COVER INFORMATION Station: TIANMA65 (Code T6 ) Experiment: Probing the radio jets in GRS1915+105 in a new puzzling accretion state Exp. Code: EM144B Schedule Version: 2.40 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 ---------------------------------------------------------------------------------------- --- Fri 5 Mar 2021 Day 64 --- 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 04 00 00 J1800+3848 22 57 04 30.5 -60.4 4.9 72.8 0 0 04 00 00 04 05 00 =1758+388 23 02 04 29.6 -60.1 5.0 72.2 300 77 04 00 01 04 07 00 J1905+0952 23 04 05 31.2 262.5 4.0 W 59.5 -530 77 04 07 00 04 09 30 =1903+097 23 06 35 30.7 262.8 4.0 W 59.6 0 116 04 07 01 04 09 30 GRS1915 23 06 35 33.3 262.5 3.8 59.9 -12 116 No stop 04 13 00 --- 23 10 06 32.5 263.1 3.9 60.0 198 170 04 09 31 04 13 00 J1905+0952 23 10 06 30.0 263.3 4.1 59.7 -12 170 No stop 04 15 30 =1903+097 23 12 36 29.4 263.7 4.1 59.8 138 209 04 13 01 04 15 30 GRS1915 23 12 36 32.0 263.4 3.9 60.1 -12 209 No stop 04 19 00 --- 23 16 07 31.3 263.9 4.0 60.2 198 263 04 15 31 04 19 40 J1905+0952 23 16 47 28.5 264.3 4.2 59.9 28 263 04 19 40 04 21 30 =1903+097 23 18 37 28.2 264.5 4.2 59.9 110 291 04 19 41 04 21 30 GRS1915 23 18 37 30.7 264.3 4.0 60.2 -12 291 No stop 04 25 00 --- 23 22 08 30.0 264.8 4.1 60.3 198 345 04 21 31 04 25 00 J1905+0952 23 22 08 27.4 265.0 4.3 60.0 -12 345 No stop 04 27 30 =1903+097 23 24 38 26.9 265.4 4.3 60.0 138 384 04 25 01 04 27 30 GRS1915 23 24 38 29.4 265.1 4.1 60.4 -12 384 No stop 04 31 00 --- 23 28 09 28.7 265.6 4.2 60.4 198 438 04 27 31 04 31 40 J1905+0952 23 28 49 26.0 266.0 4.4 60.1 28 438 04 31 40 04 33 30 =1903+097 23 30 39 25.6 266.2 4.4 60.2 110 466 04 31 41 04 33 30 GRS1915 23 30 39 28.2 266.0 4.2 60.5 -12 466 No stop 04 37 00 --- 23 34 10 27.4 266.4 4.3 60.5 198 520 04 33 31 04 37 00 J1905+0952 23 34 10 24.8 266.7 4.5 60.2 -12 520 No stop 04 39 30 =1903+097 23 36 40 24.3 267.0 4.5 60.2 138 559 04 37 01 04 39 30 GRS1915 23 36 40 26.9 266.8 4.3 60.6 -12 559 No stop 04 43 00 --- 23 40 11 26.1 267.3 4.4 60.6 198 613 04 39 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 ---------------------------------------------------------------------------------------- --- Fri 5 Mar 2021 Day 64 --- 04 43 40 J1905+0952 23 40 51 23.4 267.6 4.6 60.3 28 613 04 43 40 04 45 30 =1903+097 23 42 41 23.0 267.8 4.6 60.3 110 642 04 43 41 04 45 30 GRS1915 23 42 41 25.6 267.6 4.4 60.6 -12 642 No stop 04 49 00 --- 23 46 12 24.8 268.1 4.5 60.7 198 696 04 45 31 04 49 00 J1905+0952 23 46 12 22.3 268.3 4.7 60.3 -12 696 No stop 04 51 30 =1903+097 23 48 42 21.7 268.6 4.7 60.3 138 734 04 49 01 04 51 30 GRS1915 23 48 42 24.3 268.4 4.5 60.7 -12 734 No stop 04 55 00 --- 23 52 13 23.5 268.8 4.6 60.7 198 788 04 51 31 04 55 40 J1905+0952 23 52 53 20.8 269.2 4.8 60.4 28 788 04 55 40 04 57 30 =1903+097 23 54 43 20.4 269.4 4.8 60.4 110 817 04 55 41 04 57 30 J1913+0932 23 54 43 21.9 268.1 4.7 60.2 -8 817 No stop 05 00 00 --- 23 57 13 21.4 268.4 4.7 60.2 142 855 04 57 31 05 00 40 J1905+0952 23 57 54 19.8 269.8 4.9 60.4 32 855 05 00 40 05 02 40 =1903+097 23 59 54 19.3 270.1 4.9 60.4 120 886 05 00 41 05 02 40 GRS1915 23 59 54 21.9 269.8 4.7 60.7 -12 886 No stop 05 06 10 --- 00 03 24 21.1 270.3 4.8 60.7 198 940 05 02 41 05 06 10 J1905+0952 00 03 24 18.6 270.5 4.9 60.4 -12 940 No stop 05 08 40 =1903+097 00 05 55 18.0 270.8 5.0 60.4 138 979 05 06 11 05 08 40 GRS1915 00 05 55 20.6 270.6 4.8 60.7 -12 979 No stop 05 12 10 --- 00 09 25 19.9 271.1 4.9 60.7 198 1033 05 08 41 05 12 50 J1905+0952 00 10 06 17.1 271.4 5.1 60.3 28 1033 05 12 50 05 14 40 =1903+097 00 11 56 16.8 271.6 5.1 60.3 110 1061 05 12 51 05 14 40 GRS1915 00 11 56 19.3 271.4 4.9 60.7 -12 1061 No stop 05 18 10 --- 00 15 26 18.6 271.8 5.0 60.7 198 1116 05 14 41 05 18 10 J1905+0952 00 15 26 16.0 272.1 5.1 60.3 -12 1116 No stop 05 20 40 =1903+097 00 17 57 15.5 272.4 5.2 60.3 138 1154 05 18 11 05 20 40 GRS1915 00 17 57 18.0 272.2 5.0 60.7 -12 1154 No stop 05 24 10 --- 00 21 27 17.3 272.6 5.1 60.6 198 1208 05 20 41 05 24 50 J1905+0952 00 22 07 14.6 272.9 5.3 60.2 28 1208 05 24 50 05 26 40 =1903+097 00 23 58 14.2 273.1 5.3 60.2 110 1237 05 24 51 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 ---------------------------------------------------------------------------------------- --- Fri 5 Mar 2021 Day 64 --- 05 26 40 GRS1915 00 23 58 16.7 272.9 5.1 60.6 -12 1237 No stop 05 30 10 --- 00 27 28 16.0 273.4 5.2 60.6 198 1291 05 26 41 05 30 10 J1905+0952 00 27 28 13.4 273.6 5.3 60.2 -12 1291 No stop 05 32 40 =1903+097 00 29 59 12.9 273.9 5.4 60.1 138 1329 05 30 11 05 32 40 GRS1915 00 29 59 15.5 273.7 5.2 60.5 -12 1329 No stop 05 36 10 --- 00 33 29 14.7 274.1 5.3 60.5 198 1384 05 32 41 05 36 50 J1905+0952 00 34 09 12.0 274.4 5.5 60.1 28 1384 05 36 50 05 38 40 =1903+097 00 36 00 11.6 274.6 5.5 60.0 110 1412 05 36 51 05 38 40 GRS1915 00 36 00 14.2 274.4 5.3 60.4 -12 1412 No stop 05 42 10 --- 00 39 30 13.4 274.9 5.4 60.4 198 1466 05 38 41 05 42 10 J1905+0952 00 39 30 10.9 275.1 5.5 60.0 -12 1466 No stop 05 44 40 =1903+097 00 42 01 10.3 275.4 5.6 59.9 138 1505 05 42 11 05 44 40 GRS1915 00 42 01 12.9 275.2 5.4 60.3 -12 1505 No stop 05 48 10 --- 00 45 31 12.1 275.6 5.5 60.2 198 1559 05 44 41 05 48 50 J1905+0952 00 46 11 9.4 275.9 5.7 59.8 28 1559 05 48 50 05 50 40 =1903+097 00 48 02 9.0 276.2 5.7 59.8 110 1587 05 48 51 05 50 40 J1913+0932 00 48 02 10.5 274.9 5.6 59.9 -8 1587 No stop 05 53 10 --- 00 50 32 10.0 275.2 5.6 59.9 142 1626 05 50 41 05 53 50 J1905+0952 00 51 12 8.4 276.6 5.7 59.7 32 1626 05 53 50 05 55 50 =1903+097 00 53 13 7.9 276.8 5.8 59.7 120 1657 05 53 51 05 55 50 GRS1915 00 53 13 10.5 276.6 5.6 60.1 -12 1657 No stop 05 59 20 --- 00 56 43 9.8 277.0 5.7 60.0 198 1711 05 55 51 05 59 20 J1905+0952 00 56 43 7.2 277.2 5.8 59.6 -12 1711 No stop 06 01 50 =1903+097 00 59 14 6.7 277.6 5.9 D 59.5 0 1749 05 59 21 06 01 50 GRS1915 00 59 14 9.2 277.3 5.7 59.9 -11 1749 No stop 06 05 20 --- 01 02 44 8.5 277.8 5.8 59.8 199 1803 06 01 51 06 07 50 GRS1915 01 05 15 8.0 278.1 5.8 59.7 148 1803 06 07 50 06 11 20 --- 01 08 45 7.2 278.5 5.9 59.6 210 1858 06 07 51 SETUP FILE INFORMATION: NOTE: If DOPPLER, FREQ, or BW were used, see the individual scans for the final BBC settings. ======== Setup file: sess121.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: 13 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: 6 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: 6 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 09.784147 0.00 GRS1915+105 10 51 26.57111 * 10 56 44.62477 10 58 46.80895 0.00 From catalog imbedded in main SCHED input file. * J1913+0932 19 11 00.869981 * 19 13 24.025348 19 14 22.931578 0.00 09 27 34.81592 * 09 32 45.37648 09 34 44.78753 0.00 From catalog imbedded in main SCHED input file. 1758+388 17 58 44.703954 * 18 00 24.765363 18 01 05.985930 0.01 * J1800+3848 38 48 32.47350 * 38 48 30.69748 38 48 11.69985 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 38.639105 0.13 * J1905+0952 09 47 30.15815 * 09 52 08.40750 09 53 54.19200 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 54 58.214842 0.65 * J2253+1608 15 52 54.34808 * 16 08 53.56091 16 15 26.32748 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 sess121.C2048 1 2 3 4 5 6 7 8 9 10 11 14 3.967 484.265 J1913+0932 sess121.C2048 1 2 3 4 5 6 7 8 9 10 11 14 0.375 42.444 J1800+3848 sess121.C2048 1 2 3 4 5 6 7 8 9 10 11 14 0.167 21.481 J1905+0952 sess121.C2048 1 2 3 4 5 6 7 8 9 10 11 14 2.850 348.727 J2253+1608 sess121.C2048 1 2 3 4 5 7 8 9 10 11 14 0.100 9.360 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 59.3 J1913+0932 59.4 J1800+3848 82.9 J1905+0952 61.3 J2253+1608 22.3 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