COVER INFORMATION Station: VLBA_FD (Code Fd ) 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_FD (Code Fd ) 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 18 38 40 MG2016 14 02 17 2.1 77.8 -6.3 D -59.1 0 0 18 38 40 18 42 10 --- 14 05 48 2.8 78.3 -6.2 H -59.3 0 27 18 38 41 18 43 40 MG2016 14 07 18 3.1 78.4 -6.2 H -59.4 84 27 18 43 40 18 47 10 --- 14 10 48 3.8 78.9 -6.2 H -59.5 0 54 18 43 41 18 47 50 J2018+0831 14 11 29 2.7 81.6 -6.1 H -59.4 30 54 18 47 50 18 48 50 --- 14 12 29 3.0 81.8 -6.1 H -59.5 0 62 18 47 51 18 48 50 MG2016 14 12 29 4.2 79.1 -6.1 -59.6 -11 62 18 49 01 18 52 20 --- 14 15 59 4.9 79.5 -6.1 -59.7 199 87 18 48 51 18 52 20 J2018+0831 14 15 59 3.7 82.2 -6.1 H -59.6 -10 87 18 52 30 18 53 50 --- 14 17 30 4.0 82.4 -6.0 H -59.6 0 98 18 52 21 18 53 50 MG2016 14 17 30 5.3 79.7 -6.0 -59.8 -11 98 18 54 01 18 57 20 --- 14 21 00 6.0 80.2 -6.0 -59.9 199 123 18 53 51 18 58 00 J2018+0831 14 21 40 4.9 82.9 -6.0 -59.7 30 123 18 58 00 18 59 00 --- 14 22 40 5.1 83.0 -5.9 -59.7 60 131 18 58 01 18 59 00 MG2016 14 22 40 6.4 80.4 -6.0 -60.0 -10 131 18 59 10 19 02 30 --- 14 26 11 7.1 80.8 -5.9 -60.1 200 157 18 59 01 19 02 30 J2018+0831 14 26 11 5.9 83.5 -5.9 -59.8 -10 157 19 02 40 19 04 00 --- 14 27 41 6.2 83.7 -5.9 -59.9 80 167 19 02 31 19 04 00 MG2016 14 27 41 7.4 81.0 -5.9 -60.1 -10 167 19 04 10 19 07 30 --- 14 31 12 8.2 81.4 -5.8 -60.3 200 193 19 04 01 19 08 10 J2018+0831 14 31 52 7.1 84.2 -5.8 -60.0 30 193 19 08 10 19 09 10 --- 14 32 52 7.3 84.3 -5.8 -60.0 60 201 19 08 11 19 09 10 MG2016 14 32 52 8.5 81.6 -5.8 -60.3 -10 201 19 09 20 19 12 40 --- 14 36 23 9.3 82.0 -5.7 -60.4 200 226 19 09 11 19 12 40 J2018+0831 14 36 23 8.1 84.7 -5.7 -60.1 -10 226 19 12 50 19 14 10 --- 14 37 53 8.4 84.9 -5.7 -60.1 80 237 19 12 41 19 14 10 MG2016 14 37 53 9.6 82.2 -5.7 -60.5 -10 237 19 14 20 19 17 40 --- 14 41 23 10.3 82.7 -5.6 -60.6 200 263 19 14 11 Schedule for VLBA_FD (Code Fd ) 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 --- 19 18 20 J2018+0831 14 42 04 9.3 85.5 -5.6 -60.2 30 263 19 18 20 19 19 20 --- 14 43 04 9.5 85.6 -5.6 -60.2 60 270 19 18 21 19 19 20 MG2016 14 43 04 10.7 82.9 -5.6 -60.6 -10 270 19 19 30 19 22 50 --- 14 46 34 11.4 83.3 -5.6 -60.7 200 296 19 19 21 19 22 50 J2018+0831 14 46 34 10.2 86.0 -5.5 -60.2 -10 296 19 23 00 19 24 20 --- 14 48 05 10.6 86.2 -5.5 -60.3 80 306 19 22 51 19 24 20 MG2016 14 48 05 11.8 83.5 -5.5 -60.7 -10 306 19 24 30 19 27 50 --- 14 51 35 12.5 83.9 -5.5 -60.8 200 332 19 24 21 19 28 30 J2018+0831 14 52 15 11.5 86.7 -5.4 -60.3 30 332 19 28 30 19 29 30 --- 14 53 15 11.7 86.8 -5.4 -60.3 60 340 19 28 31 19 36 10 MG2016 14 59 56 14.3 84.9 -5.3 -61.0 390 340 19 36 10 19 39 40 --- 15 03 27 15.1 85.4 -5.3 -61.1 210 367 19 36 11 19 39 40 J2018+0831 15 03 27 13.9 88.1 -5.3 -60.4 -10 367 19 39 50 19 41 10 --- 15 04 57 14.2 88.3 -5.2 -60.4 80 377 19 39 41 19 41 10 MG2016 15 04 57 15.4 85.5 -5.3 -61.1 -10 377 19 41 20 19 44 40 --- 15 08 28 16.1 86.0 -5.2 -61.2 200 403 19 41 11 19 45 20 J2018+0831 15 09 08 15.1 88.8 -5.2 -60.5 30 403 19 45 20 19 46 20 --- 15 10 08 15.3 89.0 -5.1 -60.5 60 411 19 45 21 19 46 20 MG2016 15 10 08 16.5 86.2 -5.2 -61.2 -10 411 19 46 30 19 49 50 --- 15 13 39 17.2 86.6 -5.1 -61.2 200 436 19 46 21 19 49 50 J2018+0831 15 13 39 16.1 89.4 -5.1 -60.5 -10 436 19 50 00 19 51 20 --- 15 15 09 16.4 89.6 -5.1 -60.5 80 447 19 49 51 19 51 20 MG2016 15 15 09 17.6 86.8 -5.1 -61.3 -10 447 19 51 30 19 54 50 --- 15 18 40 18.3 87.2 -5.0 -61.3 200 473 19 51 21 19 55 30 J2018+0831 15 19 20 17.3 90.1 -5.0 -60.5 30 473 19 55 30 19 56 30 --- 15 20 20 17.5 90.3 -5.0 -60.5 60 480 19 55 31 19 56 30 MG2016 15 20 20 18.7 87.4 -5.0 -61.3 -10 480 19 56 40 20 00 00 --- 15 23 50 19.4 87.9 -4.9 -61.3 200 506 19 56 31 20 00 00 J2018+0831 15 23 50 18.3 90.7 -4.9 -60.5 -10 506 20 00 10 20 01 30 --- 15 25 21 18.6 90.9 -4.9 -60.5 80 516 20 00 01 Schedule for VLBA_FD (Code Fd ) 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 01 30 MG2016 15 25 21 19.8 88.1 -4.9 -61.4 -10 516 20 01 40 20 05 00 --- 15 28 51 20.5 88.5 -4.9 -61.4 200 542 20 01 31 20 05 40 J2018+0831 15 29 31 19.5 91.4 -4.8 -60.5 30 542 20 05 40 20 06 40 --- 15 30 31 19.7 91.6 -4.8 -60.4 60 550 20 05 41 20 06 40 MG2016 15 30 31 20.9 88.7 -4.8 -61.4 -10 550 20 06 50 20 10 10 --- 15 34 02 21.6 89.2 -4.8 -61.4 200 576 20 06 41 20 10 10 J2018+0831 15 34 02 20.4 92.0 -4.8 -60.4 -10 576 20 10 20 20 11 40 --- 15 35 32 20.8 92.2 -4.7 -60.4 80 586 20 10 11 20 11 40 MG2016 15 35 32 22.0 89.3 -4.7 -61.4 -10 586 20 11 50 20 15 10 --- 15 39 03 22.7 89.8 -4.7 -61.4 200 612 20 11 41 20 15 50 J2018+0831 15 39 43 21.7 92.8 -4.7 -60.4 30 612 20 15 50 20 16 50 --- 15 40 43 21.9 92.9 -4.6 -60.4 60 619 20 15 51 20 16 50 MG2016 15 40 43 23.1 90.0 -4.7 -61.4 -10 619 20 17 00 20 20 20 --- 15 44 14 23.8 90.4 -4.6 -61.4 200 645 20 16 51 20 20 20 J2018+0831 15 44 14 22.6 93.4 -4.6 -60.3 -10 645 20 20 30 20 21 50 --- 15 45 44 23.0 93.6 -4.6 -60.3 80 655 20 20 21 20 21 50 MG2016 15 45 44 24.1 90.6 -4.6 -61.4 -10 655 20 22 00 20 25 20 --- 15 49 15 24.9 91.1 -4.5 -61.4 200 681 20 21 51 20 26 00 J2018+0831 15 49 55 23.9 94.1 -4.5 -60.2 30 681 20 26 00 20 27 00 --- 15 50 55 24.1 94.3 -4.5 -60.2 60 689 20 26 01 20 27 00 MG2016 15 50 55 25.3 91.3 -4.5 -61.4 -10 689 20 27 10 20 30 30 --- 15 54 25 26.0 91.8 -4.4 -61.4 200 715 20 27 01 20 30 30 J2018+0831 15 54 25 24.8 94.7 -4.4 -60.1 -10 715 20 30 40 20 32 00 --- 15 55 56 25.1 94.9 -4.4 -60.1 80 725 20 30 31 20 32 00 MG2016 15 55 56 26.3 92.0 -4.4 -61.4 -10 725 20 32 10 20 35 30 --- 15 59 26 27.1 92.4 -4.3 -61.3 200 751 20 32 01 20 36 10 J2018+0831 16 00 06 26.0 95.5 -4.3 -60.0 30 751 20 36 10 20 37 10 --- 16 01 07 26.3 95.6 -4.3 -60.0 60 758 20 36 11 20 37 10 MG2016 16 01 07 27.5 92.6 -4.3 -61.3 -10 758 20 37 20 20 40 40 --- 16 04 37 28.2 93.1 -4.3 -61.3 200 784 20 37 11 Schedule for VLBA_FD (Code Fd ) Page 5 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 41 20 J2018+0831 16 05 17 27.1 96.2 -4.2 -59.9 30 784 20 41 20 20 42 20 --- 16 06 17 27.4 96.4 -4.2 -59.9 60 792 20 41 21 20 42 20 MG2016 16 06 17 28.6 93.3 -4.2 -61.2 -10 792 20 42 30 20 45 50 --- 16 09 48 29.3 93.8 -4.2 -61.2 200 818 20 42 21 20 45 50 J2018+0831 16 09 48 28.1 96.9 -4.2 -59.8 -10 818 20 46 00 20 47 20 --- 16 11 18 28.4 97.1 -4.1 -59.7 80 828 20 45 51 20 47 20 MG2016 16 11 18 29.6 94.0 -4.1 -61.2 -10 828 20 47 30 20 50 50 --- 16 14 49 30.4 94.5 -4.1 -61.1 200 854 20 47 21 20 51 30 J2018+0831 16 15 29 29.3 97.7 -4.1 -59.6 30 854 20 51 30 20 52 30 --- 16 16 29 29.5 97.8 -4.0 -59.6 60 862 20 51 31 20 52 30 MG2016 16 16 29 30.8 94.7 -4.1 -61.1 -10 862 20 52 40 20 56 00 --- 16 20 00 31.5 95.2 -4.0 -61.0 200 887 20 52 31 20 56 30 J2018+0831 16 20 30 30.4 98.4 -4.0 -59.4 20 887 20 56 30 21 00 00 --- 16 24 00 31.1 98.9 -3.9 -59.3 210 914 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: 5 Station: VLBA_FD 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