COVER INFORMATION Station: HART (Code Hh ) Experiment: Does Cygnus A harbor a binary black hole? Exp. Code: EB064I 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: This is the schedule for epoch I of EB064 at 1.3cm. It involves 17 antennas Jb2, EF, MC, O60, T6, Ur, Tr, Sr, Ys, Sv, Zc, Bd, Hh, Mh, Kt, Ky, and Ku 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, because the observation happen during sunrise 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 ---------------------------------------------------------------------------------------- --- Wed 17 Mar 2021 Day 76 --- 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 03 30 00 CYG-A 17 00 29 11.4 33.0 -3.0 0.0 0 0 03 30 00 03 40 00 --- 17 10 31 12.6 31.6 -2.8 0.0 600 155 03 30 01 03 40 30 CYG-A 17 11 01 12.6 31.5 -2.8 0.0 9 155 03 40 30 03 50 30 --- 17 21 03 13.8 29.9 -2.7 0.0 600 309 03 40 31 03 51 30 2013+370 17 22 03 14.8 34.6 -2.9 0.0 25 309 03 51 30 03 56 30 --- 17 27 04 15.4 33.8 -2.8 0.0 300 386 03 51 31 03 57 30 CYG-A 17 28 04 14.6 28.8 -2.5 0.0 25 386 03 57 30 04 07 30 --- 17 38 05 15.6 27.2 -2.4 0.0 600 541 03 57 31 04 08 00 CYG-A 17 38 35 15.7 27.1 -2.4 0.0 9 541 04 08 00 04 18 00 --- 17 48 37 16.7 25.4 -2.2 0.0 600 696 04 08 01 04 18 30 CYG-A 17 49 07 16.7 25.3 -2.2 0.0 9 696 04 18 30 04 28 30 --- 17 59 09 17.6 23.6 -2.0 0.0 600 850 04 18 31 04 29 00 CYG-A 17 59 39 17.7 23.5 -2.0 0.0 9 850 04 29 00 04 39 00 --- 18 09 40 18.6 21.7 -1.8 0.0 600 1005 04 29 01 04 39 30 CYG-A 18 10 11 18.6 21.6 -1.8 0.0 9 1005 04 39 30 04 49 30 --- 18 20 12 19.4 19.8 -1.7 0.0 600 1159 04 39 31 04 50 00 CYG-A 18 20 42 19.4 19.7 -1.7 0.0 9 1159 04 50 00 05 00 00 --- 18 30 44 20.2 17.9 -1.5 0.0 600 1314 04 50 01 ---------- 5-min gap for pointing ---------- 05 06 00 2013+370 18 36 45 22.7 21.3 -1.7 0.0 325 1314 05 06 00 05 11 00 --- 18 41 46 23.1 20.3 -1.6 0.0 300 1391 05 06 01 05 12 45 CYG-A 18 43 31 21.0 15.4 -1.3 0.0 70 1391 05 12 45 05 22 45 --- 18 53 33 21.6 13.5 -1.1 0.0 600 1546 05 12 46 05 23 15 CYG-A 18 54 03 21.6 13.4 -1.1 0.0 9 1546 05 23 15 05 33 15 --- 19 04 04 22.1 11.4 -0.9 0.0 600 1700 05 23 16 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 ---------------------------------------------------------------------------------------- --- Wed 17 Mar 2021 Day 76 --- 05 33 45 CYG-A 19 04 34 22.1 11.3 -0.9 0.0 9 1700 05 33 45 05 43 45 --- 19 14 36 22.5 9.3 -0.8 0.0 600 1855 05 33 46 05 44 15 CYG-A 19 15 06 22.5 9.2 -0.8 0.0 9 1855 05 44 15 05 54 15 --- 19 25 08 22.8 7.2 -0.6 0.0 600 2010 05 44 16 05 54 45 CYG-A 19 25 38 22.8 7.1 -0.6 0.0 9 2010 05 54 45 06 04 45 --- 19 35 40 23.1 5.0 -0.4 0.0 600 2164 05 54 46 06 05 15 CYG-A 19 36 10 23.1 4.9 -0.4 0.0 9 2164 06 05 15 06 15 15 --- 19 46 11 23.2 2.9 -0.2 0.0 600 2319 06 05 16 06 15 45 CYG-A 19 46 41 23.3 2.8 -0.2 0.0 9 2319 06 15 45 06 25 45 --- 19 56 43 23.3 0.7 -0.1 0.0 600 2473 06 15 46 ---------- 5-min gap for pointing ---------- 06 32 45 BLLAC 20 03 44 16.4 22.6 -2.0 0.0 332 2473 06 32 45 06 37 45 --- 20 08 45 16.8 21.7 -1.9 0.0 300 2551 06 32 46 06 41 00 CYG-A 20 12 00 23.3 357.6 0.2 0.0 106 2551 06 41 00 06 51 00 --- 20 22 02 23.1 355.5 0.4 0.0 600 2705 06 41 01 06 51 30 CYG-A 20 22 32 23.1 355.4 0.4 0.0 9 2705 06 51 30 07 01 30 --- 20 32 34 22.9 353.4 0.5 0.0 600 2860 06 51 31 07 02 00 CYG-A 20 33 04 22.9 353.3 0.5 0.0 9 2860 07 02 00 07 12 00 --- 20 43 06 22.6 351.2 0.7 0.0 600 3014 07 02 01 07 12 30 CYG-A 20 43 36 22.6 351.1 0.7 0.0 9 3014 07 12 30 07 22 30 --- 20 53 37 22.2 349.1 0.9 0.0 600 3169 07 12 31 07 23 00 CYG-A 20 54 07 22.2 349.0 0.9 0.0 9 3169 07 23 00 07 33 00 --- 21 04 09 21.7 347.0 1.1 0.0 600 3324 07 23 01 07 33 30 CYG-A 21 04 39 21.7 346.9 1.1 0.0 9 3324 07 33 30 07 43 30 --- 21 14 41 21.1 345.0 1.2 0.0 600 3478 07 33 31 07 44 00 CYG-A 21 15 11 21.1 344.9 1.3 0.0 9 3478 07 44 00 07 54 00 --- 21 25 12 20.5 343.0 1.4 0.0 600 3633 07 44 01 ---------- 5-min gap for pointing ---------- 08 03 00 BLLAC 21 34 14 21.4 5.8 -0.5 0.0 452 3633 08 03 00 08 08 00 --- 21 39 15 21.5 4.8 -0.4 0.0 300 3710 08 03 01 Schedule for HART (Code Hh ) Page 4 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 ---------------------------------------------------------------------------------------- --- Wed 17 Mar 2021 Day 76 --- 08 12 45 CYG-A 21 44 00 19.1 339.5 1.7 0.0 196 3710 08 12 45 08 22 45 --- 21 54 02 18.3 337.7 1.9 0.0 600 3865 08 12 46 08 23 15 CYG-A 21 54 32 18.2 337.6 1.9 0.0 9 3865 08 23 15 08 32 45 --- 22 04 04 17.4 335.9 2.1 0.0 570 4011 08 23 16 08 33 15 CYG-A 22 04 34 17.3 335.8 2.1 0.0 9 4011 08 33 15 08 42 45 --- 22 14 05 16.4 334.2 2.2 0.0 570 4158 08 33 16 08 43 15 CYG-A 22 14 36 16.4 334.1 2.2 0.0 9 4158 08 43 15 08 52 45 --- 22 24 07 15.4 332.5 2.4 0.0 570 4305 08 43 16 08 53 15 CYG-A 22 24 37 15.4 332.4 2.4 0.0 9 4305 08 53 15 09 02 45 --- 22 34 09 14.4 330.9 2.6 0.0 570 4452 08 53 16 09 03 15 CYG-A 22 34 39 14.3 330.8 2.6 0.0 9 4452 09 03 15 09 12 45 --- 22 44 10 13.2 329.3 2.7 0.0 570 4599 09 03 16 09 13 15 CYG-A 22 44 40 13.2 329.2 2.7 0.0 9 4599 09 13 15 09 22 45 --- 22 54 12 12.1 327.8 2.9 0.0 570 4746 09 13 16 09 24 35 2013+370 22 56 02 16.5 327.8 2.7 0.0 75 4746 09 24 35 09 29 35 --- 23 01 03 15.9 327.0 2.7 0.0 300 4823 09 24 36 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 10.688657 0.80 J1959+4044 40 35 46.36227 * 40 44 02.09608 40 47 12.02316 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 14.283956 0.09 J2015+3710 37 01 44.45878 * 37 10 59.51466 37 14 35.29569 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 33.375464 0.01 J2202+4216 42 02 08.59075 * 42 16 39.97988 42 22 32.37024 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 14 15 4.783 528.800 2013+370 sess121.K2048 1 2 3 4 5 6 7 8 13 14 15 0.250 26.833 BLLAC sess121.K2048 1 2 3 4 5 6 7 8 13 14 15 0.167 21.333 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 66.6 2013+370 62.3 BLLAC 49.6 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