COVER INFORMATION Station: TIANMA65 (Code T6 ) Experiment: Probing the radio jets in GRS1915+105 in a new puzzling accretion state Exp. Code: EM144C Schedule Version: 3.40 Processed by SCHED version: 11.60 Release 11.6; April 2020 PI: S.E.Motta Address: INAF - Osservatorio Astronomico di Brera Via E. Bianchi 46, I-23807 Merate Italy Phone: +39 3339445713 EMAIL: sara.motta@inaf.it Fax: Phone during observation: +39 3339445713 Observing mode: EVN, 6 GHz continuum Notes: Target (phase ref): GRS 1915+105 (J1905+0952) Fringe finders: J1800+3848, J2253+1608 Check source: J1913+0932 Schedule for TIANMA65 (Code T6 ) Page 2 Probing the radio jets in GRS1915+105 in a new puzzling accretion state 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 ---------------------------------------------------------------------------------------- --- Wed 16 Jun 2021 Day 167 --- Next scan frequencies: 4830.49 4830.49 4830.49 4830.49 4894.49 4894.49 4894.49 4894.49 4958.49 4958.49 4958.49 4958.49 5022.49 5022.49 5022.49 5022.49 Next BBC frequencies: 630.49 630.49 630.49 630.49 694.49 694.49 694.49 694.49 758.49 758.49 758.49 758.49 822.49 822.49 822.49 822.49 Next scan bandwidths: 32.00 32.00 32.00 32.00 32.00 32.00 32.00 32.00 32.00 32.00 32.00 32.00 32.00 32.00 32.00 32.00 21 30 00 J1800+3848 23 16 01 27.0 -59.1 5.2 70.5 0 0 21 30 00 21 35 00 =1758+388 23 21 02 26.1 -58.7 5.3 69.9 300 77 21 30 01 21 37 00 J1905+0952 23 23 02 27.2 265.2 4.3 W 60.0 -532 77 21 37 00 21 39 30 =1903+097 23 25 33 26.7 265.5 4.3 W 60.1 0 116 21 37 01 21 39 30 GRS1915 23 25 33 29.3 265.3 4.2 60.4 -12 116 No stop 21 43 00 --- 23 29 03 28.5 265.7 4.2 60.4 198 170 21 39 31 21 43 40 J1905+0952 23 29 43 25.8 266.1 4.4 60.1 28 170 21 43 40 21 45 30 =1903+097 23 31 34 25.4 266.3 4.4 60.2 110 198 21 43 41 21 45 30 GRS1915 23 31 34 28.0 266.1 4.3 60.5 -12 198 No stop 21 49 00 --- 23 35 04 27.2 266.6 4.3 60.5 198 252 21 45 31 21 49 00 J1905+0952 23 35 04 24.7 266.8 4.5 60.2 -12 252 No stop 21 51 30 =1903+097 23 37 35 24.1 267.1 4.5 60.3 138 291 21 49 01 21 51 30 GRS1915 23 37 35 26.7 266.9 4.4 60.6 -12 291 No stop 21 55 00 --- 23 41 05 25.9 267.4 4.4 60.6 198 345 21 51 31 21 55 40 J1905+0952 23 41 45 23.2 267.7 4.6 60.3 28 345 21 55 40 21 57 30 =1903+097 23 43 36 22.8 267.9 4.6 60.3 110 374 21 55 41 21 57 30 GRS1915 23 43 36 25.4 267.7 4.5 60.6 -12 374 No stop 22 01 00 --- 23 47 06 24.6 268.2 4.5 60.7 198 428 21 57 31 22 01 00 J1905+0952 23 47 06 22.1 268.4 4.7 60.3 -12 428 No stop 22 03 30 =1903+097 23 49 37 21.5 268.7 4.7 60.4 138 466 22 01 01 22 03 30 GRS1915 23 49 37 24.1 268.5 4.6 60.7 -12 466 No stop 22 07 00 --- 23 53 07 23.4 269.0 4.6 60.7 198 520 22 03 31 22 07 40 J1905+0952 23 53 47 20.6 269.3 4.8 60.4 28 520 22 07 40 22 09 30 =1903+097 23 55 38 20.3 269.5 4.8 60.4 110 549 22 07 41 22 09 30 GRS1915 23 55 38 22.8 269.3 4.7 60.7 -12 549 No stop 22 13 00 --- 23 59 08 22.1 269.7 4.7 60.7 198 603 22 09 31 Schedule for TIANMA65 (Code T6 ) Page 3 Probing the radio jets in GRS1915+105 in a new puzzling accretion state 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 ---------------------------------------------------------------------------------------- --- Wed 16 Jun 2021 Day 167 --- 22 13 00 J1905+0952 23 59 08 19.5 270.0 4.9 60.4 -12 603 No stop 22 15 30 =1903+097 00 01 39 19.0 270.3 4.9 60.4 138 642 22 13 01 22 15 30 GRS1915 00 01 39 21.5 270.1 4.8 60.7 -12 642 No stop 22 19 00 --- 00 05 09 20.8 270.5 4.8 60.7 198 696 22 15 31 22 19 40 J1905+0952 00 05 49 18.1 270.8 5.0 60.4 28 696 22 19 40 22 21 30 =1903+097 00 07 40 17.7 271.1 5.0 60.4 110 724 22 19 41 22 21 30 GRS1915 00 07 40 20.2 270.8 4.9 60.7 -12 724 No stop 22 25 00 --- 00 11 10 19.5 271.3 4.9 60.7 198 778 22 21 31 22 25 00 J1905+0952 00 11 10 16.9 271.5 5.1 60.3 -12 778 No stop 22 27 30 =1903+097 00 13 41 16.4 271.8 5.1 60.3 138 817 22 25 01 22 27 30 GRS1915 00 13 41 19.0 271.6 5.0 60.7 -12 817 No stop 22 31 00 --- 00 17 11 18.2 272.1 5.0 60.7 198 871 22 27 31 22 31 40 J1905+0952 00 17 51 15.5 272.4 5.2 60.3 28 871 22 31 40 22 33 30 =1903+097 00 19 42 15.1 272.6 5.2 60.3 110 899 22 31 41 22 33 30 J1913+0932 00 19 42 16.6 271.3 5.1 60.3 -8 899 No stop 22 37 00 --- 00 23 12 15.9 271.8 5.1 60.2 202 953 22 33 31 22 38 00 J1905+0952 00 24 12 14.1 273.2 5.3 60.2 52 953 22 38 00 22 40 30 =1903+097 00 26 43 13.6 273.5 5.3 60.2 150 992 22 38 01 22 40 30 GRS1915 00 26 43 16.2 273.3 5.2 60.6 -12 992 No stop 22 44 00 --- 00 30 13 15.4 273.7 5.2 60.5 198 1046 22 40 31 22 44 00 J1905+0952 00 30 13 12.9 273.9 5.4 60.1 -12 1046 No stop 22 46 30 =1903+097 00 32 44 12.3 274.2 5.4 60.1 138 1085 22 44 01 22 46 30 GRS1915 00 32 44 14.9 274.0 5.3 60.5 -12 1085 No stop 22 50 00 --- 00 36 14 14.1 274.4 5.3 60.4 198 1139 22 46 31 22 50 40 J1905+0952 00 36 55 11.4 274.8 5.5 60.0 28 1139 22 50 40 22 52 30 =1903+097 00 38 45 11.0 275.0 5.5 60.0 110 1167 22 50 41 22 52 30 GRS1915 00 38 45 13.6 274.8 5.4 60.4 -12 1167 No stop 22 56 00 --- 00 42 15 12.9 275.2 5.4 60.3 198 1221 22 52 31 22 56 00 J1905+0952 00 42 15 10.3 275.4 5.6 59.9 -12 1221 No stop 22 58 30 =1903+097 00 44 46 9.8 275.7 5.6 59.9 138 1260 22 56 01 Schedule for TIANMA65 (Code T6 ) Page 4 Probing the radio jets in GRS1915+105 in a new puzzling accretion state 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 ---------------------------------------------------------------------------------------- --- Wed 16 Jun 2021 Day 167 --- 22 58 30 GRS1915 00 44 46 12.3 275.5 5.5 60.3 -12 1260 No stop 23 02 00 --- 00 48 16 11.6 275.9 5.5 60.2 198 1314 22 58 31 23 02 40 J1905+0952 00 48 56 8.9 276.3 5.7 59.8 28 1314 23 02 40 23 04 30 =1903+097 00 50 47 8.5 276.5 5.7 59.7 110 1342 23 02 41 23 04 30 GRS1915 00 50 47 11.0 276.3 5.6 60.1 -12 1342 No stop 23 08 00 --- 00 54 17 10.3 276.7 5.6 60.0 198 1396 23 04 31 23 08 00 J1905+0952 00 54 17 7.7 276.9 5.8 59.6 -12 1396 No stop 23 10 30 =1903+097 00 56 48 7.2 277.3 5.8 59.6 138 1435 23 08 01 23 10 30 GRS1915 00 56 48 9.8 277.0 5.7 60.0 -12 1435 No stop 23 14 00 --- 01 00 18 9.0 277.4 5.7 59.9 198 1489 23 10 31 23 16 30 GRS1915 01 02 49 8.5 277.8 5.8 59.8 148 1489 23 16 30 23 20 00 --- 01 06 19 7.7 278.2 5.8 59.7 210 1543 23 16 31 23 22 30 GRS1915 01 08 50 7.2 278.5 5.9 59.6 148 1543 23 22 30 23 26 00 --- 01 12 20 6.5 278.9 5.9 D 59.5 0 1597 23 22 31 SETUP FILE INFORMATION: NOTE: If DOPPLER, FREQ, or BW were used, see the individual scans for the final BBC settings. ======== Setup file: sess221.C2048 --- 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: 14 Station: TIANMA65 Total bit rate: 2048 Format: VDIF Bits per sample: 2 Sample rate: 64.000 Number of channels: 16 DBE type: DBBC_DDC Speedup factor: 1.00 Disk used to record data. 1st LO= 4200.00 4200.00 4200.00 4200.00 4200.00 4200.00 4200.00 4200.00 4200.00 4200.00 4200.00 4200.00 4200.00 4200.00 4200.00 4200.00 Net SB= L L U U L L U U L L U U L L U U IF SB = U U U U U U U U U U U U U U U U Pol. = RCP LCP RCP LCP RCP LCP RCP LCP RCP LCP RCP LCP RCP LCP RCP LCP BBC = 1 5 1 5 2 6 2 6 3 7 3 7 4 8 4 8 BBC SB= L L U U L L U U L L U U L L U U IF = A4 B3 A4 B3 A4 B3 A4 B3 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= 4830.49 4830.49 4830.49 4830.49 4894.49 4894.49 4894.49 4894.49 4958.49 4958.49 4958.49 4958.49 5022.49 5022.49 5022.49 5022.49 BBC fr= 630.49 630.49 630.49 630.49 694.49 694.49 694.49 694.49 758.49 758.49 758.49 758.49 822.49 822.49 822.49 822.49 Bandwd= 32.00 32.00 32.00 32.00 32.00 32.00 32.00 32.00 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, 9, 10, 11, 12, 13, 14, 15, 16 barrel=roll_off POSITIONS OF SOURCES USED IN RECORDING SCANS Source Source position (RA/Dec) Error (B1950) (J2000) (Date) (mas) * GRS1915 19 12 49.958613 * 19 15 11.544821 19 16 12.613599 0.00 GRS1915+105 10 51 26.57111 * 10 56 44.62477 10 58 57.34646 0.00 From catalog imbedded in main SCHED input file. * J1913+0932 19 11 00.869981 * 19 13 24.025348 19 14 25.756814 0.00 09 27 34.81592 * 09 32 45.37648 09 34 55.17469 0.00 From catalog imbedded in main SCHED input file. 1758+388 17 58 44.703954 * 18 00 24.765363 18 01 08.766849 0.01 * J1800+3848 38 48 32.47350 * 38 48 30.69748 38 48 27.99045 0.01 J1800+38 /home/guest/rmc/SCHED/sched11.6/catalogs/sources.gsfc GSFC 2016a X/S astro solution, 5095 observations. 1903+097 19 03 17.231910 * 19 05 39.898972 19 06 41.444755 0.13 * J1905+0952 09 47 30.15815 * 09 52 08.40750 09 54 04.60661 0.22 /home/guest/rmc/SCHED/sched11.6/catalogs/sources.gsfc GSFC 2016a X/S astro solution, 104 observations. 3C454.3 22 51 29.519739 * 22 53 57.747939 22 55 00.676644 0.65 * J2253+1608 15 52 54.34808 * 16 08 53.56091 16 15 33.13978 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 GRS1915 sess221.C2048 1 2 3 4 5 6 7 8 9 10 11 12 + 3.908 526.698 J1913+0932 sess221.C2048 1 2 3 4 5 6 7 8 9 10 11 12 + 0.433 53.886 J1800+3848 sess221.C2048 1 2 3 4 5 6 7 8 9 10 11 12 + 0.167 23.790 J1905+0952 sess221.C2048 1 2 3 4 5 6 7 8 9 10 11 12 + 2.853 368.153 J2253+1608 sess221.C2048 1 2 3 4 5 6 8 9 10 11 12 15 0.108 8.729 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) GRS1915 138.8 J1913+0932 140.2 J1800+3848 117.7 J1905+0952 140.9 J2253+1608 94.1 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