COVER INFORMATION Station: VLBA_KP (Code Kp ) 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_KP (Code Kp ) 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 09 10 MG2016 14 02 12 2.3 77.9 -6.3 H -57.8 0 0 19 09 10 19 12 40 --- 14 05 42 3.0 78.3 -6.2 H -58.0 0 27 19 09 11 19 14 10 MG2016 14 07 13 3.4 78.5 -6.2 H -58.1 84 27 19 14 10 19 17 40 --- 14 10 43 4.1 79.0 -6.2 H -58.2 0 54 19 14 11 19 18 20 J2018+0831 14 11 23 2.9 81.7 -6.1 H -58.1 29 54 19 18 20 19 19 20 --- 14 12 23 3.1 81.8 -6.1 H -58.1 0 62 19 18 21 19 19 20 MG2016 14 12 23 4.4 79.2 -6.1 H -58.3 -11 62 19 19 31 19 22 50 --- 14 15 54 5.2 79.6 -6.1 H -58.4 0 87 19 19 21 19 22 50 J2018+0831 14 15 54 3.9 82.3 -6.1 H -58.2 -11 87 19 23 01 19 24 20 --- 14 17 24 4.2 82.5 -6.0 H -58.3 0 98 19 22 51 19 24 20 MG2016 14 17 24 5.5 79.8 -6.0 H -58.5 -11 98 19 24 31 19 27 50 --- 14 20 55 6.2 80.3 -6.0 H -58.6 0 123 19 24 21 19 28 30 J2018+0831 14 21 35 5.1 83.0 -6.0 H -58.4 29 123 19 28 30 19 29 30 --- 14 22 35 5.3 83.1 -5.9 H -58.4 0 131 19 28 31 19 36 10 MG2016 14 29 16 8.0 81.3 -5.8 H -58.9 389 131 19 36 10 19 39 40 --- 14 32 47 8.7 81.8 -5.8 -59.0 0 158 19 36 11 19 39 40 J2018+0831 14 32 47 7.4 84.5 -5.8 -58.7 -11 158 19 39 51 19 41 10 --- 14 34 17 7.7 84.7 -5.7 -58.7 79 168 19 39 41 19 41 10 MG2016 14 34 17 9.0 82.0 -5.8 -59.0 -11 168 19 41 21 19 44 40 --- 14 37 48 9.8 82.4 -5.7 -59.1 199 194 19 41 11 19 45 20 J2018+0831 14 38 28 8.6 85.2 -5.7 -58.8 29 194 19 45 20 19 46 20 --- 14 39 28 8.8 85.3 -5.7 -58.8 60 202 19 45 21 19 46 20 MG2016 14 39 28 10.1 82.7 -5.7 -59.2 -11 202 19 46 31 19 49 50 --- 14 42 59 10.8 83.1 -5.6 -59.3 199 227 19 46 21 19 49 50 J2018+0831 14 42 59 9.6 85.8 -5.6 -58.8 -11 227 19 50 01 19 51 20 --- 14 44 29 9.9 86.0 -5.6 -58.9 79 237 19 49 51 19 51 20 MG2016 14 44 29 11.2 83.3 -5.6 -59.3 -11 237 19 51 31 19 54 50 --- 14 47 59 11.9 83.7 -5.5 -59.4 199 263 19 51 21 Schedule for VLBA_KP (Code Kp ) 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 55 30 J2018+0831 14 48 39 10.8 86.5 -5.5 -58.9 29 263 19 55 30 19 56 30 --- 14 49 40 11.0 86.7 -5.5 -58.9 60 271 19 55 31 19 56 30 MG2016 14 49 40 12.2 83.9 -5.5 -59.4 -11 271 19 56 41 20 00 00 --- 14 53 10 13.0 84.4 -5.5 -59.5 199 296 19 56 31 20 00 00 J2018+0831 14 53 10 11.7 87.1 -5.4 -59.0 -11 296 20 00 11 20 01 30 --- 14 54 40 12.0 87.3 -5.4 -59.0 79 307 20 00 01 20 01 30 MG2016 14 54 40 13.3 84.6 -5.4 -59.5 -11 307 20 01 41 20 05 00 --- 14 58 11 14.0 85.0 -5.4 -59.6 199 332 20 01 31 20 05 40 J2018+0831 14 58 51 12.9 87.8 -5.3 -59.0 30 332 20 05 40 20 06 40 --- 14 59 51 13.1 88.0 -5.3 -59.0 60 340 20 05 41 20 06 40 MG2016 14 59 51 14.4 85.3 -5.3 -59.6 -11 340 20 06 51 20 10 10 --- 15 03 22 15.1 85.7 -5.3 -59.7 199 366 20 06 41 20 10 10 J2018+0831 15 03 22 13.9 88.4 -5.3 -59.1 -10 366 20 10 20 20 11 40 --- 15 04 52 14.2 88.6 -5.2 -59.1 80 376 20 10 11 20 11 40 MG2016 15 04 52 15.5 85.9 -5.3 -59.7 -11 376 20 11 51 20 15 10 --- 15 08 23 16.2 86.3 -5.2 -59.8 199 402 20 11 41 20 15 50 J2018+0831 15 09 03 15.1 89.2 -5.2 -59.1 30 402 20 15 50 20 16 50 --- 15 10 03 15.3 89.3 -5.2 -59.1 60 409 20 15 51 20 16 50 MG2016 15 10 03 16.6 86.6 -5.2 -59.8 -11 409 20 17 01 20 20 20 --- 15 13 34 17.3 87.0 -5.1 -59.8 199 435 20 16 51 20 20 20 J2018+0831 15 13 34 16.0 89.8 -5.1 -59.1 -10 435 20 20 30 20 21 50 --- 15 15 04 16.4 90.0 -5.1 -59.1 80 445 20 20 21 20 21 50 MG2016 15 15 04 17.6 87.2 -5.1 -59.9 -11 445 20 22 01 20 25 20 --- 15 18 34 18.4 87.7 -5.0 -59.9 199 471 20 21 51 20 26 00 J2018+0831 15 19 14 17.3 90.5 -5.0 -59.1 30 471 20 26 00 20 27 00 --- 15 20 15 17.5 90.7 -5.0 -59.1 60 479 20 26 01 20 27 00 MG2016 15 20 15 18.7 87.9 -5.0 -59.9 -11 479 20 27 11 20 30 30 --- 15 23 45 19.5 88.3 -4.9 -59.9 199 504 20 27 01 20 30 30 J2018+0831 15 23 45 18.2 91.1 -4.9 -59.1 -10 504 20 30 40 20 32 00 --- 15 25 15 18.5 91.3 -4.9 -59.1 80 515 20 30 31 Schedule for VLBA_KP (Code Kp ) 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 32 00 MG2016 15 25 15 19.8 88.5 -4.9 -60.0 -11 515 20 32 11 20 35 30 --- 15 28 46 20.5 89.0 -4.9 -60.0 199 540 20 32 01 20 36 10 J2018+0831 15 29 26 19.4 91.9 -4.8 -59.1 30 540 20 36 10 20 37 10 --- 15 30 26 19.6 92.0 -4.8 -59.0 60 548 20 36 11 20 37 10 MG2016 15 30 26 20.9 89.2 -4.8 -60.0 -11 548 20 37 21 20 40 40 --- 15 33 57 21.6 89.7 -4.8 -60.0 199 574 20 37 11 20 41 20 J2018+0831 15 34 37 20.5 92.6 -4.7 -59.0 30 574 20 41 20 20 42 20 --- 15 35 37 20.7 92.7 -4.7 -59.0 60 581 20 41 21 20 42 20 MG2016 15 35 37 22.0 89.9 -4.7 -60.0 -11 581 20 42 31 20 45 50 --- 15 39 08 22.7 90.3 -4.7 -60.0 199 607 20 42 21 20 45 50 J2018+0831 15 39 08 21.5 93.2 -4.7 -59.0 -10 607 20 46 00 20 47 20 --- 15 40 38 21.8 93.4 -4.6 -58.9 80 617 20 45 51 20 47 20 MG2016 15 40 38 23.0 90.5 -4.7 -60.0 -11 617 20 47 31 20 50 50 --- 15 44 09 23.8 91.0 -4.6 -60.0 199 643 20 47 21 20 51 30 J2018+0831 15 44 49 22.7 94.0 -4.6 -58.9 30 643 20 51 30 20 52 30 --- 15 45 49 22.9 94.1 -4.6 -58.9 60 651 20 51 31 20 52 30 MG2016 15 45 49 24.1 91.2 -4.6 -60.0 -11 651 20 52 41 20 56 00 --- 15 49 19 24.9 91.7 -4.5 -59.9 199 676 20 52 31 20 56 30 J2018+0831 15 49 49 23.7 94.7 -4.5 -58.8 20 676 20 56 30 21 00 00 --- 15 53 20 24.5 95.2 -4.4 -58.7 210 703 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: 8 Station: VLBA_KP 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