COVER INFORMATION Station: KVNTN (Code Kt ) 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 KVNTN (Code Kt ) 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 31 35 27.7 -70.2 5.0 65.8 0 0 07 00 00 07 02 00 --- 18 33 36 27.4 -70.0 5.0 65.6 120 15 07 00 01 07 03 49 J1209+4119 18 35 25 17.0 -51.4 6.4 60.3 100 15 07 03 49 07 04 49 =1206+416 18 36 25 16.9 -51.3 6.4 60.2 60 23 07 03 50 07 05 36 NGC4151 18 37 12 16.0 -53.1 6.4 59.8 43 23 07 05 36 07 08 36 --- 18 40 12 15.5 -52.8 6.5 59.4 180 46 07 05 37 07 09 21 J1209+4119 18 40 58 16.1 -50.9 6.5 59.6 42 46 07 09 21 07 10 21 =1206+416 18 41 58 16.0 -50.8 6.5 59.4 60 54 07 09 22 07 11 08 NGC4151 18 42 45 15.0 -52.5 6.5 59.0 43 54 07 11 08 07 14 08 --- 18 45 46 14.5 -52.2 6.6 58.6 180 77 07 11 09 07 14 54 J1209+4119 18 46 32 15.2 -50.3 6.6 58.8 42 77 07 14 54 07 15 54 =1206+416 18 47 32 15.1 -50.2 6.6 58.7 60 85 07 14 55 07 16 41 NGC4151 18 48 19 14.1 -52.0 6.6 58.3 44 85 07 16 41 07 19 41 --- 18 51 20 13.6 -51.6 6.7 57.9 180 108 07 16 42 07 20 27 J1209+4119 18 52 06 14.3 -49.8 6.7 58.0 42 108 07 20 27 07 21 27 =1206+416 18 53 06 14.2 -49.7 6.7 57.9 60 115 07 20 28 07 22 15 NGC4151 18 53 54 13.2 -51.4 6.7 57.6 44 115 07 22 15 07 25 15 --- 18 56 54 12.7 -51.1 6.8 57.2 180 138 07 22 16 07 26 01 J1209+4119 18 57 40 13.5 -49.2 6.8 57.3 42 138 07 26 01 07 27 01 =1206+416 18 58 40 13.3 -49.1 6.8 57.1 60 146 07 26 02 07 27 48 NGC4151 18 59 28 12.3 -50.8 6.8 56.8 44 146 07 27 48 07 30 48 --- 19 02 29 11.8 -50.4 6.9 56.4 180 169 07 27 49 07 31 34 J1209+4119 19 03 15 12.6 -48.6 6.9 56.5 42 169 07 31 34 07 32 34 =1206+416 19 04 15 12.4 -48.5 6.9 56.3 60 177 07 31 35 07 33 22 NGC4151 19 05 03 11.4 -50.2 6.9 56.1 44 177 07 33 22 07 36 22 --- 19 08 04 10.9 -49.8 6.9 55.6 180 200 07 33 23 Schedule for KVNTN (Code Kt ) 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 08 50 11.7 -48.0 7.0 55.7 42 200 07 37 08 07 38 08 =1206+416 19 09 50 11.5 -47.9 7.0 55.5 60 208 07 37 09 07 38 56 NGC4151 19 10 38 10.5 -49.5 7.0 55.3 44 208 07 38 56 07 41 56 --- 19 13 38 10.0 -49.2 7.0 54.9 180 231 07 38 57 07 42 42 J1209+4119 19 14 24 10.8 -47.4 7.1 54.9 42 231 07 42 42 07 43 42 =1206+416 19 15 24 10.7 -47.3 7.1 54.7 60 238 07 42 43 07 44 29 NGC4151 19 16 12 9.6 -48.9 7.1 54.5 44 238 07 44 29 07 47 29 --- 19 19 12 9.2 -48.6 7.1 54.1 180 262 07 44 30 07 48 14 J1209+4119 19 19 57 10.0 -46.8 7.2 54.1 41 262 07 48 14 07 49 14 =1206+416 19 20 58 9.8 -46.7 7.2 53.9 60 269 07 48 15 07 50 01 NGC4151 19 21 45 8.8 -48.3 7.2 53.7 44 269 07 50 01 07 53 01 --- 19 24 45 8.3 -47.9 7.2 53.3 180 292 07 50 02 07 53 46 J1209+4119 19 25 30 9.2 -46.2 7.3 53.3 41 292 07 53 46 07 54 46 =1206+416 19 26 30 9.0 -46.0 7.3 53.1 60 300 07 53 47 07 55 32 NGC4151 19 27 17 7.9 -47.6 7.3 53.0 43 300 07 55 32 07 58 32 --- 19 30 17 7.4 -47.3 7.3 52.5 180 323 07 55 33 07 59 15 J1209+4119 19 31 00 8.3 -45.5 7.3 52.5 39 323 07 59 15 08 00 15 =1206+416 19 32 00 8.2 -45.4 7.4 52.3 60 331 07 59 16 08 01 01 NGC4151 19 32 46 7.1 -47.0 7.4 52.2 42 331 08 01 01 08 04 01 --- 19 35 47 6.6 -46.6 7.4 51.7 180 354 08 01 02 08 04 42 J1209+4119 19 36 28 7.5 -44.9 7.4 51.7 38 354 08 04 42 08 05 42 =1206+416 19 37 28 7.4 -44.8 7.5 51.5 60 362 08 04 43 08 06 26 NGC4151 19 38 12 6.2 -46.3 7.4 51.4 40 362 08 06 26 08 09 26 --- 19 41 13 5.8 -46.0 7.5 50.9 180 385 08 06 27 08 10 05 J1209+4119 19 41 52 6.7 -44.2 7.5 50.8 36 385 08 10 05 08 11 05 =1206+416 19 42 52 6.6 -44.1 7.5 50.7 60 392 08 10 06 08 11 47 NGC4151 19 43 34 5.4 -45.7 7.5 50.6 38 392 08 11 47 08 14 47 --- 19 46 35 5.0 -45.3 7.6 D 50.2 0 415 08 11 48 08 15 24 J1209+4119 19 47 11 6.0 -43.6 7.6 50.0 33 415 08 15 24 08 16 24 =1206+416 19 48 11 5.8 -43.5 7.6 49.9 60 423 08 15 25 Schedule for KVNTN (Code Kt ) 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 20 39 J1209+4119 19 52 28 5.2 -43.0 7.7 H 49.2 253 423 08 20 39 08 21 39 =1206+416 19 53 28 5.1 -42.8 7.7 H 49.1 0 431 08 20 40 08 27 22 3C286 19 59 12 11.1 -60.8 6.5 57.8 334 431 08 27 22 08 29 22 --- 20 01 12 10.7 -60.5 6.5 57.6 120 446 08 27 23 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: 15 Station: KVNTN 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