COVER INFORMATION Station: KVNYS (Code Ky ) Experiment: The variable VLBI core of NGC 4151 Exp. Code: EP113B Schedule Version: 2.00 Processed by SCHED version: 11.50 Development version 11.5. Started Apr. 2 PI: F. Panessa Address: INAF-IAPS via del Fosso del Cavaliere, 100 00133 - Rome Italy Phone: +39 06 4548 8456 EMAIL: francesca.panessa@iaps.inaf.it Fax: --- Phone during observation: +39 06 4548 8456 Observing mode: Phase-referencing of a source at 1.3cm (1024 Mb/s) Notes: Target: NGC4151 Phase calibrator : J1209+4119 D-terms calibrator : -- Fringe finder : 3C286 Schedule for KVNYS (Code Ky ) Page 2 The variable VLBI core of NGC 4151 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 7 Nov 2018 Day 311 --- Next scan frequencies: 22187.49 22187.49 22187.49 22187.49 22219.49 22219.49 22219.49 22219.49 22251.49 22251.49 22251.49 22251.49 22283.49 22283.49 22283.49 22283.49 Next BBC frequencies: 9012.51 9012.51 9012.51 9012.51 8980.51 8980.51 8980.51 8980.51 8948.51 8948.51 8948.51 8948.51 8916.51 8916.51 8916.51 8916.51 Next scan bandwidths: 16.00 16.00 16.00 16.00 16.00 16.00 16.00 16.00 16.00 16.00 16.00 16.00 16.00 16.00 16.00 16.00 07 00 00 3C286 18 33 31 28.8 -72.2 5.0 61.0 0 0 07 00 00 07 02 00 --- 18 35 31 28.4 -71.9 5.1 60.9 120 15 07 00 01 07 03 49 J1209+4119 18 37 20 19.4 -52.3 6.5 56.5 99 15 07 03 49 07 04 49 =1206+416 18 38 20 19.2 -52.2 6.5 56.4 60 23 07 03 50 07 05 36 NGC4151 18 39 07 18.2 -54.0 6.5 55.9 43 23 07 05 36 07 08 36 --- 18 42 08 17.7 -53.6 6.5 55.6 180 46 07 05 37 07 09 21 J1209+4119 18 42 53 18.5 -51.7 6.5 55.8 42 46 07 09 21 07 10 21 =1206+416 18 43 54 18.3 -51.6 6.6 55.7 60 54 07 09 22 07 11 08 NGC4151 18 44 41 17.3 -53.3 6.6 55.2 43 54 07 11 08 07 14 08 --- 18 47 41 16.8 -53.0 6.6 54.9 180 77 07 11 09 07 14 54 J1209+4119 18 48 27 17.6 -51.1 6.6 55.1 42 77 07 14 54 07 15 54 =1206+416 18 49 27 17.5 -51.0 6.7 55.0 60 85 07 14 55 07 16 41 NGC4151 18 50 15 16.4 -52.7 6.6 54.5 44 85 07 16 41 07 19 41 --- 18 53 15 16.0 -52.3 6.7 54.2 180 108 07 16 42 07 20 27 J1209+4119 18 54 01 16.8 -50.5 6.7 54.4 42 108 07 20 27 07 21 27 =1206+416 18 55 01 16.6 -50.4 6.7 54.2 60 115 07 20 28 07 22 15 NGC4151 18 55 49 15.6 -52.0 6.7 53.8 44 115 07 22 15 07 25 15 --- 18 58 50 15.1 -51.7 6.8 53.5 180 138 07 22 16 07 26 01 J1209+4119 18 59 36 15.9 -49.8 6.8 53.6 42 138 07 26 01 07 27 01 =1206+416 19 00 36 15.8 -49.7 6.8 53.5 60 146 07 26 02 07 27 48 NGC4151 19 01 24 14.7 -51.4 6.8 53.1 44 146 07 27 48 07 30 48 --- 19 04 24 14.2 -51.0 6.9 52.7 180 169 07 27 49 07 31 34 J1209+4119 19 05 10 15.1 -49.2 6.9 52.9 42 169 07 31 34 07 32 34 =1206+416 19 06 11 14.9 -49.1 6.9 52.8 60 177 07 31 35 07 33 22 NGC4151 19 06 59 13.8 -50.7 6.9 52.4 44 177 07 33 22 07 36 22 --- 19 09 59 13.4 -50.3 7.0 52.0 180 200 07 33 23 Schedule for KVNYS (Code Ky ) Page 3 The variable VLBI core of NGC 4151 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 7 Nov 2018 Day 311 --- 07 37 08 J1209+4119 19 10 45 14.3 -48.5 7.0 52.1 42 200 07 37 08 07 38 08 =1206+416 19 11 45 14.1 -48.4 7.0 52.0 60 208 07 37 09 07 38 56 NGC4151 19 12 33 13.0 -50.0 7.0 51.7 44 208 07 38 56 07 41 56 --- 19 15 34 12.5 -49.6 7.1 51.3 180 231 07 38 57 07 42 42 J1209+4119 19 16 19 13.4 -47.9 7.1 51.4 42 231 07 42 42 07 43 42 =1206+416 19 17 20 13.3 -47.7 7.1 51.2 60 238 07 42 43 07 44 29 NGC4151 19 18 07 12.1 -49.3 7.1 51.0 44 238 07 44 29 07 47 29 --- 19 21 08 11.7 -48.9 7.2 50.6 180 262 07 44 30 07 48 14 J1209+4119 19 21 53 12.6 -47.2 7.2 50.6 41 262 07 48 14 07 49 14 =1206+416 19 22 53 12.5 -47.1 7.2 50.5 60 269 07 48 15 07 50 01 NGC4151 19 23 41 11.3 -48.6 7.2 50.2 44 269 07 50 01 07 53 01 --- 19 26 41 10.9 -48.2 7.3 49.8 180 292 07 50 02 07 53 46 J1209+4119 19 27 25 11.8 -46.5 7.3 49.9 41 292 07 53 46 07 54 46 =1206+416 19 28 25 11.7 -46.4 7.3 49.7 60 300 07 53 47 07 55 32 NGC4151 19 29 12 10.5 -47.9 7.3 49.5 43 300 07 55 32 07 58 32 --- 19 32 13 10.0 -47.5 7.3 49.1 180 323 07 55 33 07 59 15 J1209+4119 19 32 56 11.0 -45.8 7.4 49.1 40 323 07 59 15 08 00 15 =1206+416 19 33 56 10.9 -45.7 7.4 48.9 60 331 07 59 16 08 01 01 NGC4151 19 34 42 9.7 -47.2 7.4 48.7 42 331 08 01 01 08 04 01 --- 19 37 42 9.2 -46.8 7.4 48.3 180 354 08 01 02 08 04 42 J1209+4119 19 38 24 10.3 -45.1 7.5 48.3 38 354 08 04 42 08 05 42 =1206+416 19 39 24 10.1 -45.0 7.5 48.2 60 362 08 04 43 08 06 26 NGC4151 19 40 08 8.9 -46.5 7.5 48.0 40 362 08 06 26 08 09 26 --- 19 43 08 8.5 -46.1 7.5 47.6 180 385 08 06 27 08 10 05 J1209+4119 19 43 48 9.5 -44.4 7.6 47.5 36 385 08 10 05 08 11 05 =1206+416 19 44 48 9.4 -44.3 7.6 47.4 60 392 08 10 06 08 11 47 NGC4151 19 45 30 8.1 -45.8 7.6 47.2 38 392 08 11 47 08 14 47 --- 19 48 30 7.7 -45.4 7.6 46.8 180 415 08 11 48 08 15 24 J1209+4119 19 49 07 8.8 -43.7 7.6 46.8 33 415 08 15 24 08 16 24 =1206+416 19 50 07 8.6 -43.6 7.7 46.6 60 423 08 15 25 Schedule for KVNYS (Code Ky ) Page 4 The variable VLBI core of NGC 4151 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 7 Nov 2018 Day 311 --- 08 17 02 NGC4151 19 50 46 7.4 -45.1 7.7 46.5 35 423 08 17 02 08 20 02 --- 19 53 46 7.0 -44.7 7.7 46.1 180 446 08 17 03 08 20 39 J1209+4119 19 54 23 8.1 -43.0 7.7 46.0 33 446 08 20 39 08 21 39 =1206+416 19 55 23 7.9 -42.9 7.8 45.9 60 454 08 20 40 08 22 16 NGC4151 19 56 00 6.7 -44.4 7.7 45.8 33 454 08 22 16 08 25 16 --- 19 59 01 6.2 -44.0 7.8 45.3 180 477 08 22 17 08 27 22 3C286 20 01 08 12.8 -61.3 6.5 53.7 118 477 08 27 22 08 29 22 --- 20 03 08 12.5 -61.1 6.5 53.5 120 492 08 27 23 08 33 14 J1209+4119 20 07 00 6.4 -41.4 7.9 44.1 222 492 08 33 14 08 34 14 =1206+416 20 08 00 6.2 -41.2 8.0 44.0 60 500 08 33 15 08 38 27 J1209+4119 20 12 14 5.7 -40.6 8.0 43.4 251 500 08 38 27 08 39 27 =1206+416 20 13 15 5.6 -40.5 8.0 43.2 60 508 08 38 28 08 43 44 J1209+4119 20 17 32 5.0 -39.9 8.1 42.5 255 508 08 43 44 08 44 44 =1206+416 20 18 32 4.9 -39.8 8.1 D 42.4 0 515 08 43 45 SETUP FILE INFORMATION: NOTE: If DOPPLER, FREQ, or BW were used, see the individual scans for the final BBC settings. ======== Setup file: sess318.K1024 --- 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: 16 Station: KVNYS Total bit rate: 1024 Format: MARK5B Bits per sample: 2 Sample rate: 32.000 Number of channels: 16 DBE type: Speedup factor: 1.00 Disk used to record data. 1st LO= 31200.00 31200.00 31200.00 31200.00 31200.00 31200.00 31200.00 31200.00 31200.00 31200.00 31200.00 31200.00 31200.00 31200.00 31200.00 31200.00 Net SB= L L U U L L U U L L U U L L U U IF SB = L L L L L L L L L L L L L L L L Pol. = RCP LCP RCP LCP RCP LCP RCP LCP RCP LCP RCP LCP RCP LCP RCP LCP BBC = 2 1 2 1 2 1 2 1 2 1 2 1 2 1 2 1 BBC SB= U U L L U U L L U U L L U U L L IF = D C D C D C D C D C D C D C D C The following frequency sets based on these setups were used. Frequency Set: 15 Setup file default. Used with PCAL = off LO sum= 22187.49 22187.49 22187.49 22187.49 22219.49 22219.49 22219.49 22219.49 22251.49 22251.49 22251.49 22251.49 22283.49 22283.49 22283.49 22283.49 BBC fr= 9012.51 9012.51 9012.51 9012.51 8980.51 8980.51 8980.51 8980.51 8948.51 8948.51 8948.51 8948.51 8916.51 8916.51 8916.51 8916.51 Bandwd= 16.00 16.00 16.00 16.00 16.00 16.00 16.00 16.00 16.00 16.00 16.00 16.00 16.00 16.00 16.00 16.00 Matching frequency sets: 15 16 17 Track assignments are: track1= 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, 28, 30, 32 barrel=roll_off POSITIONS OF SOURCES USED IN RECORDING SCANS Source Source position (RA/Dec) Error (B1950) (J2000) (Date) (mas) * NGC4151 12 08 01.055801 * 12 10 32.583400 12 11 27.093464 0.00 39 41 02.10308 * 39 24 21.03100 39 18 06.07593 0.00 From catalog imbedded in main SCHED input file. 1206+416 12 06 51.117947 * 12 09 22.788006 12 10 17.293473 0.17 * J1209+4119 41 36 22.62761 * 41 19 41.37011 41 13 25.77323 0.16 /home/guest/rmc/SCHED/sched11.5/catalogs/sources.gsfc GSFC 2016a X/S astro solution, 150 observations. * 3C286 13 28 49.657769 * 13 31 08.288061 13 31 58.011500 0.17 J1331+3030 30 45 58.64066 * 30 30 32.95930 30 24 53.55359 0.16 1328+307 /home/guest/rmc/SCHED/sched11.5/catalogs/sources.gsfc J1331+30 GSFC 2016a X/S astro solution, 269 observations. 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 NGC4151 sess318.K1024 1 2 3 4 5 6 7 8 9 10 14 15 1.420 132.674 J1209+4119 sess318.K1024 1 2 3 4 5 6 7 8 9 10 14 15 0.500 48.924 3C286 sess318.K1024 1 2 3 4 5 6 7 8 9 10 14 15 0.100 11.666 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) NGC4151 66.7 J1209+4119 68.3 3C286 50.3 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