COVER INFORMATION Station: ARECIBO (Code Ar ) Experiment: Confirming the first detection of a merging dual SMBH system at high-z Exp. Code: gs044b 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 COVER LETTER: Schedule for ARECIBO (Code Ar ) 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 ---------------------------------------------------------------------------------------- --- Tue 29 Oct 2019 Day 302 --- Next scan frequencies: 4860.25 4860.25 4892.25 4892.25 4924.25 4924.25 4956.25 4956.25 Next BBC frequencies: 889.75 889.75 857.75 857.75 825.75 825.75 793.75 793.75 Next scan bandwidths: 32.00 32.00 32.00 32.00 32.00 32.00 32.00 32.00 20 56 20 MG2016 19 00 55 69.7 106.8 -1.3 D -68.0 0 0 20 56 20 20 59 50 --- 19 04 26 70.5 107.8 -1.3 -67.3 0 27 20 56 21 21 01 40 J2018+0831 19 06 16 69.8 116.4 -1.2 D -59.3 79 27 Stopped 21 07 40 --- 19 12 17 71.1 118.8 -1.1 -57.3 0 27 21 18 40 J2018+0831 19 23 19 73.3 123.9 -0.9 -52.8 647 27 21 18 40 21 19 40 --- 19 24 19 73.5 124.4 -0.9 -52.4 60 35 21 18 41 21 19 40 MG2016 19 24 19 74.9 114.9 -0.9 -61.5 -45 35 No stop 21 23 10 --- 19 27 50 75.6 116.5 -0.9 -60.1 165 62 21 19 41 21 23 10 J2018+0831 19 27 50 74.2 126.4 -0.9 -50.6 -41 62 No stop 21 24 40 --- 19 29 20 74.5 127.2 -0.8 -49.8 49 73 21 23 11 21 24 40 MG2016 19 29 20 75.9 117.3 -0.8 -59.4 -47 73 No stop 21 28 10 --- 19 32 51 76.7 119.2 -0.8 -57.8 163 100 21 24 41 21 28 50 J2018+0831 19 33 31 75.2 129.8 -0.8 -47.5 -3 100 21 28 50 21 29 50 --- 19 34 31 75.4 130.5 -0.7 -46.9 57 108 21 28 51 21 29 50 MG2016 19 34 31 77.0 120.1 -0.8 -56.9 -50 108 No stop 21 33 20 --- 19 38 02 77.7 122.3 -0.7 -54.9 160 135 21 29 51 21 33 20 J2018+0831 19 38 02 76.1 133.0 -0.7 -44.6 -46 135 No stop 21 34 50 --- 19 39 32 76.3 134.1 -0.7 -43.6 44 147 21 33 21 21 34 50 MG2016 19 39 32 78.0 123.4 -0.7 -54.0 -54 147 No stop 21 38 20 --- 19 43 02 78.7 125.9 -0.6 -51.6 156 174 21 34 51 21 39 00 J2018+0831 19 43 42 77.0 137.4 -0.6 -40.5 -10 174 21 39 00 21 40 00 --- 19 44 43 77.2 138.3 -0.6 -39.7 50 182 21 39 01 21 40 00 MG2016 19 44 43 79.0 127.3 -0.6 -50.4 -57 182 No stop 21 43 30 --- 19 48 13 79.7 130.3 -0.5 -47.6 153 209 21 40 01 21 43 30 J2018+0831 19 48 13 77.7 141.4 -0.5 -36.8 -54 209 No stop 21 45 00 --- 19 49 43 77.9 142.8 -0.5 -35.5 36 220 21 43 31 21 45 00 MG2016 19 49 43 80.0 131.8 -0.5 -46.3 -61 220 No stop 21 48 30 --- 19 53 14 80.6 135.4 -0.4 -42.9 149 247 21 45 01 Schedule for ARECIBO (Code Ar ) 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 ---------------------------------------------------------------------------------------- --- Tue 29 Oct 2019 Day 302 --- 21 49 10 J2018+0831 19 53 54 78.5 147.0 -0.4 -31.5 -18 247 21 49 10 21 50 10 --- 19 54 54 78.6 148.1 -0.4 -30.5 42 255 21 49 11 21 50 10 MG2016 19 54 54 80.8 137.3 -0.4 -41.1 -66 255 No stop 21 53 40 --- 19 58 25 81.4 141.6 -0.4 -37.0 144 282 21 50 11 21 53 40 J2018+0831 19 58 25 79.0 152.0 -0.3 -26.8 -62 282 No stop 21 55 10 --- 19 59 55 79.2 153.8 -0.3 -25.1 28 294 21 53 41 21 55 10 MG2016 19 59 55 81.6 143.6 -0.3 -35.1 -70 294 No stop 21 58 40 --- 20 03 26 82.1 148.7 -0.3 -30.2 140 321 21 55 11 21 59 20 J2018+0831 20 04 06 79.6 159.0 -0.3 -20.1 -27 321 21 59 20 22 00 20 --- 20 05 06 79.7 160.3 -0.2 -18.9 33 328 21 59 21 22 00 20 MG2016 20 05 06 82.3 151.3 -0.3 -27.7 -74 328 No stop 22 03 50 --- 20 08 37 82.6 157.3 -0.2 -22.0 136 356 22 00 21 22 03 50 J2018+0831 20 08 37 79.9 165.0 -0.2 -14.4 -72 356 No stop 22 05 20 --- 20 10 07 80.0 167.0 -0.2 -12.4 18 367 22 03 51 22 05 20 MG2016 20 10 07 82.8 160.0 -0.2 -19.4 -77 367 No stop 22 08 50 --- 20 13 37 83.0 166.6 -0.1 -12.9 133 394 22 05 21 22 09 30 J2018+0831 20 14 17 80.2 173.0 -0.1 -6.7 -36 394 22 09 30 22 10 30 --- 20 15 18 80.2 174.4 -0.1 -5.4 24 402 22 09 31 22 10 30 MG2016 20 15 18 83.1 169.9 -0.1 -9.7 -78 402 No stop 22 14 00 --- 20 18 48 83.2 177.1 -0.0 -2.8 132 429 22 10 31 22 14 00 J2018+0831 20 18 48 80.3 179.5 -0.0 -0.5 -79 429 No stop 22 15 30 --- 20 20 18 80.2 181.7 0.0 1.6 11 441 22 14 01 22 15 30 MG2016 20 20 18 83.2 180.2 0.0 0.2 -79 441 No stop 22 19 00 --- 20 23 49 83.1 187.4 0.1 7.1 131 468 22 15 31 22 19 40 J2018+0831 20 24 29 80.2 187.8 0.1 7.5 -40 468 22 19 40 22 20 40 --- 20 25 29 80.1 189.2 0.1 8.8 20 475 22 19 41 22 20 40 MG2016 20 25 29 83.1 190.7 0.1 10.4 -77 475 No stop 22 24 10 --- 20 29 00 82.9 197.5 0.1 17.0 133 502 22 20 41 22 24 10 J2018+0831 20 29 00 80.0 194.1 0.2 13.6 -80 502 No stop 22 25 40 --- 20 30 30 79.9 196.2 0.2 15.5 10 514 22 24 11 Schedule for ARECIBO (Code Ar ) 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 ---------------------------------------------------------------------------------------- --- Tue 29 Oct 2019 Day 302 --- 22 25 40 MG2016 20 30 30 82.7 200.3 0.2 19.7 -75 514 No stop 22 29 10 --- 20 34 01 82.4 206.5 0.2 25.6 135 541 22 25 41 22 29 50 J2018+0831 20 34 41 79.5 201.7 0.3 20.8 -38 541 22 29 50 22 30 50 --- 20 35 41 79.5 202.9 0.3 22.0 22 549 22 29 51 22 30 50 MG2016 20 35 41 82.2 209.2 0.3 28.2 -72 549 No stop 22 34 20 --- 20 39 12 81.8 214.5 0.3 33.3 138 576 22 30 51 22 34 20 J2018+0831 20 39 12 79.1 207.2 0.3 26.0 -76 576 No stop 22 35 50 --- 20 40 42 78.9 209.0 0.4 27.7 14 587 22 34 21 22 35 50 MG2016 20 40 42 81.6 216.6 0.3 35.3 -68 587 No stop 22 39 20 --- 20 44 12 81.1 221.1 0.4 39.6 142 614 22 35 51 22 40 00 J2018+0831 20 44 52 78.4 213.5 0.4 32.0 -33 614 22 40 00 22 41 00 --- 20 45 53 78.3 214.6 0.4 33.0 27 622 22 40 01 22 41 00 MG2016 20 45 53 80.8 223.1 0.4 41.5 -65 622 No stop 22 44 30 --- 20 49 23 80.2 226.9 0.5 45.0 145 649 22 41 01 22 44 30 J2018+0831 20 49 23 77.8 218.0 0.5 36.2 -70 649 No stop 22 46 00 --- 20 50 53 77.6 219.4 0.5 37.5 20 661 22 44 31 22 46 00 MG2016 20 50 53 79.9 228.4 0.5 46.4 -61 661 No stop 22 49 30 --- 20 54 24 79.3 231.6 0.6 49.4 149 688 22 46 01 22 50 10 J2018+0831 20 55 04 76.9 223.0 0.6 40.9 -27 688 22 50 10 22 51 10 --- 20 56 04 76.8 223.8 0.6 41.7 33 696 22 50 11 22 51 10 MG2016 20 56 04 79.0 233.0 0.6 50.7 -58 696 No stop 22 54 40 --- 20 59 35 78.3 235.7 0.7 53.1 152 723 22 51 11 22 54 40 J2018+0831 20 59 35 76.2 226.5 0.7 44.2 -64 723 No stop 22 56 10 --- 21 01 05 75.9 227.6 0.7 45.2 26 734 22 54 41 22 56 10 MG2016 21 01 05 78.0 236.7 0.7 54.1 -55 734 No stop 22 59 40 --- 21 04 36 77.3 239.0 0.7 56.2 155 761 22 56 11 23 00 20 J2018+0831 21 05 16 75.2 230.5 0.8 47.8 -21 761 23 00 20 23 01 20 --- 21 06 16 75.0 231.1 0.8 48.4 39 769 23 00 21 23 01 20 MG2016 21 06 16 77.0 240.1 0.8 57.1 -52 769 No stop 23 04 50 --- 21 09 47 76.2 242.0 0.8 58.8 158 796 23 01 21 Schedule for ARECIBO (Code Ar ) 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 ---------------------------------------------------------------------------------------- --- Tue 29 Oct 2019 Day 302 --- 23 04 50 J2018+0831 21 09 47 74.3 233.3 0.8 50.3 -58 796 No stop 23 06 20 --- 21 11 17 74.0 234.1 0.9 51.1 32 808 23 04 51 23 06 20 MG2016 21 11 17 75.9 242.8 0.9 59.5 -50 808 No stop 23 09 50 --- 21 14 47 75.2 244.5 0.9 61.0 160 835 23 06 21 23 10 30 J2018+0831 21 15 27 73.2 236.4 0.9 53.1 -16 835 23 10 30 23 11 30 --- 21 16 28 73.0 236.9 1.0 53.5 44 842 23 10 31 23 11 30 MG2016 21 16 28 74.8 245.3 0.9 61.6 -48 842 No stop 23 15 00 --- 21 19 58 74.0 246.8 1.0 62.9 162 870 23 11 31 23 15 00 J2018+0831 21 19 58 72.3 238.6 1.0 55.0 -54 870 No stop 23 16 30 --- 21 21 28 72.0 239.3 1.0 55.6 36 881 23 15 01 23 16 30 MG2016 21 21 28 73.7 247.4 1.0 63.4 -46 881 No stop 23 20 00 --- 21 24 59 72.9 248.7 1.1 64.5 164 908 23 16 31 23 20 40 J2018+0831 21 25 39 71.1 241.1 1.1 57.2 -12 908 23 20 40 23 21 40 --- 21 26 39 70.9 241.5 1.1 57.5 48 916 23 20 41 23 21 40 MG2016 21 26 39 72.6 249.3 1.1 65.0 -45 916 No stop 23 25 10 --- 21 30 10 71.8 250.4 1.2 65.9 165 943 23 21 41 23 26 40 MG2016 21 31 40 71.5 250.9 1.2 66.3 81 943 23 26 40 23 30 10 --- 21 35 11 70.7 252.0 1.2 67.1 210 970 23 26 41 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: arcb4 Using up-down conversion unit + VLBIinp at 1.5 MHz Setup group: 12 Station: ARECIBO 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= 5750.00 5750.00 5750.00 5750.00 5750.00 5750.00 5750.00 5750.00 Net SB= U U U U U U U U IF SB = L L L L L L L L Pol. = RCP LCP RCP LCP RCP LCP RCP LCP BBC = 1 2 3 4 5 6 7 8 BBC SB= L L L L L L L L IF = A C A C A C A C The following frequency sets based on these setups were used. Frequency Set: 25 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= 889.75 889.75 857.75 857.75 825.75 825.75 793.75 793.75 Bandwd= 32.00 32.00 32.00 32.00 32.00 32.00 32.00 32.00 Matching frequency sets: 25 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 13.506927 0.00 11 17 44.97966 * 11 27 13.00000 11 31 07.98419 0.00 From catalog imbedded in main SCHED input file. * 3C345 16 41 17.606162 * 16 42 58.809900 16 43 36.712857 0.00 39 54 10.81394 * 39 48 36.99300 39 46 42.12824 0.00 From catalog imbedded in main SCHED input file. * J2018+0831 20 15 45.733430 * 20 18 11.311946 20 19 07.828310 0.00 08 22 30.62230 * 08 31 54.54739 08 35 47.07174 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 + 12.075 581.686 3C345 sess319.C1024glob 1 2 3 4 5 6 7 8 9 10 11 15 + 0.392 14.779 J2018+0831 sess319.C1024glob 1 2 3 4 5 6 7 8 9 10 11 15 + 4.458 200.004 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 93.9 3C345 63.5 J2018+0831 92.9 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