COVER INFORMATION Station: HART (Code Hh ) Experiment: Does Cygnus A harbor a binary black hole? Exp. Code: EB064H Schedule Version: 3.00 Processed by SCHED version: 11.50 Development version 11.5. Started Apr. 2 PI: Uwe Bach Address: Max-Planck-Institut fuer Radioastronomie Auf dem Huegel 69 53121 Bonn Germany Phone: 0049-2257-301-168 EMAIL: ubach@mpifr-bonn.mpg.de Fax: 0049-2257-301-106 Phone during observation: 0049-2257-301-155 Observing mode: Notes: Use 2013+370 as fring tracer and BL Lac as 2nd calibrators COVER LETTER: This is the schedule for epoch H of EB064 at 1.3cm. It involves 13 antennas EF, MC, Nt, O60, Ur, Tr, Sr, Ys, Sv, Zc, Bd, Hh, and Mh and runs at a standard 1 Gbps continuum mode. Gaps between scans are adjusted to allow time for Tsys measurements on source and some pointing time every 1.5 hours at Effelsberg. Fringe finders are 2013+370 and BL Lac. Schedule for HART (Code Hh ) Page 2 Does Cygnus A harbor a binary black hole? 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 ---------------------------------------------------------------------------------------- --- Sun 7 Jun 2020 Day 159 --- Next scan frequencies: 22139.49 22139.49 22139.49 22139.49 22203.49 22203.49 22203.49 22203.49 22267.49 22267.49 22267.49 22267.49 22331.49 22331.49 22331.49 22331.49 Next BBC frequencies: 659.49 659.49 659.49 659.49 723.49 723.49 723.49 723.49 787.49 787.49 787.49 787.49 851.49 851.49 851.49 851.49 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 02 00 00 CYG-A 20 54 29 22.1 348.9 0.9 0.0 0 0 02 00 00 02 10 00 --- 21 04 31 21.7 347.0 1.1 0.0 600 155 02 00 01 02 10 30 CYG-A 21 05 01 21.6 346.9 1.1 0.0 9 155 02 10 30 02 20 30 --- 21 15 03 21.1 344.9 1.2 0.0 600 309 02 10 31 02 21 00 CYG-A 21 15 33 21.1 344.8 1.3 0.0 9 309 02 21 00 02 31 00 --- 21 25 34 20.4 342.9 1.4 0.0 600 464 02 21 01 02 31 30 CYG-A 21 26 04 20.4 342.8 1.4 0.0 9 464 02 31 30 02 41 30 --- 21 36 06 19.7 340.9 1.6 0.0 600 618 02 31 31 02 42 00 CYG-A 21 36 36 19.7 340.8 1.6 0.0 9 618 02 42 00 02 52 00 --- 21 46 38 18.9 339.0 1.8 0.0 600 773 02 42 01 02 52 30 CYG-A 21 47 08 18.9 338.9 1.8 0.0 9 773 02 52 30 03 02 30 --- 21 57 09 18.0 337.1 1.9 0.0 600 927 02 52 31 ---------- 5-min gap for pointing ---------- 03 09 06 2013+370 22 03 46 22.0 337.2 1.8 0.0 361 927 03 09 06 03 14 06 --- 22 08 47 21.5 336.2 1.9 0.0 300 1005 03 09 07 03 15 51 CYG-A 22 10 32 16.8 334.8 2.2 0.0 70 1005 03 15 51 03 25 51 --- 22 20 34 15.8 333.1 2.3 0.0 600 1159 03 15 52 03 26 21 CYG-A 22 21 04 15.7 333.0 2.3 0.0 9 1159 03 26 21 03 36 21 --- 22 31 06 14.7 331.4 2.5 0.0 600 1314 03 26 22 03 36 51 CYG-A 22 31 36 14.6 331.3 2.5 0.0 9 1314 03 36 51 03 46 51 --- 22 41 38 13.5 329.7 2.7 0.0 600 1469 03 36 52 03 47 21 CYG-A 22 42 08 13.5 329.6 2.7 0.0 9 1469 03 47 21 03 57 21 --- 22 52 09 12.3 328.1 2.9 0.0 600 1623 03 47 22 03 57 51 CYG-A 22 52 39 12.2 328.0 2.9 0.0 9 1623 03 57 51 04 07 51 --- 23 02 41 11.0 326.5 3.0 0.0 600 1778 03 57 52 Schedule for HART (Code Hh ) Page 3 Does Cygnus A harbor a binary black hole? 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 ---------------------------------------------------------------------------------------- --- Sun 7 Jun 2020 Day 159 --- ---------- 5-min gap for pointing ---------- 04 13 21 2013+370 23 08 12 15.0 325.8 2.9 0.0 295 1778 04 13 21 04 18 21 --- 23 13 13 14.4 325.0 2.9 0.0 300 1855 04 13 22 04 19 32 CYG-A 23 14 24 9.5 324.9 3.2 0.0 36 1855 04 19 32 04 29 32 --- 23 24 26 8.2 323.5 3.4 H 0.0 0 2010 04 19 33 SETUP FILE INFORMATION: NOTE: If DOPPLER, FREQ, or BW were used, see the individual scans for the final BBC settings. ======== Setup file: sess220.K2048 --- WARNING --- This group does not match an entry in the frequency catalog. This might be ok because the catalog is not complete. But be very careful to be sure that the setup is correct. Setup group: 7 Station: HART Total bit rate: 2048 Format: VDIF Bits per sample: 2 Sample rate: 64.000 Number of channels: 16 DBE type: DBBC_DDC Speedup factor: 1.00 Disk used to record data. 1st LO= 21480.00 21480.00 21480.00 21480.00 21480.00 21480.00 21480.00 21480.00 21480.00 21480.00 21480.00 21480.00 21480.00 21480.00 21480.00 21480.00 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 = A1 C1 A1 C1 A1 C1 A1 C1 A1 C1 A1 C1 A1 C1 A1 C1 The following frequency sets based on these setups were used. Frequency Set: 4 Setup file default. Used with PCAL = off LO sum= 22139.49 22139.49 22139.49 22139.49 22203.49 22203.49 22203.49 22203.49 22267.49 22267.49 22267.49 22267.49 22331.49 22331.49 22331.49 22331.49 BBC fr= 659.49 659.49 659.49 659.49 723.49 723.49 723.49 723.49 787.49 787.49 787.49 787.49 851.49 851.49 851.49 851.49 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: 4 8 Track assignments are: track1= 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16 barrel=roll_off POSITIONS OF SOURCES USED IN RECORDING SCANS Source Source position (RA/Dec) Error (B1950) (J2000) (Date) (mas) CYGNUS-A 19 57 44.440790 * 19 59 28.356468 20 00 11.378404 0.80 J1959+4044 40 35 46.36227 * 40 44 02.09608 40 47 13.16047 0.53 * CYG-A /home/guest/rmc/SCHED/sched11.5/catalogs/sources.gsfc J1959+40 GSFC 2016a X/S astro solution, 27 observations. 1957+405 1957+404 1957+40 * 2013+370 20 13 37.014517 * 20 15 28.729803 20 16 14.743740 0.09 J2015+3710 37 01 44.45878 * 37 10 59.51466 37 14 34.41330 0.12 /home/guest/rmc/SCHED/sched11.5/catalogs/sources.gsfc GSFC 2016a X/S astro solution, 131 observations. VR422201 22 00 39.362504 * 22 02 43.291371 22 03 33.650782 0.01 J2202+4216 42 02 08.59075 * 42 16 39.97988 42 22 17.08514 0.00 * BLLAC /home/guest/rmc/SCHED/sched11.5/catalogs/sources.gsfc 2200+420 GSFC 2016a X/S astro solution, 52189 observations. J2202+42 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 CYG-A sess220.K2048 1 2 3 4 5 6 7 9 13 4.833 335.500 2013+370 sess220.K2048 1 2 3 4 5 6 7 9 13 0.250 19.750 BLLAC sess220.K2048 1 2 3 4 5 6 7 9 13 0.161 10.778 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) CYG-A 104.3 2013+370 104.7 BLLAC 85.1 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