COVER INFORMATION Station: BADARY (Code Bd ) 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 BADARY (Code Bd ) 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: 330.49 330.49 330.49 330.49 394.49 394.49 394.49 394.49 458.49 458.49 458.49 458.49 522.49 522.49 522.49 522.49 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 22 00 25 47.3 636.8 4.0 52.1 0 0 21 30 00 21 35 00 =1758+388 22 05 26 46.5 637.7 4.1 51.9 300 77 21 30 01 21 37 00 J1905+0952 22 07 26 34.4 597.9 3.0 32.1 55 77 21 37 00 21 39 30 =1903+097 22 09 56 34.1 598.5 3.1 32.4 150 115 21 37 01 21 39 30 GRS1915 22 09 56 36.2 596.8 2.9 31.8 -18 115 No stop 21 43 00 --- 22 13 27 35.8 597.7 3.0 32.2 192 169 21 39 31 21 43 40 J1905+0952 22 14 07 33.5 599.5 3.1 32.8 22 169 21 43 40 21 45 30 =1903+097 22 15 57 33.3 600.0 3.2 33.0 110 197 21 43 41 21 45 30 GRS1915 22 15 57 35.4 598.3 3.0 32.4 -18 197 No stop 21 49 00 --- 22 19 28 35.0 599.2 3.1 32.8 192 251 21 45 31 21 49 00 J1905+0952 22 19 28 32.8 600.9 3.2 33.3 -18 251 No stop 21 51 30 =1903+097 22 21 58 32.4 601.5 3.3 33.5 132 290 21 49 01 21 51 30 GRS1915 22 21 58 34.6 599.8 3.1 33.0 -18 290 No stop 21 55 00 --- 22 25 29 34.2 600.7 3.2 33.3 192 344 21 51 31 21 55 40 J1905+0952 22 26 09 31.9 602.5 3.3 33.9 22 344 21 55 40 21 57 30 =1903+097 22 27 59 31.6 602.9 3.4 34.0 110 372 21 55 41 21 57 30 GRS1915 22 27 59 33.8 601.3 3.2 33.6 -18 372 No stop 22 01 00 --- 22 31 30 33.3 602.2 3.3 33.9 192 426 21 57 31 22 01 00 J1905+0952 22 31 30 31.1 603.8 3.4 34.3 -18 426 No stop 22 03 30 =1903+097 22 34 00 30.8 604.4 3.5 34.5 132 464 22 01 01 22 03 30 GRS1915 22 34 00 33.0 602.8 3.3 34.1 -18 464 No stop 22 07 00 --- 22 37 31 32.5 603.6 3.4 34.4 192 518 22 03 31 22 07 40 J1905+0952 22 38 11 30.2 605.3 3.5 34.8 22 518 22 07 40 22 09 30 =1903+097 22 40 01 29.9 605.8 3.6 34.9 110 546 22 07 41 22 09 30 GRS1915 22 40 01 32.2 604.2 3.4 34.6 -18 546 No stop 22 13 00 --- 22 43 32 31.7 605.1 3.5 34.9 192 600 22 09 31 Schedule for BADARY (Code Bd ) 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 22 43 32 29.4 606.6 3.6 35.2 -18 600 No stop 22 15 30 =1903+097 22 46 02 29.1 607.2 3.7 35.4 132 638 22 13 01 22 15 30 GRS1915 22 46 02 31.3 605.7 3.5 35.1 -18 638 No stop 22 19 00 --- 22 49 33 30.8 606.5 3.6 35.3 192 692 22 15 31 22 19 40 J1905+0952 22 50 13 28.5 608.1 3.7 35.7 22 692 22 19 40 22 21 30 =1903+097 22 52 03 28.2 608.5 3.8 35.8 110 721 22 19 41 22 21 30 GRS1915 22 52 03 30.5 607.1 3.6 35.5 -18 721 No stop 22 25 00 --- 22 55 34 30.0 607.9 3.7 35.7 192 774 22 21 31 22 25 00 J1905+0952 22 55 34 27.7 609.3 3.8 36.0 -19 774 No stop 22 27 30 =1903+097 22 58 04 27.4 609.9 3.9 36.1 131 813 22 25 01 22 27 30 GRS1915 22 58 04 29.6 608.5 3.7 35.9 -18 813 No stop 22 31 00 --- 23 01 35 29.1 609.3 3.8 36.1 192 867 22 27 31 22 31 40 J1905+0952 23 02 15 26.7 610.8 3.9 36.4 21 867 22 31 40 22 33 30 =1903+097 23 04 05 26.5 611.2 4.0 36.5 110 895 22 31 41 22 33 30 J1913+0932 23 04 05 27.3 609.3 3.8 35.9 -17 895 No stop 22 37 00 --- 23 07 36 26.8 610.1 3.9 36.2 193 949 22 33 31 22 38 00 J1905+0952 23 08 36 25.8 612.2 4.0 36.7 42 949 22 38 00 22 40 30 =1903+097 23 11 06 25.4 612.8 4.1 36.9 150 987 22 38 01 22 40 30 GRS1915 23 11 06 27.7 611.4 3.9 36.7 -18 987 No stop 22 44 00 --- 23 14 37 27.2 612.2 4.0 36.9 192 1041 22 40 31 22 44 00 J1905+0952 23 14 37 24.9 613.5 4.1 37.0 -19 1041 No stop 22 46 30 =1903+097 23 17 07 24.6 614.1 4.2 37.2 131 1079 22 44 01 22 46 30 GRS1915 23 17 07 26.8 612.7 4.0 37.0 -18 1079 No stop 22 50 00 --- 23 20 38 26.3 613.5 4.1 37.2 192 1133 22 46 31 22 50 40 J1905+0952 23 21 18 23.9 615.0 4.2 37.4 21 1133 22 50 40 22 52 30 =1903+097 23 23 08 23.7 615.4 4.3 37.4 110 1162 22 50 41 22 52 30 GRS1915 23 23 08 25.9 614.0 4.1 37.3 -18 1162 No stop 22 56 00 --- 23 26 39 25.4 614.8 4.2 37.5 192 1215 22 52 31 22 56 00 J1905+0952 23 26 39 23.1 616.1 4.3 37.6 -19 1215 No stop 22 58 30 =1903+097 23 29 09 22.8 616.6 4.4 37.7 131 1254 22 56 01 Schedule for BADARY (Code Bd ) 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 23 29 09 25.0 615.3 4.2 37.6 -18 1254 No stop 23 02 00 --- 23 32 40 24.5 616.1 4.3 37.7 192 1308 22 58 31 23 02 40 J1905+0952 23 33 20 22.1 617.5 4.4 37.8 21 1308 23 02 40 23 04 30 =1903+097 23 35 10 21.8 617.9 4.5 37.9 110 1336 23 02 41 23 04 30 GRS1915 23 35 10 24.1 616.6 4.3 37.8 -18 1336 No stop 23 08 00 --- 23 38 41 23.6 617.4 4.4 38.0 192 1390 23 04 31 23 08 00 J1905+0952 23 38 41 21.3 618.6 4.5 38.0 -19 1390 No stop 23 10 30 =1903+097 23 41 11 20.9 619.2 4.6 38.1 131 1428 23 08 01 23 10 30 GRS1915 23 41 11 23.2 617.9 4.4 38.0 -18 1428 No stop 23 14 00 --- 23 44 42 22.7 618.6 4.5 38.2 192 1482 23 10 31 23 14 40 J1905+0952 23 45 22 20.3 620.0 4.6 38.2 21 1482 23 14 40 23 16 30 =1903+097 23 47 12 20.0 620.4 4.7 38.3 110 1510 23 14 41 23 16 30 GRS1915 23 47 12 22.3 619.2 4.5 38.3 -18 1510 No stop 23 20 00 --- 23 50 43 21.8 619.9 4.6 38.4 192 1564 23 16 31 23 20 00 J1905+0952 23 50 43 19.5 621.1 4.7 38.4 -19 1564 No stop 23 22 30 =1903+097 23 53 13 19.1 621.6 4.8 38.4 131 1603 23 20 01 23 22 30 GRS1915 23 53 13 21.4 620.4 4.6 38.4 -18 1603 No stop 23 26 00 --- 23 56 44 20.9 621.1 4.7 38.5 192 1656 23 22 31 23 26 40 J1905+0952 23 57 24 18.5 622.5 4.8 38.5 21 1656 23 26 40 23 28 30 =1903+097 23 59 14 18.2 622.9 4.9 38.6 110 1685 23 26 41 23 28 30 GRS1915 23 59 14 20.5 621.6 4.7 38.6 -18 1685 No stop 23 32 00 --- 00 02 45 19.9 622.4 4.8 38.7 192 1738 23 28 31 23 32 00 J1905+0952 00 02 45 17.6 623.6 4.9 38.6 -19 1738 No stop 23 34 30 =1903+097 00 05 15 17.2 624.1 5.0 38.7 131 1777 23 32 01 23 34 30 J1913+0932 00 05 15 18.2 622.3 4.8 38.5 -17 1777 No stop 23 38 00 --- 00 08 46 17.7 623.0 4.9 38.5 193 1831 23 34 31 23 39 00 J1905+0952 00 09 46 16.6 625.0 5.1 38.7 43 1831 23 39 00 23 41 30 =1903+097 00 12 16 16.2 625.5 5.1 38.8 150 1869 23 39 01 23 41 30 GRS1915 00 12 16 18.5 624.3 4.9 38.8 -18 1869 No stop 23 45 00 --- 00 15 47 17.9 625.0 5.0 38.9 192 1923 23 41 31 Schedule for BADARY (Code Bd ) Page 5 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 --- 23 45 00 J1905+0952 00 15 47 15.6 626.2 5.2 38.8 -19 1923 No stop 23 47 30 =1903+097 00 18 17 15.2 626.7 5.2 38.8 131 1962 23 45 01 23 47 30 GRS1915 00 18 17 17.6 625.5 5.0 38.9 -18 1962 No stop 23 51 00 --- 00 21 48 17.0 626.2 5.1 39.0 192 2015 23 47 31 23 51 40 J1905+0952 00 22 28 14.6 627.5 5.3 38.9 21 2015 23 51 40 23 53 30 =1903+097 00 24 18 14.3 627.9 5.3 38.9 110 2044 23 51 41 23 53 30 GRS1915 00 24 18 16.6 626.7 5.1 39.0 -18 2044 No stop 23 57 00 --- 00 27 49 16.1 627.4 5.2 39.0 192 2097 23 53 31 23 57 00 J1905+0952 00 27 49 13.8 628.6 5.4 38.9 -19 2097 No stop 23 59 30 =1903+097 00 30 19 13.4 629.1 5.4 38.9 131 2136 23 57 01 --- Start: Wed 16 Jun 2021 Day 167 -- Stop: Thu 17 Jun 2021 Day 168 --- 23 59 30 GRS1915 00 30 19 15.7 627.9 5.2 39.0 -18 2136 No stop 00 03 00 --- 00 33 50 15.1 628.6 5.3 39.1 192 2190 23 59 31 00 03 40 J1905+0952 00 34 30 12.7 629.9 5.5 38.9 21 2190 00 03 40 00 05 30 =1903+097 00 36 20 12.4 630.2 5.5 38.9 110 2218 00 03 41 00 05 30 GRS1915 00 36 20 14.8 629.1 5.3 39.1 -18 2218 No stop 00 09 00 --- 00 39 51 14.2 629.8 5.4 39.1 192 2272 00 05 31 00 09 00 J1905+0952 00 39 51 11.9 630.9 5.6 38.9 -19 2272 No stop 00 11 30 =1903+097 00 42 21 11.5 631.4 5.6 38.9 131 2310 00 09 01 00 11 30 GRS1915 00 42 21 13.8 630.3 5.4 39.1 -18 2310 No stop 00 15 00 --- 00 45 52 13.3 630.9 5.5 39.1 192 2364 00 11 31 00 15 40 J1905+0952 00 46 32 10.9 632.2 5.7 38.9 21 2364 00 15 40 00 17 30 =1903+097 00 48 22 10.6 632.6 5.7 38.9 110 2392 00 15 41 00 17 30 GRS1915 00 48 22 12.9 631.4 5.5 39.1 -18 2392 No stop 00 21 00 --- 00 51 53 12.4 632.1 5.6 39.0 192 2446 00 17 31 00 21 00 J1905+0952 00 51 53 10.0 633.3 5.8 38.8 -19 2446 No stop 00 23 30 =1903+097 00 54 23 9.7 633.8 5.8 D 38.8 0 2485 00 21 01 00 23 30 GRS1915 00 54 23 12.0 632.6 5.6 39.0 -17 2485 No stop 00 27 00 --- 00 57 54 11.4 633.3 5.7 39.0 193 2538 00 23 31 Schedule for BADARY (Code Bd ) Page 6 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 ---------------------------------------------------------------------------------------- --- Thu 17 Jun 2021 Day 168 --- 00 29 30 GRS1915 01 00 24 11.0 633.8 5.7 39.0 144 2538 00 29 30 00 33 00 --- 01 03 55 10.5 634.5 5.8 38.9 210 2592 00 29 31 01 42 00 J1800+3848 02 13 06 13.3 677.8 8.2 32.2 4083 2592 01 42 00 01 47 00 =1758+388 02 18 07 12.8 678.7 8.3 31.6 300 2669 01 42 01 SETUP FILE INFORMATION: NOTE: If DOPPLER, FREQ, or BW were used, see the individual scans for the final BBC settings. ======== Setup file: sess221.C2048 Matching groups in /home/guest/rmc/SCHED/sched11.6/catalogs/freq_RDBE.dat: kvzr_c Added by Des Small, 24 February 2012 Setup group: 3 Station: BADARY Total bit rate: 2048 Format: MARK5B Bits per sample: 2 Sample rate: 64.000 Number of channels: 16 DBE type: Speedup factor: 1.00 Disk used to record data. 1st LO= 4500.00 4500.00 4500.00 4500.00 4500.00 4500.00 4500.00 4500.00 4500.00 4500.00 4500.00 4500.00 4500.00 4500.00 4500.00 4500.00 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 9 1 9 2 10 2 10 3 11 3 11 4 12 4 12 BBC SB= L L U U L L U U L L U U L L U U IF = A B A B A B A B A B A B A B A B The following frequency sets based on these setups were used. Frequency Set: 12 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= 330.49 330.49 330.49 330.49 394.49 394.49 394.49 394.49 458.49 458.49 458.49 458.49 522.49 522.49 522.49 522.49 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: 12 13 20 Track assignments are: track1= 18, 26, 2, 10, 20, 28, 4, 12, 22, 30, 6, 14, 24, 32, 8, 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