COVER INFORMATION Station: VLBA_BR (Code Br ) Experiment: Confirming the first detection of a merging dual SMBH system at high-z Exp. Code: gs044a Schedule Version: 2.00 Processed by SCHED version: 11.50 Development version 11.5. Started Apr. 2 PI: Cristiana Spingola Address: University of Bologna - INAF-IRA via Gobetti 101 40129 Bologna Italy Phone: +39 3938231373 EMAIL: spingola@ira.inaf.it Fax: Phone during observation: Observing mode: Notes: v2: T6 IF C->B, BBC 9-12 -> 5-8 Ar confirms BBC tunings for their RDBE COVER LETTER: Schedule for VLBA_BR (Code Br ) Page 2 Confirming the first detection of a merging dual SMBH system at high-z 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 ---------------------------------------------------------------------------------------- --- Sat 26 Oct 2019 Day 299 --- Next scan frequencies: 4860.25 4860.25 4892.25 4892.25 4924.25 4924.25 4956.25 4956.25 Next BBC frequencies: 760.25 760.25 792.25 792.25 824.25 824.25 856.25 856.25 Next scan bandwidths: 32.00 32.00 32.00 32.00 32.00 32.00 32.00 32.00 19 19 20 MG2016 13 40 06 2.0 74.9 -6.7 D -41.1 0 0 19 19 20 19 22 50 --- 13 43 37 2.6 75.5 -6.6 H -41.3 0 27 19 19 21 19 24 20 MG2016 13 45 07 2.8 75.8 -6.6 H -41.3 84 27 19 24 20 19 27 50 --- 13 48 38 3.4 76.5 -6.5 H -41.5 0 54 19 24 21 19 36 10 MG2016 13 56 59 4.7 78.0 -6.4 H -41.8 494 54 19 36 10 19 39 40 --- 14 00 30 5.3 78.6 -6.3 -41.9 0 81 19 36 11 19 39 40 J2018+0831 14 00 30 3.3 80.8 -6.3 H -41.8 -12 81 19 39 52 19 41 10 --- 14 02 00 3.6 81.1 -6.3 H -41.8 0 91 19 39 41 19 41 10 MG2016 14 02 00 5.6 78.9 -6.3 -41.9 -12 91 19 41 22 19 44 40 --- 14 05 31 6.1 79.6 -6.2 -42.1 198 117 19 41 11 19 45 20 J2018+0831 14 06 11 4.2 81.9 -6.2 H -41.9 28 117 19 45 20 19 46 20 --- 14 07 11 4.4 82.0 -6.2 H -42.0 0 124 19 45 21 19 46 20 MG2016 14 07 11 6.4 79.9 -6.2 -42.1 -12 124 19 46 32 19 49 50 --- 14 10 41 7.0 80.5 -6.2 -42.2 198 150 19 46 21 19 49 50 J2018+0831 14 10 41 5.0 82.7 -6.1 H -42.0 -12 150 19 50 02 19 51 20 --- 14 12 12 5.2 83.0 -6.1 -42.1 0 160 19 49 51 19 51 20 MG2016 14 12 12 7.2 80.8 -6.1 -42.2 -12 160 19 51 32 19 54 50 --- 14 15 42 7.8 81.4 -6.1 -42.3 198 185 19 51 21 19 55 30 J2018+0831 14 16 22 5.9 83.7 -6.0 -42.1 28 185 19 55 30 19 56 30 --- 14 17 23 6.1 83.9 -6.0 -42.2 60 193 19 55 31 19 56 30 MG2016 14 17 23 8.1 81.7 -6.0 -42.4 -12 193 19 56 42 20 00 00 --- 14 20 53 8.7 82.4 -6.0 -42.5 198 219 19 56 31 20 00 00 J2018+0831 14 20 53 6.7 84.6 -6.0 -42.2 -12 219 20 00 12 20 01 30 --- 14 22 23 6.9 84.8 -5.9 -42.2 78 229 20 00 01 20 01 30 MG2016 14 22 23 8.9 82.6 -6.0 -42.5 -12 229 20 01 42 20 05 00 --- 14 25 54 9.5 83.3 -5.9 -42.6 198 254 20 01 31 20 05 40 J2018+0831 14 26 34 7.6 85.6 -5.9 -42.3 28 254 20 05 40 20 06 40 --- 14 27 34 7.8 85.8 -5.9 -42.3 60 262 20 05 41 Schedule for VLBA_BR (Code Br ) Page 3 Confirming the first detection of a merging dual SMBH system at high-z 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 ---------------------------------------------------------------------------------------- --- Sat 26 Oct 2019 Day 299 --- 20 06 40 MG2016 14 27 34 9.8 83.6 -5.9 -42.6 -12 262 20 06 52 20 10 10 --- 14 31 05 10.4 84.2 -5.8 -42.7 198 288 20 06 41 20 10 10 J2018+0831 14 31 05 8.4 86.4 -5.8 -42.4 -12 288 20 10 22 20 11 40 --- 14 32 35 8.6 86.7 -5.8 -42.4 78 298 20 10 11 20 11 40 MG2016 14 32 35 10.6 84.5 -5.8 -42.7 -12 298 20 11 52 20 15 10 --- 14 36 06 11.2 85.2 -5.7 -42.7 198 323 20 11 41 20 15 50 J2018+0831 14 36 46 9.3 87.5 -5.7 -42.4 28 323 20 15 50 20 16 50 --- 14 37 46 9.5 87.7 -5.7 -42.4 60 331 20 15 51 20 16 50 MG2016 14 37 46 11.5 85.5 -5.7 -42.8 -12 331 20 17 02 20 20 20 --- 14 41 17 12.0 86.1 -5.6 -42.8 198 356 20 16 51 20 20 20 J2018+0831 14 41 17 10.1 88.3 -5.6 -42.4 -12 356 20 20 32 20 21 50 --- 14 42 47 10.3 88.6 -5.6 -42.4 78 366 20 20 21 20 21 50 MG2016 14 42 47 12.3 86.4 -5.6 -42.8 -12 366 20 22 02 20 25 20 --- 14 46 17 12.9 87.0 -5.6 -42.9 198 392 20 21 51 20 26 00 J2018+0831 14 46 57 11.0 89.4 -5.5 -42.5 28 392 20 26 00 20 27 00 --- 14 47 58 11.2 89.6 -5.5 -42.5 60 400 20 26 01 20 27 00 MG2016 14 47 58 13.2 87.3 -5.5 -42.9 -12 400 20 27 12 20 30 30 --- 14 51 28 13.7 88.0 -5.5 -42.9 198 425 20 27 01 20 30 30 J2018+0831 14 51 28 11.8 90.2 -5.5 -42.5 -12 425 20 30 42 20 32 00 --- 14 52 58 12.0 90.5 -5.4 -42.5 78 435 20 30 31 20 32 00 MG2016 14 52 58 14.0 88.3 -5.5 -42.9 -12 435 20 32 12 20 35 30 --- 14 56 29 14.6 88.9 -5.4 -42.9 198 461 20 32 01 20 36 10 J2018+0831 14 57 09 12.7 91.3 -5.4 -42.4 28 461 20 36 10 20 37 10 --- 14 58 09 12.9 91.5 -5.3 -42.4 60 468 20 36 11 20 37 10 MG2016 14 58 09 14.9 89.2 -5.4 -42.9 -12 468 20 37 22 20 40 40 --- 15 01 40 15.4 89.9 -5.3 -42.9 198 494 20 37 11 20 41 20 J2018+0831 15 02 20 13.6 92.3 -5.3 -42.4 28 494 20 41 20 20 42 20 --- 15 03 20 13.8 92.4 -5.3 -42.4 60 502 20 41 21 20 42 20 MG2016 15 03 20 15.7 90.2 -5.3 -42.9 -12 502 20 42 32 20 45 50 --- 15 06 51 16.3 90.8 -5.2 -42.9 198 527 20 42 21 Schedule for VLBA_BR (Code Br ) Page 4 Confirming the first detection of a merging dual SMBH system at high-z 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 ---------------------------------------------------------------------------------------- --- Sat 26 Oct 2019 Day 299 --- 20 45 50 J2018+0831 15 06 51 14.3 93.1 -5.2 -42.4 -12 527 20 46 02 20 47 20 --- 15 08 21 14.6 93.4 -5.2 -42.4 78 537 20 45 51 20 47 20 MG2016 15 08 21 16.6 91.1 -5.2 -42.9 -12 537 20 47 32 20 50 50 --- 15 11 52 17.1 91.8 -5.1 -42.9 198 563 20 47 21 20 51 30 J2018+0831 15 12 32 15.3 94.2 -5.1 -42.3 28 563 20 51 30 20 52 30 --- 15 13 32 15.5 94.4 -5.1 -42.3 60 570 20 51 31 20 52 30 MG2016 15 13 32 17.4 92.1 -5.1 -42.9 -12 570 20 52 42 20 56 00 --- 15 17 02 18.0 92.8 -5.1 -42.9 198 596 20 52 31 20 56 30 J2018+0831 15 17 32 16.1 95.1 -5.0 -42.2 18 596 20 56 30 21 00 00 --- 15 21 03 16.7 95.8 -5.0 -42.2 210 623 20 56 31 SETUP FILE INFORMATION: NOTE: If DOPPLER, FREQ, or BW were used, see the individual scans for the final BBC settings. ======== Setup file: sess319.C1024glob Matching groups in /home/guest/rmc/SCHED/sched11.5/catalogs/freq_RDBE.dat: vc_d Setup group: 10 Station: VLBA_BR Total bit rate: 1024 Format: VDIF Bits per sample: 2 Sample rate: 64.000 Number of channels: 8 DBE type: RDBE_DDC Speedup factor: 1.00 Disk used to record data. 1st LO= 4100.00 4100.00 4100.00 4100.00 4100.00 4100.00 4100.00 4100.00 Net SB= U U U U U U U U IF SB = U U U U U U U U Pol. = RCP LCP RCP LCP RCP LCP RCP LCP BBC = 1 2 3 4 5 6 7 8 BBC SB= U U U U U U U U IF = A C A C A C A C VLBA FE= 6cm omit 6cm omit VLBA Synth= 13.6 4.1 13.6 The following frequency sets based on these setups were used. See the crd files for VLBA legacy system setups and pcal detection details. Frequency Set: 15 Setup file default. Used with PCAL = off LO sum= 4860.25 4860.25 4892.25 4892.25 4924.25 4924.25 4956.25 4956.25 BBC fr= 760.25 760.25 792.25 792.25 824.25 824.25 856.25 856.25 Bandwd= 32.00 32.00 32.00 32.00 32.00 32.00 32.00 32.00 VLBA legacy crd files using 4 channels based on RDBE channels: 3 4 5 6 CRD fr= 800.25 800.25 832.25 832.25 CRD bw= 16.00 16.00 16.00 16.00 Matching frequency sets: 15 16 18 19 20 21 22 23 24 Track assignments are: track1= 1, 2, 3, 4, 5, 6, 7, 8 barrel=roll_off POSITIONS OF SOURCES USED IN RECORDING SCANS Source Source position (RA/Dec) Error (B1950) (J2000) (Date) (mas) * MG2016 20 16 55.378166 * 20 19 18.092000 20 20 13.565900 0.00 11 17 44.97966 * 11 27 13.00000 11 31 08.04992 0.00 From catalog imbedded in main SCHED input file. * 3C345 16 41 17.606162 * 16 42 58.809900 16 43 36.764649 0.00 39 54 10.81394 * 39 48 36.99300 39 46 42.73413 0.00 From catalog imbedded in main SCHED input file. * J2018+0831 20 15 45.733430 * 20 18 11.311946 20 19 07.886706 0.00 08 22 30.62230 * 08 31 54.54739 08 35 47.14317 0.00 From catalog imbedded in main SCHED input file. 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 MG2016 sess319.C1024glob 1 2 3 4 5 6 7 8 9 10 11 15 + 6.650 489.300 3C345 sess319.C1024glob 1 2 3 4 5 6 7 8 9 10 11 0.225 6.793 J2018+0831 sess319.C1024glob 1 2 3 4 5 6 7 8 9 10 11 15 + 2.525 164.241 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) MG2016 96.6 3C345 64.2 J2018+0831 95.8 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