COVER INFORMATION Station: DARNHALL (Code Da ) Experiment: Imaging the innermost jet in the off-axis ULX Cyg X-3 Exp. Code: EY049 Schedule Version: 2.00 Processed by SCHED version: 11.60 Release 11.6; April 2020 PI: Jun Yang Address: Onsala Space Observatory SE-439 92 Onsala Sweden Phone: +46 31 7725531 EMAIL: jun.yang@chalmers.se Fax: +46 31 7725590 Phone during observation: +46 31 7725531 Observing mode: 4096-32-2 Notes: 4096 Mbps, 32x32 MHz, RCP & LCP, 2 bit sampling K Band/22 GHz, P-Cal off, four e-MERLIN stations, double the bandwidth EF: scheduled two 8-minute gaps for pointing observations Schedule for DARNHALL (Code Da ) Page 2 Imaging the innermost jet in the off-axis ULX Cyg X-3 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 ---------------------------------------------------------------------------------------- --- Tue 25 Feb 2025 Day 56 --- Next scan frequencies: 22125.00 22125.00 22189.00 22189.00 Next BBC frequencies: 768.00 768.00 704.00 704.00 Next scan bandwidths: 64.00 64.00 64.00 64.00 02 30 00 J2015+3710 12 40 43 16.9 49.5 -7.6 -35.0 0 0 02 30 00 02 34 00 =2013+370 12 44 43 17.4 50.2 -7.5 -35.4 240 31 02 30 01 02 35 00 J2018+3851 12 45 43 18.5 48.8 -7.6 -35.5 39 31 02 35 00 02 37 00 --- 12 47 44 18.7 49.2 -7.5 -35.7 120 46 02 35 01 02 38 00 J2023+4125 12 48 44 20.4 46.9 -7.6 -35.8 34 46 02 38 00 02 41 00 --- 12 51 44 20.7 47.4 -7.5 -36.1 180 70 02 38 01 02 42 00 J2035+4049 12 52 44 19.1 46.0 -7.7 -34.8 37 70 02 42 00 02 45 00 --- 12 55 45 19.4 46.5 -7.7 -35.1 180 93 02 42 01 02 45 45 CYG-X3 12 56 30 19.9 47.0 -7.6 -35.6 33 93 02 45 45 02 53 45 --- 13 04 31 20.8 48.3 -7.5 -36.4 480 155 02 45 46 02 54 10 G79.977+0.81 13 04 56 21.0 48.3 -7.5 -36.5 17 155 02 54 10 02 54 50 --- 13 05 37 21.0 48.4 -7.5 -36.6 40 160 02 54 11 02 55 15 CYG-X3 13 06 02 20.9 48.6 -7.5 -36.6 17 160 02 55 15 03 03 15 --- 13 14 03 21.8 49.9 -7.3 -37.4 480 222 02 55 16 03 03 40 G79.977+0.81 13 14 28 22.0 49.8 -7.3 -37.5 17 222 03 03 40 03 04 20 --- 13 15 08 22.1 49.9 -7.3 -37.6 40 227 03 03 41 03 04 45 CYG-X3 13 15 33 22.0 50.1 -7.3 -37.6 17 227 03 04 45 03 12 45 --- 13 23 35 23.0 51.4 -7.2 -38.4 480 289 03 04 46 03 13 30 J2018+3851 13 24 20 23.1 55.2 -6.9 -39.3 12 289 03 13 30 03 14 10 --- 13 25 00 23.2 55.3 -6.9 -39.3 40 294 03 13 31 03 14 55 CYG-X3 13 25 45 23.2 51.7 -7.1 -38.6 13 294 03 14 55 03 22 55 --- 13 33 46 24.2 53.0 -7.0 -39.4 480 356 03 14 56 03 23 20 G79.977+0.81 13 34 11 24.4 53.0 -7.0 -39.5 17 356 03 23 20 03 24 00 --- 13 34 51 24.4 53.1 -7.0 -39.6 40 361 03 23 21 03 24 25 CYG-X3 13 35 16 24.3 53.3 -7.0 -39.6 17 361 03 24 25 03 32 25 --- 13 43 18 25.3 54.5 -6.8 -40.4 480 423 03 24 26 03 32 50 G79.977+0.81 13 43 43 25.5 54.5 -6.8 -40.5 17 423 03 32 50 03 33 30 --- 13 44 23 25.6 54.6 -6.8 -40.5 40 428 03 32 51 Schedule for DARNHALL (Code Da ) Page 3 Imaging the innermost jet in the off-axis ULX Cyg X-3 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 ---------------------------------------------------------------------------------------- --- Tue 25 Feb 2025 Day 56 --- 03 33 55 CYG-X3 13 44 48 25.5 54.8 -6.8 -40.5 17 428 03 33 55 03 41 55 --- 13 52 49 26.5 56.1 -6.7 -41.3 480 490 03 33 56 03 42 40 J2018+3851 13 53 34 26.8 60.0 -6.4 -41.9 12 490 03 42 40 03 43 20 --- 13 54 15 26.9 60.1 -6.4 -41.9 40 495 03 42 41 03 44 05 CYG-X3 13 55 00 26.8 56.4 -6.6 -41.5 13 495 03 44 05 03 52 05 --- 14 03 01 27.8 57.7 -6.5 -42.2 480 556 03 44 06 03 52 30 G79.977+0.81 14 03 26 28.0 57.6 -6.5 -42.3 17 556 03 52 30 03 53 10 --- 14 04 06 28.0 57.7 -6.5 -42.4 40 562 03 52 31 03 53 35 CYG-X3 14 04 31 28.0 57.9 -6.5 -42.3 17 562 03 53 35 04 01 35 --- 14 12 33 29.0 59.2 -6.3 -43.1 480 623 03 53 36 04 02 00 G79.977+0.81 14 12 58 29.2 59.1 -6.3 -43.2 17 623 04 02 00 04 02 40 --- 14 13 38 29.3 59.2 -6.3 -43.2 40 629 04 02 01 04 03 05 CYG-X3 14 14 03 29.2 59.4 -6.3 -43.2 17 629 04 03 05 04 11 05 --- 14 22 04 30.2 60.7 -6.2 -43.9 480 690 04 03 06 04 11 50 J2018+3851 14 22 49 30.7 64.7 -5.9 -44.2 11 690 04 11 50 04 12 30 --- 14 23 29 30.7 64.8 -5.9 -44.2 40 696 04 11 51 04 13 15 CYG-X3 14 24 14 30.5 61.0 -6.2 -44.1 12 696 04 13 15 04 21 15 --- 14 32 16 31.6 62.3 -6.0 -44.7 480 757 04 13 16 04 21 40 G79.977+0.81 14 32 41 31.7 62.2 -6.0 -44.8 17 757 04 21 40 04 22 20 --- 14 33 21 31.8 62.3 -6.0 -44.9 40 763 04 21 41 04 22 45 CYG-X3 14 33 46 31.8 62.5 -6.0 -44.8 17 763 04 22 45 04 30 45 --- 14 41 47 32.8 63.8 -5.9 -45.5 480 824 04 22 46 04 31 10 G79.977+0.81 14 42 12 33.0 63.7 -5.9 -45.6 17 824 04 31 10 04 31 50 --- 14 42 53 33.1 63.8 -5.8 -45.7 40 830 04 31 11 04 32 15 CYG-X3 14 43 18 33.0 64.0 -5.8 -45.6 17 830 04 32 15 04 40 15 --- 14 51 19 34.1 65.3 -5.7 -46.2 480 891 04 32 16 04 41 00 J2018+3851 14 52 04 34.7 69.5 -5.5 -46.2 11 891 04 41 00 04 41 40 --- 14 52 44 34.8 69.6 -5.4 -46.3 40 897 04 41 01 Schedule for DARNHALL (Code Da ) Page 4 Imaging the innermost jet in the off-axis ULX Cyg X-3 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 ---------------------------------------------------------------------------------------- --- Tue 25 Feb 2025 Day 56 --- ---------- Long gap for EF to do pointing observations ---------- 04 42 40 J2015+3710 14 53 44 34.2 71.7 -5.4 -45.7 36 897 04 42 40 04 49 40 =2013+370 15 00 45 35.2 72.9 -5.3 -46.1 420 951 04 42 41 04 50 25 CYG-X3 15 01 31 35.5 66.9 -5.5 -47.0 4 951 04 50 25 04 58 25 --- 15 09 32 36.6 68.1 -5.4 -47.6 480 1013 04 50 26 04 58 50 G79.977+0.81 15 09 57 36.8 68.1 -5.4 -47.7 17 1013 04 58 50 04 59 30 --- 15 10 37 36.9 68.2 -5.4 -47.7 40 1018 04 58 51 04 59 55 CYG-X3 15 11 02 36.8 68.4 -5.4 -47.7 17 1018 04 59 55 05 07 55 --- 15 19 03 38.0 69.7 -5.2 -48.2 480 1080 04 59 56 05 08 20 G79.977+0.81 15 19 29 38.1 69.6 -5.2 -48.3 17 1080 05 08 20 05 09 00 --- 15 20 09 38.2 69.7 -5.2 -48.4 40 1085 05 08 21 05 09 25 CYG-X3 15 20 34 38.2 69.9 -5.2 -48.3 16 1085 05 09 25 05 17 25 --- 15 28 35 39.3 71.2 -5.1 -48.8 480 1146 05 09 26 05 18 15 J2018+3851 15 29 25 40.0 75.7 -4.8 -48.3 15 1146 05 18 15 05 18 55 --- 15 30 05 40.1 75.8 -4.8 -48.3 40 1152 05 18 16 05 19 40 CYG-X3 15 30 50 39.6 71.5 -5.0 -48.9 10 1152 05 19 40 05 27 40 --- 15 38 52 40.8 72.8 -4.9 -49.4 480 1213 05 19 41 05 28 05 G79.977+0.81 15 39 17 41.0 72.7 -4.9 -49.6 17 1213 05 28 05 05 28 45 --- 15 39 57 41.1 72.9 -4.9 -49.6 40 1219 05 28 06 05 29 10 CYG-X3 15 40 22 41.0 73.1 -4.9 -49.5 16 1219 05 29 10 05 37 10 --- 15 48 23 42.1 74.4 -4.7 -50.0 480 1280 05 29 11 05 37 35 G79.977+0.81 15 48 48 42.3 74.3 -4.7 -50.1 17 1280 05 37 35 05 38 15 --- 15 49 28 42.4 74.4 -4.7 -50.2 40 1286 05 37 36 05 38 40 CYG-X3 15 49 54 42.4 74.6 -4.7 -50.0 16 1286 05 38 40 05 46 40 --- 15 57 55 43.5 76.0 -4.6 -50.5 480 1347 05 38 41 05 47 30 J2018+3851 15 58 45 44.3 80.7 -4.3 -49.5 14 1347 05 47 30 05 48 10 --- 15 59 25 44.4 80.8 -4.3 -49.6 40 1353 05 47 31 05 48 55 CYG-X3 16 00 10 43.9 76.3 -4.6 -50.6 9 1353 05 48 55 05 56 55 --- 16 08 12 45.0 77.7 -4.4 -51.0 480 1414 05 48 56 Schedule for DARNHALL (Code Da ) Page 5 Imaging the innermost jet in the off-axis ULX Cyg X-3 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 ---------------------------------------------------------------------------------------- --- Tue 25 Feb 2025 Day 56 --- 05 57 20 G79.977+0.81 16 08 37 45.2 77.6 -4.4 -51.1 17 1414 05 57 20 05 58 00 --- 16 09 17 45.3 77.7 -4.4 -51.1 40 1420 05 57 21 05 58 25 CYG-X3 16 09 42 45.2 77.9 -4.4 -51.0 16 1420 05 58 25 06 06 25 --- 16 17 43 46.4 79.3 -4.3 -51.4 480 1481 05 58 26 06 06 50 G79.977+0.81 16 18 08 46.6 79.2 -4.3 -51.5 17 1481 06 06 50 06 07 30 --- 16 18 48 46.7 79.3 -4.2 -51.6 40 1487 06 06 51 06 07 55 CYG-X3 16 19 13 46.6 79.5 -4.2 -51.4 16 1487 06 07 55 06 15 55 --- 16 27 15 47.8 80.9 -4.1 -51.7 480 1548 06 07 56 06 16 45 J2018+3851 16 28 05 48.7 86.1 -3.9 -50.3 12 1548 06 16 45 06 17 25 --- 16 28 45 48.8 86.2 -3.8 -50.3 40 1554 06 16 46 ---------- Long gap for EF to do pointing observations ---------- 06 18 25 J2015+3710 16 29 45 48.3 88.9 -3.8 -48.9 33 1554 06 18 25 06 25 25 =2013+370 16 36 46 49.4 90.3 -3.7 -48.9 420 1608 06 18 26 06 26 30 CYG-X3 16 37 51 49.4 82.8 -3.9 -52.1 20 1608 06 26 30 06 34 30 --- 16 45 53 50.6 84.2 -3.8 -52.3 480 1669 06 26 31 06 34 55 G79.977+0.81 16 46 18 50.8 84.1 -3.8 -52.5 16 1669 06 34 55 06 35 35 --- 16 46 58 50.9 84.2 -3.8 -52.5 40 1675 06 34 56 06 36 00 CYG-X3 16 47 23 50.8 84.5 -3.8 -52.3 15 1675 06 36 00 06 44 00 --- 16 55 24 52.0 86.0 -3.6 -52.5 480 1736 06 36 01 06 44 25 G79.977+0.81 16 55 49 52.2 85.9 -3.6 -52.7 16 1736 06 44 25 06 45 05 --- 16 56 29 52.3 86.0 -3.6 -52.7 40 1742 06 44 26 06 45 30 CYG-X3 16 56 54 52.2 86.3 -3.6 -52.5 15 1742 06 45 30 06 53 30 --- 17 04 56 53.4 87.8 -3.5 -52.6 480 1803 06 45 31 06 54 35 J2018+3851 17 06 01 54.4 93.6 -3.2 -50.3 25 1803 06 54 35 06 55 15 --- 17 06 41 54.5 93.8 -3.2 -50.3 40 1809 06 54 36 06 56 20 CYG-X3 17 07 46 53.9 88.3 -3.4 -52.6 26 1809 06 56 20 07 04 20 --- 17 15 48 55.1 89.9 -3.3 -52.7 480 1870 06 56 21 07 04 45 G79.977+0.81 17 16 13 55.3 89.8 -3.3 -52.9 16 1870 07 04 45 07 05 25 --- 17 16 53 55.4 89.9 -3.3 -52.9 40 1876 07 04 46 Schedule for DARNHALL (Code Da ) Page 6 Imaging the innermost jet in the off-axis ULX Cyg X-3 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 ---------------------------------------------------------------------------------------- --- Tue 25 Feb 2025 Day 56 --- 07 05 50 CYG-X3 17 17 18 55.3 90.2 -3.3 -52.7 15 1876 07 05 50 07 13 50 --- 17 25 19 56.5 91.9 -3.1 -52.6 480 1937 07 05 51 07 14 15 G79.977+0.81 17 25 44 56.7 91.7 -3.1 -52.8 16 1937 07 14 15 07 14 55 --- 17 26 24 56.8 91.9 -3.1 -52.8 40 1943 07 14 16 07 15 20 CYG-X3 17 26 49 56.7 92.2 -3.1 -52.6 15 1943 07 15 20 07 23 20 --- 17 34 51 57.9 93.9 -3.0 -52.5 480 2004 07 15 21 07 24 25 J2018+3851 17 35 56 58.8 100.5 -2.7 -49.3 23 2004 07 24 25 07 25 05 --- 17 36 36 58.9 100.6 -2.7 -49.3 40 2010 07 24 26 07 26 10 CYG-X3 17 37 41 58.4 94.5 -2.9 -52.4 24 2010 07 26 10 07 34 10 --- 17 45 42 59.6 96.3 -2.8 -52.2 480 2071 07 26 11 07 34 35 G79.977+0.81 17 46 08 59.7 96.1 -2.8 -52.4 15 2071 07 34 35 07 35 15 --- 17 46 48 59.8 96.3 -2.8 -52.4 40 2077 07 34 36 07 35 40 CYG-X3 17 47 13 59.8 96.6 -2.8 -52.2 14 2077 07 35 40 07 43 40 --- 17 55 14 61.0 98.5 -2.6 -51.8 480 2138 07 35 41 07 44 05 G79.977+0.81 17 55 39 61.1 98.4 -2.6 -52.1 15 2138 07 44 05 07 44 45 --- 17 56 19 61.2 98.5 -2.6 -52.0 40 2144 07 44 06 07 45 10 CYG-X3 17 56 44 61.2 98.9 -2.6 -51.8 14 2144 07 45 10 07 53 10 --- 18 04 46 62.4 100.9 -2.5 -51.3 480 2205 07 45 11 07 54 15 J2018+3851 18 05 51 63.2 108.5 -2.2 -47.0 20 2205 07 54 15 07 54 55 --- 18 06 31 63.3 108.7 -2.2 -46.9 40 2211 07 54 16 07 56 00 CYG-X3 18 07 36 62.8 101.6 -2.4 -51.1 21 2211 07 56 00 08 04 00 --- 18 15 37 64.0 103.7 -2.3 -50.6 480 2272 07 56 01 08 04 25 G79.977+0.81 18 16 02 64.1 103.6 -2.3 -50.8 15 2272 08 04 25 08 05 05 --- 18 16 43 64.2 103.7 -2.3 -50.7 40 2278 08 04 26 08 05 30 CYG-X3 18 17 08 64.2 104.1 -2.3 -50.4 14 2278 08 05 30 08 13 30 --- 18 25 09 65.3 106.4 -2.1 -49.7 480 2339 08 05 31 08 13 55 G79.977+0.81 18 25 34 65.5 106.3 -2.1 -49.9 15 2339 08 13 55 08 14 35 --- 18 26 14 65.6 106.4 -2.1 -49.9 40 2345 08 13 56 08 15 00 CYG-X3 18 26 39 65.6 106.9 -2.1 -49.5 14 2345 08 15 00 08 23 00 --- 18 34 41 66.7 109.3 -2.0 -48.6 480 2406 08 15 01 Schedule for DARNHALL (Code Da ) Page 7 Imaging the innermost jet in the off-axis ULX Cyg X-3 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 ---------------------------------------------------------------------------------------- --- Tue 25 Feb 2025 Day 56 --- 08 24 05 J2018+3851 18 35 46 67.3 118.3 -1.7 -42.7 15 2406 08 24 05 08 24 45 --- 18 36 26 67.4 118.6 -1.7 -42.6 40 2411 08 24 06 08 25 45 J2015+3710 18 37 26 66.6 122.9 -1.6 -39.2 26 2411 08 25 45 08 29 45 =2013+370 18 41 27 67.1 124.5 -1.6 -38.4 240 2442 08 25 46 SETUP FILE INFORMATION: NOTE: If DOPPLER, FREQ, or BW were used, see the individual scans for the final BBC settings. ======== Setup file: sess125.K4096nt --- 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: 16 Station: DARNHALL Total bit rate: 1024 Format: VDIF Bits per sample: 2 Sample rate:128.000 Number of channels: 4 DBE type: Speedup factor: 1.00 Disk used to record data. 1st LO= 22893.00 22893.00 22893.00 22893.00 Net SB= U U U U IF SB = L L L L Pol. = RCP LCP RCP LCP BBC = 1 9 2 10 BBC SB= L L L L IF = A1 B1 A1 B1 The following frequency sets based on these setups were used. Frequency Set: 15 Setup file default. Used with PCAL = off LO sum= 22125.00 22125.00 22189.00 22189.00 BBC fr= 768.00 768.00 704.00 704.00 Bandwd= 64.00 64.00 64.00 64.00 Matching frequency sets: 15 16 17 18 Track assignments are: track1= 1, 2, 3, 4 barrel=roll_off POSITIONS OF SOURCES USED IN RECORDING SCANS Source Source position (RA/Dec) Error (B1950) (J2000) (Date) (mas) * CYG-X3 20 30 37.609355 * 20 32 25.769443 20 33 18.354231 0.00 40 47 12.60948 * 40 57 27.87978 41 02 21.55553 0.00 From catalog imbedded in main SCHED input file. * G79.977+0.81 20 30 33.033016 * 20 32 20.900000 20 33 13.331182 0.00 40 57 39.40173 * 41 07 54.40000 41 12 47.92270 0.00 From catalog imbedded in main SCHED input file. No accurate position available * J2023+4125 20 21 50.118817 * 20 23 36.163900 20 24 27.708946 0.00 41 15 42.31611 * 41 25 26.74400 41 30 04.23357 0.00 From catalog imbedded in main SCHED input file. * J2035+4049 20 33 27.825067 * 20 35 16.636000 20 36 09.540417 0.00 40 39 18.62990 * 40 49 43.66000 40 54 42.46184 0.00 From catalog imbedded in main SCHED input file. * J2018+3851 20 16 41.516202 * 20 18 31.024200 20 19 24.425607 0.00 38 41 53.25421 * 38 51 19.38200 38 55 47.50296 0.00 From catalog imbedded in main SCHED input file. 2013+370 20 13 37.014517 * 20 15 28.729803 20 16 23.308245 0.09 * J2015+3710 37 01 44.45878 * 37 10 59.51466 37 15 22.00660 0.12 /home/guest/rmc/SCHED/sched11.6/catalogs/sources.gsfc GSFC 2016a X/S astro solution, 131 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 CYG-X3 sess125.K4096nt 1 2 3 4 5 6 7 8 9 10 13 14 + 4.400 673.129 G79.977+0.8sess125.K4096nt 1 2 3 4 5 6 7 8 9 10 13 14 + 0.244 37.400 J2023+4125 sess125.K4096nt 1 2 3 4 5 6 7 8 9 10 13 14 + 0.050 7.650 J2035+4049 sess125.K4096nt 1 2 3 4 5 6 7 8 9 10 13 14 + 0.050 7.650 J2018+3851 sess125.K4096nt 1 2 3 4 5 6 7 8 9 10 13 14 + 0.156 23.715 J2015+3710 sess125.K4096nt 1 2 3 4 5 6 7 8 9 10 13 14 + 0.367 49.867 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) CYG-X3 57.3 G79.977+0.81 57.4 J2023+4125 58.6 J2035+4049 56.8 J2018+3851 57.3 J2015+3710 56.4 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