COVER INFORMATION Station: TIANMA65 (Code T6 ) Experiment: Probing the radio jets in GRS1915+105 in a new puzzling accretion state Exp. Code: EM144A Schedule Version: 2.50 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 30 Oct 2020 Day 304 --- 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 12 30 00 J1800+3848 23 11 41 27.8 -59.4 5.2 71.0 0 0 12 30 00 12 35 00 =1758+388 23 16 42 26.9 -59.0 5.3 70.4 300 77 12 30 01 12 37 00 J1905+0952 23 18 43 28.1 264.6 4.2 W 59.9 -532 77 12 37 00 12 39 30 =1903+097 23 21 13 27.6 264.9 4.2 W 60.0 0 116 12 37 01 12 39 30 GRS1915 23 21 13 30.2 264.7 4.1 60.3 -12 116 No stop 12 43 00 --- 23 24 43 29.4 265.1 4.1 60.4 198 170 12 39 31 12 43 00 J1905+0952 23 24 43 26.9 265.4 4.3 60.1 -12 170 No stop 12 45 30 =1903+097 23 27 14 26.3 265.7 4.3 60.1 138 209 12 43 01 12 45 30 GRS1915 23 27 14 28.9 265.5 4.2 60.4 -12 209 No stop 12 49 00 --- 23 30 44 28.1 266.0 4.2 60.5 198 263 12 45 31 12 49 40 J1905+0952 23 31 25 25.4 266.3 4.4 60.2 28 263 12 49 40 12 51 30 =1903+097 23 33 15 25.0 266.6 4.4 60.2 110 291 12 49 41 12 51 30 GRS1915 23 33 15 27.6 266.3 4.3 60.5 -12 291 No stop 12 55 00 --- 23 36 45 26.8 266.8 4.3 60.6 198 345 12 51 31 12 55 00 J1905+0952 23 36 45 24.3 267.0 4.5 60.2 -12 345 No stop 12 57 30 =1903+097 23 39 16 23.7 267.4 4.5 60.3 138 384 12 55 01 12 57 30 GRS1915 23 39 16 26.3 267.1 4.4 60.6 -12 384 No stop 13 01 00 --- 23 42 46 25.6 267.6 4.4 60.6 198 438 12 57 31 13 01 40 J1905+0952 23 43 27 22.9 267.9 4.6 60.3 28 438 13 01 40 13 03 30 =1903+097 23 45 17 22.5 268.2 4.6 60.3 110 466 13 01 41 13 03 30 GRS1915 23 45 17 25.0 267.9 4.5 60.7 -12 466 No stop 13 07 00 --- 23 48 47 24.3 268.4 4.5 60.7 198 520 13 03 31 13 07 00 J1905+0952 23 48 47 21.7 268.6 4.7 60.3 -12 520 No stop 13 09 30 =1903+097 23 51 18 21.2 269.0 4.7 60.4 138 559 13 07 01 13 09 30 GRS1915 23 51 18 23.7 268.7 4.6 60.7 -12 559 No stop 13 13 00 --- 23 54 48 23.0 269.2 4.6 60.7 198 613 13 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 ---------------------------------------------------------------------------------------- --- Fri 30 Oct 2020 Day 304 --- 13 13 40 J1905+0952 23 55 29 20.3 269.5 4.8 60.4 28 613 13 13 40 13 15 30 =1903+097 23 57 19 19.9 269.7 4.8 60.4 110 642 13 13 41 13 15 30 GRS1915 23 57 19 22.5 269.5 4.7 60.7 -12 642 No stop 13 19 00 --- 00 00 49 21.7 270.0 4.7 60.7 198 696 13 15 31 13 19 00 J1905+0952 00 00 49 19.1 270.2 4.9 60.4 -12 696 No stop 13 21 30 =1903+097 00 03 20 18.6 270.5 4.9 60.4 138 734 13 19 01 13 21 30 GRS1915 00 03 20 21.2 270.3 4.8 60.7 -12 734 No stop 13 25 00 --- 00 06 50 20.4 270.7 4.8 60.7 198 788 13 21 31 13 25 40 J1905+0952 00 07 31 17.7 271.1 5.0 60.4 28 788 13 25 40 13 27 30 =1903+097 00 09 21 17.3 271.3 5.0 60.4 110 817 13 25 41 13 27 30 J1913+0932 00 09 21 18.8 270.0 4.9 60.3 -8 817 No stop 13 30 00 --- 00 11 51 18.3 270.3 5.0 60.3 142 855 13 27 31 13 30 40 J1905+0952 00 12 31 16.6 271.7 5.1 60.3 32 855 13 30 40 13 32 40 =1903+097 00 14 32 16.2 271.9 5.1 60.3 120 886 13 30 41 13 32 40 GRS1915 00 14 32 18.8 271.7 5.0 60.7 -12 886 No stop 13 36 10 --- 00 18 02 18.0 272.2 5.0 60.7 198 940 13 32 41 13 36 10 J1905+0952 00 18 02 15.4 272.4 5.2 60.3 -12 940 No stop 13 38 40 =1903+097 00 20 33 14.9 272.7 5.2 60.3 138 979 13 36 11 13 38 40 GRS1915 00 20 33 17.5 272.5 5.1 60.6 -12 979 No stop 13 42 10 --- 00 24 03 16.7 272.9 5.1 60.6 198 1033 13 38 41 13 42 50 J1905+0952 00 24 43 14.0 273.2 5.3 60.2 28 1033 13 42 50 13 44 40 =1903+097 00 26 34 13.6 273.5 5.3 60.2 110 1061 13 42 51 13 44 40 GRS1915 00 26 34 16.2 273.2 5.2 60.6 -12 1061 No stop 13 48 10 --- 00 30 04 15.4 273.7 5.2 60.5 198 1116 13 44 41 13 48 10 J1905+0952 00 30 04 12.9 273.9 5.4 60.1 -12 1116 No stop 13 50 40 =1903+097 00 32 35 12.3 274.2 5.4 60.1 138 1154 13 48 11 13 50 40 GRS1915 00 32 35 14.9 274.0 5.3 60.5 -12 1154 No stop 13 54 10 --- 00 36 05 14.2 274.4 5.3 60.4 198 1208 13 50 41 13 54 50 J1905+0952 00 36 45 11.4 274.7 5.5 60.0 28 1208 13 54 50 13 56 40 =1903+097 00 38 36 11.1 275.0 5.5 60.0 110 1237 13 54 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 30 Oct 2020 Day 304 --- 13 56 40 GRS1915 00 38 36 13.6 274.7 5.4 60.4 -12 1237 No stop 14 00 10 --- 00 42 06 12.9 275.2 5.4 60.3 198 1291 13 56 41 14 00 10 J1905+0952 00 42 06 10.3 275.4 5.6 59.9 -12 1291 No stop 14 02 40 =1903+097 00 44 37 9.8 275.7 5.6 59.9 138 1329 14 00 11 14 02 40 GRS1915 00 44 37 12.3 275.5 5.5 60.3 -12 1329 No stop 14 06 10 --- 00 48 07 11.6 275.9 5.5 60.2 198 1384 14 02 41 14 06 50 J1905+0952 00 48 47 8.9 276.3 5.7 59.8 28 1384 14 06 50 14 08 40 =1903+097 00 50 38 8.5 276.5 5.7 59.7 110 1412 14 06 51 14 08 40 GRS1915 00 50 38 11.1 276.2 5.6 60.1 -12 1412 No stop 14 12 10 --- 00 54 08 10.3 276.7 5.6 60.0 198 1466 14 08 41 14 12 10 J1905+0952 00 54 08 7.7 276.9 5.8 59.6 -12 1466 No stop 14 14 40 =1903+097 00 56 39 7.2 277.2 5.8 59.6 138 1505 14 12 11 14 14 40 GRS1915 00 56 39 9.8 277.0 5.7 60.0 -12 1505 No stop 14 18 10 --- 01 00 09 9.0 277.4 5.7 59.9 198 1559 14 14 41 14 20 40 J1913+0932 01 02 40 7.4 276.8 5.8 59.6 144 1559 14 20 40 14 23 10 --- 01 05 10 6.9 277.1 5.8 D 59.5 0 1597 14 20 41 14 25 50 GRS1915 01 07 50 7.4 278.4 5.9 59.7 154 1597 14 25 50 14 29 20 --- 01 11 21 6.7 278.8 5.9 D 59.5 0 1651 14 25 51 SETUP FILE INFORMATION: NOTE: If DOPPLER, FREQ, or BW were used, see the individual scans for the final BBC settings. ======== Setup file: sess320.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 08.946282 0.00 GRS1915+105 10 51 26.57111 * 10 56 44.62477 10 59 05.89093 0.00 From catalog imbedded in main SCHED input file. * J1913+0932 19 11 00.869981 * 19 13 24.025348 19 14 22.061653 0.00 09 27 34.81592 * 09 32 45.37648 09 35 03.19161 0.00 From catalog imbedded in main SCHED input file. 1758+388 17 58 44.703954 * 18 00 24.765363 18 01 04.600553 0.01 * J1800+3848 38 48 32.47350 * 38 48 30.69748 38 48 44.84096 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 37.696026 0.13 * J1905+0952 09 47 30.15815 * 09 52 08.40750 09 54 13.05426 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 59.130379 0.65 * J2253+1608 15 52 54.34808 * 16 08 53.56091 16 15 37.30815 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 sess320.C2048 1 2 3 4 5 6 7 8 9 10 11 14 3.967 475.462 J1913+0932 sess320.C2048 1 2 3 4 5 6 7 8 9 10 11 14 0.375 40.584 J1800+3848 sess320.C2048 1 2 3 4 5 6 7 8 9 10 11 14 0.167 21.144 J1905+0952 sess320.C2048 1 2 3 4 5 6 7 8 9 10 11 14 2.850 343.015 J2253+1608 sess320.C2048 1 2 3 4 5 7 8 9 10 11 14 0.100 9.530 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 77.2 J1913+0932 76.4 J1800+3848 73.6 J1905+0952 74.7 J2253+1608 130.3 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