COVER INFORMATION Station: HART (Code Hh ) Experiment: Does Cygnus A harbor a binary black hole? Exp. Code: EB064J Schedule Version: 1.00 Processed by SCHED version: 11.60 Release 11.6; April 2020 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: !EB064J Jb2 −−− Ef Mc −− On60 −− Ur Tr Ys Hh Sv Zc Bd −− Sr Mh −− −− −− −− −− −−−− −−− EVN 71.88 5.53 Eu 077 0730(18/03)−1330(18/03) final epoch This is the schedule for epoch J of EB064 at 1.3cm. It involves 13 antennas Jb2, EF, Mc, O60, Ur, Tr, Sr, Ys, Sv, Zc, Bd, Hh, and Mh and runs at a standard 2 Gbps continuum mode. Gaps between scans are adjusted to allow time for Tsys measurements on source and some pointing time every 1.5 hours, because the observation happen during daytime 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 ---------------------------------------------------------------------------------------- --- Thu 18 Mar 2021 Day 77 --- 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 07 30 00 2013+370 21 05 05 25.8 349.2 0.8 0.0 0 0 07 30 00 07 35 00 --- 21 10 06 25.6 348.1 0.9 0.0 300 77 07 30 01 07 36 30 CYG-A 21 11 36 21.3 345.6 1.2 0.0 55 77 07 36 30 07 46 30 --- 21 21 38 20.7 343.6 1.4 0.0 600 232 07 36 31 07 47 00 CYG-A 21 22 08 20.7 343.5 1.4 0.0 9 232 07 47 00 07 57 00 --- 21 32 10 20.0 341.7 1.5 0.0 600 386 07 47 01 07 57 30 CYG-A 21 32 40 20.0 341.6 1.5 0.0 9 386 07 57 30 08 07 30 --- 21 42 41 19.2 339.7 1.7 0.0 600 541 07 57 31 08 08 00 CYG-A 21 43 11 19.2 339.6 1.7 0.0 9 541 08 08 00 08 18 00 --- 21 53 13 18.3 337.8 1.9 0.0 600 696 08 08 01 08 18 30 CYG-A 21 53 43 18.3 337.7 1.9 0.0 9 696 08 18 30 08 28 30 --- 22 03 45 17.4 336.0 2.1 0.0 600 850 08 18 31 08 29 00 CYG-A 22 04 15 17.4 335.9 2.1 0.0 9 850 08 29 00 08 39 00 --- 22 14 16 16.4 334.2 2.2 0.0 600 1005 08 29 01 08 39 30 CYG-A 22 14 47 16.4 334.1 2.2 0.0 9 1005 08 39 30 08 49 30 --- 22 24 48 15.4 332.4 2.4 0.0 600 1159 08 39 31 08 50 00 CYG-A 22 25 18 15.3 332.3 2.4 0.0 9 1159 08 50 00 09 00 00 --- 22 35 20 14.2 330.7 2.6 0.0 600 1314 08 50 01 ---------- 5-min gap for pointing ---------- 09 06 52 2013+370 22 42 13 18.1 330.1 2.4 0.0 377 1314 09 06 52 09 11 52 --- 22 47 14 17.6 329.3 2.5 0.0 300 1391 09 06 53 09 13 37 CYG-A 22 48 59 12.7 328.6 2.8 0.0 70 1391 09 13 37 09 23 37 --- 22 59 01 11.5 327.1 3.0 0.0 600 1546 09 13 38 09 24 07 CYG-A 22 59 31 11.4 327.0 3.0 0.0 9 1546 09 24 07 09 34 07 --- 23 09 33 10.2 325.6 3.2 0.0 600 1700 09 24 08 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 ---------------------------------------------------------------------------------------- --- Thu 18 Mar 2021 Day 77 --- 09 34 37 CYG-A 23 10 03 10.1 325.5 3.2 0.0 9 1700 09 34 37 09 44 37 --- 23 20 04 8.8 324.1 3.3 H 0.0 0 1855 09 34 38 09 45 07 CYG-A 23 20 34 8.7 324.0 3.3 H 0.0 9 1855 09 45 07 09 55 07 --- 23 30 36 7.4 322.7 3.5 D 0.0 0 2010 09 45 08 ---------- 5-min gap for pointing ---------- 10 33 37 BLLAC 00 09 12 15.8 336.4 2.1 0.0 2222 2010 10 33 37 10 38 37 --- 00 14 13 15.4 335.6 2.2 0.0 300 2087 10 33 38 SETUP FILE INFORMATION: NOTE: If DOPPLER, FREQ, or BW were used, see the individual scans for the final BBC settings. ======== Setup file: sess121.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 11 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 10.723925 0.80 J1959+4044 40 35 46.36227 * 40 44 02.09608 40 47 11.92082 0.53 * CYG-A /home/guest/rmc/SCHED/sched11.6/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 14.316572 0.09 J2015+3710 37 01 44.45878 * 37 10 59.51466 37 14 35.18966 0.12 /home/guest/rmc/SCHED/sched11.6/catalogs/sources.gsfc GSFC 2016a X/S astro solution, 131 observations. VR422201 22 00 39.362504 * 22 02 43.291371 22 03 33.398289 0.01 J2202+4216 42 02 08.59075 * 42 16 39.97988 42 22 32.16093 0.00 * BLLAC /home/guest/rmc/SCHED/sched11.6/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 sess121.K2048 1 2 3 4 5 6 7 8 13 4.825 279.292 2013+370 sess121.K2048 1 2 3 4 5 6 7 8 13 0.250 15.750 BLLAC sess121.K2048 1 2 3 4 5 6 7 8 13 0.167 9.250 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 67.0 2013+370 62.7 BLLAC 49.7 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