April 2020 PI: Ann Njeri Address: Newcastel University/Jodrell Bank Centre for Astrophysics Herschel Building NE1 7RU, United Kingdom Phone: +447459552429 EMAIL: ann.njeri@newcastle.ac.uk Fax: Phone during observation: Observing mode: Notes: **** Phase-cal off please **** Single pointing with all telescopes Schedule for TIANMA65 (Code T6 ) Page 2 EVN+e-MERLIN -Growing black holes or supernova factories in extremely op 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 10 Mar 2024 Day 70 --- Next scan frequencies: 1626.49 1626.49 1626.49 1626.49 1690.49 1690.49 1690.49 1690.49 Next BBC frequencies: 643.51 643.51 643.51 643.51 579.51 579.51 579.51 579.51 Next scan bandwidths: 32.00 32.00 32.00 32.00 32.00 32.00 32.00 32.00 20 30 00 3C286 15 50 34 60.4 277.7 2.3 79.6 0 0 20 30 00 20 35 00 --- 15 55 34 59.3 278.1 2.4 79.3 300 39 20 30 01 20 35 00 J0927+3902 15 55 34 14.3 307.2 6.4 61.3 -184 39 No stop 20 45 30 =4C39.25 16 06 06 12.5 308.2 6.6 59.9 446 120 20 35 01 20 47 00 J1321+2216 16 07 36 52.2 266.6 2.8 67.3 -70 120 20 47 00 20 52 00 --- 16 12 37 51.2 267.3 2.8 67.4 230 158 20 47 01 20 52 00 IC860 16 12 37 50.7 271.6 2.9 70.2 -11 158 No stop 20 55 00 --- 16 15 38 50.0 271.9 3.0 70.1 169 182 20 52 01 20 55 00 J1321+2216 16 15 38 50.5 267.7 2.9 67.5 -10 182 No stop 20 57 00 --- 16 17 38 50.1 268.0 2.9 67.5 110 197 20 55 01 20 57 00 IC860 16 17 38 49.6 272.2 3.0 70.1 -10 197 No stop 21 00 00 --- 16 20 39 49.0 272.5 3.1 70.1 170 220 20 57 01 21 00 20 J1321+2216 16 20 59 49.4 268.5 3.0 67.5 10 220 21 00 20 21 02 00 --- 16 22 39 49.0 268.7 3.0 67.6 100 233 21 00 21 21 02 00 IC860 16 22 39 48.5 272.8 3.1 70.0 -10 233 No stop 21 05 00 --- 16 25 39 47.9 273.1 3.2 70.0 170 256 21 02 01 21 05 00 J1321+2216 16 25 39 48.4 269.1 3.1 67.6 -10 256 No stop 21 07 00 --- 16 27 40 47.9 269.3 3.1 67.6 110 272 21 05 01 21 07 00 IC860 16 27 40 47.5 273.4 3.2 69.9 -10 272 No stop 21 10 00 --- 16 30 40 46.8 273.7 3.2 69.9 170 295 21 07 01 21 10 20 J1321+2216 16 31 00 47.2 269.8 3.1 67.6 10 295 21 10 20 21 12 00 --- 16 32 41 46.9 270.0 3.2 67.6 100 308 21 10 21 21 12 00 IC860 16 32 41 46.4 273.9 3.3 69.8 -10 308 No stop 21 15 00 --- 16 35 41 45.8 274.3 3.3 69.8 170 331 21 12 01 21 15 00 J1321+2216 16 35 41 46.2 270.4 3.2 67.6 -10 331 No stop 21 17 00 --- 16 37 41 45.8 270.6 3.3 67.6 110 347 21 15 01 21 17 00 IC860 16 37 41 45.3 274.5 3.4 69.7 -10 347 No stop 21 20 00 --- 16 40 42 44.7 274.8 3.4 69.7 170 370 21 17 01 Schedule for TIANMA65 (Code T6 ) Page 3 EVN+e-MERLIN -Growing black holes or supernova factories in extremely op 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 10 Mar 2024 Day 70 --- 21 20 20 J1321+2216 16 41 02 45.1 271.1 3.3 67.6 10 370 21 20 20 21 22 00 --- 16 42 42 44.7 271.3 3.3 67.6 100 383 21 20 21 21 22 00 IC860 16 42 42 44.3 275.1 3.4 69.6 -10 383 No stop 21 25 00 --- 16 45 43 43.6 275.4 3.5 69.5 170 406 21 22 01 21 25 00 J1321+2216 16 45 43 44.1 271.6 3.4 67.5 -9 406 No stop 21 27 00 --- 16 47 43 43.6 271.9 3.4 67.5 111 421 21 25 01 21 27 00 IC860 16 47 43 43.2 275.6 3.5 69.5 -9 421 No stop 21 30 00 --- 16 50 44 42.6 275.9 3.6 69.4 171 444 21 27 01 21 30 20 J1321+2216 16 51 04 42.9 272.3 3.5 67.5 11 444 21 30 20 21 32 00 --- 16 52 44 42.6 272.5 3.5 67.5 100 457 21 30 21 21 32 00 IC860 16 52 44 42.1 276.2 3.6 69.3 -9 457 No stop 21 35 00 --- 16 55 44 41.5 276.5 3.7 69.2 171 480 21 32 01 21 35 00 J1321+2216 16 55 44 41.9 272.9 3.6 67.4 -9 480 No stop 21 37 00 --- 16 57 45 41.5 273.1 3.6 67.4 111 496 21 35 01 21 37 00 IC860 16 57 45 41.1 276.7 3.7 69.2 -9 496 No stop 21 40 00 --- 17 00 45 40.4 277.0 3.7 69.1 171 519 21 37 01 21 40 20 J1321+2216 17 01 05 40.8 273.5 3.6 67.3 11 519 21 40 20 21 42 00 --- 17 02 45 40.4 273.7 3.7 67.3 100 532 21 40 21 21 42 00 IC860 17 02 45 40.0 277.2 3.8 69.0 -9 532 No stop 21 45 00 --- 17 05 46 39.4 277.6 3.8 68.9 171 555 21 42 01 21 45 00 J1321+2216 17 05 46 39.8 274.0 3.7 67.3 -9 555 No stop 21 47 00 --- 17 07 46 39.4 274.3 3.8 67.2 111 571 21 45 01 21 47 00 IC860 17 07 46 38.9 277.8 3.9 68.8 -9 571 No stop 21 50 00 --- 17 10 47 38.3 278.1 3.9 68.7 171 594 21 47 01 21 50 20 J1321+2216 17 11 07 38.6 274.7 3.8 67.1 11 594 21 50 20 21 52 00 --- 17 12 47 38.3 274.9 3.8 67.1 100 607 21 50 21 21 52 00 IC860 17 12 47 37.9 278.3 3.9 68.6 -9 607 No stop 21 55 00 --- 17 15 48 37.2 278.6 4.0 68.5 171 630 21 52 01 21 55 00 J1321+2216 17 15 48 37.6 275.2 3.9 67.0 -9 630 No stop 21 57 00 --- 17 17 48 37.2 275.4 3.9 67.0 111 645 21 55 01 Schedule for TIANMA65 (Code T6 ) Page 4 EVN+e-MERLIN -Growing black holes or supernova factories in extremely op 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 10 Mar 2024 Day 70 --- 21 57 00 IC860 17 17 48 36.8 278.8 4.0 68.4 -9 645 No stop 22 00 00 --- 17 20 48 36.2 279.1 4.1 68.3 171 669 21 57 01 22 00 20 J1321+2216 17 21 08 36.5 275.8 4.0 66.9 11 669 22 00 20 22 02 00 --- 17 22 49 36.1 276.0 4.0 66.8 100 681 22 00 21 22 02 00 IC860 17 22 49 35.7 279.3 4.1 68.2 -9 681 No stop 22 05 00 --- 17 25 49 35.1 279.7 4.2 68.1 171 705 22 02 01 22 05 00 J1321+2216 17 25 49 35.5 276.3 4.1 66.8 -9 705 No stop 22 07 00 --- 17 27 50 35.1 276.6 4.1 66.7 111 720 22 05 01 22 07 00 IC860 17 27 50 34.7 279.9 4.2 68.0 -9 720 No stop 22 10 00 --- 17 30 50 34.1 280.2 4.2 67.8 171 743 22 07 01 22 10 20 J1321+2216 17 31 10 34.4 276.9 4.1 66.6 11 743 22 10 20 22 12 00 --- 17 32 50 34.0 277.1 4.2 66.5 100 756 22 10 21 22 12 00 IC860 17 32 50 33.6 280.4 4.3 67.8 -9 756 No stop 22 15 00 --- 17 35 51 33.0 280.7 4.3 67.6 171 779 22 12 01 22 15 00 J1321+2216 17 35 51 33.4 277.5 4.2 66.4 -8 779 No stop 22 17 00 --- 17 37 51 33.0 277.7 4.3 66.4 112 795 22 15 01 22 17 00 IC860 17 37 51 32.6 280.9 4.4 67.5 -8 795 No stop 22 20 00 --- 17 40 52 31.9 281.2 4.4 67.4 172 818 22 17 01 22 20 20 J1321+2216 17 41 12 32.2 278.0 4.3 66.3 12 818 22 20 20 22 22 00 --- 17 42 52 31.9 278.2 4.3 66.2 100 831 22 20 21 22 22 00 IC860 17 42 52 31.5 281.4 4.4 67.3 -8 831 No stop 22 25 00 --- 17 45 53 30.9 281.7 4.5 67.1 172 854 22 22 01 22 25 00 J1321+2216 17 45 53 31.3 278.6 4.4 66.1 -8 854 No stop 22 27 00 --- 17 47 53 30.8 278.8 4.4 66.0 112 870 22 25 01 22 27 00 IC860 17 47 53 30.5 281.9 4.5 67.0 -8 870 No stop 22 30 00 --- 17 50 53 29.8 282.2 4.6 66.9 172 893 22 27 01 22 30 20 J1321+2216 17 51 13 30.1 279.1 4.5 65.9 12 893 22 30 20 22 32 00 --- 17 52 54 29.8 279.3 4.5 65.8 100 906 22 30 21 22 32 00 IC860 17 52 54 29.4 282.5 4.6 66.8 -8 906 No stop 22 35 00 --- 17 55 54 28.8 282.8 4.7 66.6 172 929 22 32 01 Schedule for TIANMA65 (Code T6 ) Page 5 EVN+e-MERLIN -Growing black holes or supernova factories in extremely op 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 10 Mar 2024 Day 70 --- 22 35 00 J1321+2216 17 55 54 29.1 279.7 4.6 65.7 -8 929 No stop 22 37 00 --- 17 57 55 28.7 279.9 4.6 65.6 112 944 22 35 01 22 37 00 IC860 17 57 55 28.4 283.0 4.7 66.5 -8 944 No stop 22 40 00 --- 18 00 55 27.7 283.3 4.7 66.3 172 967 22 37 01 22 40 20 J1321+2216 18 01 15 28.0 280.2 4.6 65.5 12 967 22 40 20 22 42 00 --- 18 02 55 27.7 280.4 4.7 65.4 100 980 22 40 21 22 42 00 IC860 18 02 55 27.3 283.5 4.8 66.2 -8 980 No stop 22 45 00 --- 18 05 56 26.7 283.8 4.8 66.0 172 1004 22 42 01 22 45 00 J1321+2216 18 05 56 27.0 280.7 4.7 65.3 -8 1004 No stop 22 47 00 --- 18 07 56 26.6 281.0 4.8 65.2 112 1019 22 45 01 22 47 00 IC860 18 07 56 26.3 284.0 4.9 65.9 -8 1019 No stop 22 50 00 --- 18 10 57 25.7 284.3 4.9 65.8 172 1042 22 47 01 22 50 20 J1321+2216 18 11 17 25.9 281.3 4.8 65.0 12 1042 22 50 20 22 52 00 --- 18 12 57 25.5 281.5 4.8 64.9 100 1055 22 50 21 22 52 00 IC860 18 12 57 25.2 284.5 4.9 65.6 -8 1055 No stop 22 55 00 --- 18 15 57 24.6 284.8 5.0 65.5 172 1078 22 52 01 22 55 00 J1321+2216 18 15 57 24.9 281.8 4.9 64.8 -8 1078 No stop 22 57 00 --- 18 17 58 24.5 282.1 4.9 64.7 112 1094 22 55 01 22 57 00 IC860 18 17 58 24.2 285.0 5.0 65.3 -8 1094 No stop 23 00 00 --- 18 20 58 23.6 285.4 5.1 65.1 172 1117 22 57 01 23 00 20 J1321+2216 18 21 18 23.8 282.4 5.0 64.5 12 1117 23 00 20 23 02 00 --- 18 22 59 23.4 282.6 5.0 64.5 100 1130 23 00 21 23 02 00 IC860 18 22 59 23.2 285.6 5.1 65.0 -8 1130 No stop 23 05 00 --- 18 25 59 22.6 285.9 5.2 64.8 172 1153 23 02 01 23 05 00 J1321+2216 18 25 59 22.8 282.9 5.1 64.3 -8 1153 No stop 23 07 00 --- 18 27 59 22.4 283.1 5.1 64.2 112 1168 23 05 01 23 07 00 IC860 18 27 59 22.1 286.1 5.2 64.7 -8 1168 No stop 23 10 00 --- 18 31 00 21.5 286.4 5.2 64.5 172 1192 23 07 01 23 10 20 J1321+2216 18 31 20 21.7 283.5 5.1 64.0 12 1192 23 10 20 23 12 00 --- 18 33 00 21.4 283.7 5.2 63.9 100 1204 23 10 21 Schedule for TIANMA65 (Code T6 ) Page 6 EVN+e-MERLIN -Growing black holes or supernova factories in extremely op 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 10 Mar 2024 Day 70 --- 23 24 30 J1321+2216 18 45 32 18.8 285.1 5.4 63.2 748 1204 23 24 30 23 30 30 --- 18 51 33 17.5 285.7 5.5 62.9 360 1251 23 24 31 23 30 30 IC860 18 51 33 17.3 288.6 5.6 63.1 -8 1251 No stop 23 33 30 --- 18 54 34 16.7 288.9 5.6 62.9 172 1274 23 30 31 23 33 30 J1321+2216 18 54 34 16.9 286.1 5.5 62.7 -8 1274 No stop 23 35 30 --- 18 56 34 16.5 286.3 5.6 62.5 112 1289 23 33 31 23 35 30 IC860 18 56 34 16.3 289.1 5.7 62.7 -8 1289 No stop 23 38 30 --- 18 59 35 15.7 289.5 5.7 62.5 172 1313 23 35 31 23 38 50 J1321+2216 18 59 55 15.8 286.7 5.6 62.3 12 1313 23 38 50 23 40 30 --- 19 01 35 15.5 286.9 5.7 62.2 100 1326 23 38 51 23 40 30 IC860 19 01 35 15.3 289.7 5.8 62.4 -8 1326 No stop 23 43 30 --- 19 04 35 14.7 290.0 5.8 62.1 172 1349 23 40 31 23 43 30 J1321+2216 19 04 35 14.8 287.2 5.7 62.0 -8 1349 No stop 23 45 30 --- 19 06 36 14.4 287.4 5.7 61.9 112 1364 23 43 31 23 45 30 IC860 19 06 36 14.3 290.2 5.8 62.0 -8 1364 No stop 23 48 30 --- 19 09 36 13.7 290.6 5.9 61.8 172 1387 23 45 31 23 48 50 J1321+2216 19 09 56 13.7 287.8 5.8 61.7 12 1387 23 48 50 23 50 30 --- 19 11 37 13.4 288.0 5.8 61.6 100 1400 23 48 51 23 50 30 IC860 19 11 37 13.3 290.8 5.9 61.6 -8 1400 No stop 23 53 30 --- 19 14 37 12.7 291.1 6.0 61.4 172 1423 23 50 31 23 53 30 J1321+2216 19 14 37 12.8 288.3 5.9 61.4 -8 1423 No stop 23 55 30 --- 19 16 37 12.4 288.6 5.9 61.2 112 1439 23 53 31 23 55 30 IC860 19 16 37 12.3 291.4 6.0 61.2 -8 1439 No stop 23 58 30 --- 19 19 38 11.7 291.7 6.1 61.0 172 1462 23 55 31 --- Start: Sun 10 Mar 2024 Day 70 -- Stop: Mon 11 Mar 2024 Day 71 --- 23 58 50 J1321+2216 19 19 58 11.7 288.9 6.0 61.0 12 1462 23 58 50 00 00 30 --- 19 21 38 11.4 289.1 6.0 60.9 100 1475 23 58 51 00 00 30 IC860 19 21 38 11.3 291.9 6.1 60.8 -8 1475 No stop 00 03 30 --- 19 24 39 10.7 292.3 6.1 60.6 172 1498 00 00 31 Schedule for TIANMA65 (Code T6 ) Page 7 EVN+e-MERLIN -Growing black holes or supernova factories in extremely op 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 11 Mar 2024 Day 71 --- 00 03 30 J1321+2216 19 24 39 10.8 289.5 6.0 60.6 -8 1498 No stop 00 05 30 --- 19 26 39 10.4 289.7 6.1 60.5 112 1514 00 03 31 00 05 30 IC860 19 26 39 10.3 292.5 6.2 60.4 -8 1514 No stop 00 08 30 --- 19 29 40 9.7 292.8 6.2 60.1 172 1537 00 05 31 00 08 50 J1321+2216 19 30 00 9.7 290.1 6.1 60.3 12 1537 00 08 50 00 10 30 --- 19 31 40 9.3 290.3 6.2 60.1 100 1550 00 08 51 01 50 50 J1642+3948 21 12 16 35.9 299.0 4.5 76.9 5837 1550 01 50 50 02 00 30 =3C345 21 21 58 34.1 299.6 4.6 75.6 580 1624 01 50 51 SETUP FILE INFORMATION: NOTE: If DOPPLER, FREQ, or BW were used, see the individual scans for the final BBC settings. ======== Setup file: sess124.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: 11 Station: TIANMA65 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= 2270.00 2270.00 2270.00 2270.00 2270.00 2270.00 2270.00 2270.00 Net SB= L L U U L L U U IF SB = L L L L L L L L Pol. = RCP LCP RCP LCP RCP LCP RCP LCP BBC = 1 5 1 5 2 6 2 6 BBC SB= U U L L U U L L IF = A4 B3 A4 B3 A4 B3 A4 B3 The following frequency sets based on these setups were used. Frequency Set: 7 Setup file default. Used with PCAL = off LO sum= 1626.49 1626.49 1626.49 1626.49 1690.49 1690.49 1690.49 1690.49 BBC fr= 643.51 643.51 643.51 643.51 579.51 579.51 579.51 579.51 Bandwd= 32.00 32.00 32.00 32.00 32.00 32.00 32.00 32.00 Matching frequency sets: 7 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) * IC860 13 12 39.496724 * 13 15 03.510000 13 16 14.331378 0.00 24 52 58.07250 * 24 37 07.70000 24 29 16.36500 0.00 From catalog imbedded in main SCHED input file. Target * J1321+2216 13 18 46.850235 * 13 21 11.202556 13 22 22.129757 0.00 22 31 53.67224 * 22 16 12.10843 22 08 24.94908 0.00 From catalog imbedded in main SCHED input file. Phaseref approx 2.74 degrees from IC860 4C39.25 09 23 55.319216 * 09 27 03.013937 09 28 35.045126 0.31 * J0927+3902 39 15 23.56644 * 39 02 20.85185 38 56 05.33481 0.16 0923+392 /home/guest/rmc/SCHED/sched11.6/catalogs/sources.gsfc J0927+39 GSFC 2016a X/S astro solution, 250526 observations. * 3C286 13 28 49.657769 * 13 31 08.288061 13 32 16.584387 0.17 J1331+3030 30 45 58.64066 * 30 30 32.95930 30 22 52.03752 0.16 1328+307 /home/guest/rmc/SCHED/sched11.6/catalogs/sources.gsfc J1331+30 GSFC 2016a X/S astro solution, 269 observations. 3C345 16 41 17.606229 * 16 42 58.809967 16 43 47.992001 0.79 * J1642+3948 39 54 10.81492 * 39 48 36.99399 39 45 31.39589 0.59 1641+399 /home/guest/rmc/SCHED/sched11.6/catalogs/sources.gsfc J1642+39 GSFC 2016a X/S astro solution, 53724 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 IC860 sess124.L1024 1 2 3 4 5 6 7 8 9 10 11 12 4.100 375.286 J1321+2216 sess124.L1024 1 2 3 4 5 6 7 8 9 10 11 12 2.772 228.078 J0927+3902 sess124.L1024 1 2 3 4 5 6 7 8 9 10 11 12 0.342 24.161 3C286 sess124.L1024 1 2 3 4 5 6 7 8 9 10 11 12 0.083 10.000 J1642+3948 sess124.L1024 1 2 3 4 5 6 7 8 9 10 11 12 0.361 24.470 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) IC860 146.3 J1321+2216 146.4 J0927+3902 135.6 3C286 140.0 J1642+3948 100.5 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