COVER INFORMATION Station: KVNTN (Code Kt ) Experiment: The variable VLBI core of NGC 4151 Exp. Code: EP113D 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 ---------------------------------------------------------------------------------------- --- Mon 11 Mar 2019 Day 70 --- 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 23 00 00 3C286 18 43 06 25.5 -69.0 5.2 64.8 0 0 23 00 00 23 02 00 --- 18 45 06 25.1 -68.8 5.2 64.7 120 15 23 00 01 23 04 20 J1209+4119 18 47 27 15.1 -50.3 6.6 58.7 131 15 23 04 20 23 06 20 =1206+416 18 49 27 14.8 -50.0 6.7 58.4 120 31 23 04 21 23 06 20 NGC4151 18 49 27 13.9 -51.9 6.6 58.2 -4 31 No stop 23 10 20 --- 18 53 28 13.3 -51.4 6.7 57.6 236 62 23 06 21 23 10 20 J1209+4119 18 53 28 14.1 -49.6 6.7 57.9 -4 62 No stop 23 12 20 =1206+416 18 55 28 13.8 -49.4 6.8 57.6 116 77 23 10 21 23 12 20 NGC4151 18 55 28 13.0 -51.2 6.7 57.4 -4 77 No stop 23 16 20 --- 18 59 29 12.3 -50.8 6.8 56.8 236 108 23 12 21 23 17 00 J1209+4119 19 00 09 13.1 -48.9 6.8 56.9 36 108 23 17 00 23 19 00 =1206+416 19 02 09 12.8 -48.7 6.9 56.6 120 123 23 17 01 23 19 00 NGC4151 19 02 09 11.9 -50.5 6.8 56.5 -4 123 No stop 23 23 00 --- 19 06 10 11.2 -50.1 6.9 55.9 236 154 23 19 01 23 23 00 J1209+4119 19 06 10 12.1 -48.3 6.9 56.1 -4 154 No stop 23 25 00 =1206+416 19 08 10 11.8 -48.1 7.0 55.8 116 169 23 23 01 23 25 00 NGC4151 19 08 10 10.9 -49.8 6.9 55.6 -4 169 No stop 23 29 00 --- 19 12 11 10.3 -49.4 7.0 55.1 236 200 23 25 01 23 29 40 J1209+4119 19 12 51 11.1 -47.6 7.0 55.1 36 200 23 29 40 23 31 40 =1206+416 19 14 51 10.8 -47.4 7.1 54.8 120 215 23 29 41 23 31 40 NGC4151 19 14 51 9.9 -49.1 7.1 54.7 -4 215 No stop 23 35 40 --- 19 18 52 9.2 -48.6 7.1 54.2 236 246 23 31 41 23 35 40 J1209+4119 19 18 52 10.2 -46.9 7.1 54.3 -4 246 No stop 23 37 40 =1206+416 19 20 52 9.9 -46.7 7.2 54.0 116 262 23 35 41 23 37 40 NGC4151 19 20 52 8.9 -48.4 7.2 53.9 -4 262 No stop 23 41 40 --- 19 24 53 8.3 -47.9 7.2 53.3 236 292 23 37 41 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 ---------------------------------------------------------------------------------------- --- Mon 11 Mar 2019 Day 70 --- 23 42 20 J1209+4119 19 25 33 9.2 -46.2 7.3 53.3 36 292 23 42 20 23 44 20 =1206+416 19 27 33 8.9 -45.9 7.3 53.0 120 308 23 42 21 23 44 20 NGC4151 19 27 33 7.9 -47.6 7.3 52.9 -3 308 No stop 23 48 20 --- 19 31 34 7.3 -47.1 7.3 52.4 237 338 23 44 21 23 48 20 J1209+4119 19 31 34 8.3 -45.5 7.4 52.4 -3 338 No stop 23 50 20 =1206+416 19 33 34 8.0 -45.2 7.4 52.1 117 354 23 48 21 23 50 20 NGC4151 19 33 34 6.9 -46.9 7.4 52.1 -3 354 No stop 23 54 20 --- 19 37 35 6.3 -46.4 7.4 51.5 237 385 23 50 21 23 55 00 J1209+4119 19 38 15 7.3 -44.7 7.5 51.4 37 385 23 55 00 23 57 00 =1206+416 19 40 15 7.0 -44.4 7.5 51.1 120 400 23 55 01 --- Start: Mon 11 Mar 2019 Day 70 -- Stop: Tue 12 Mar 2019 Day 71 --- 23 57 00 NGC4151 19 40 15 5.9 -46.1 7.5 51.1 -3 400 No stop 00 01 00 --- 19 44 16 5.3 -45.6 7.5 50.5 237 431 23 57 01 00 01 00 J1209+4119 19 44 16 6.4 -44.0 7.6 50.5 -3 431 No stop 00 03 00 =1206+416 19 46 16 6.1 -43.7 7.6 50.2 117 446 00 01 01 00 03 00 NGC4151 19 46 16 5.0 -45.3 7.6 50.2 -3 446 No stop 00 07 00 --- 19 50 17 4.4 -44.8 7.6 D 49.6 0 477 00 03 01 00 07 40 J1209+4119 19 50 57 5.4 -43.2 7.7 49.5 37 477 00 07 40 00 09 40 =1206+416 19 52 57 5.1 -42.9 7.7 H 49.2 0 492 00 07 41 00 37 20 3C286 20 20 42 7.2 -58.2 6.8 55.5 1651 492 00 37 20 00 40 00 --- 20 23 22 6.8 -57.9 6.9 55.2 160 513 00 37 21 SETUP FILE INFORMATION: NOTE: If DOPPLER, FREQ, or BW were used, see the individual scans for the final BBC settings. ======== Setup file: sess119.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 31.060957 0.00 39 41 02.10308 * 39 24 21.03100 39 17 54.18012 0.00 From catalog imbedded in main SCHED input file. 1206+416 12 06 51.117947 * 12 09 22.788006 12 10 21.343591 0.17 * J1209+4119 41 36 22.62761 * 41 19 41.37011 41 13 14.53916 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 32 01.677600 0.17 J1331+3030 30 45 58.64066 * 30 30 32.95930 30 24 33.31208 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 sess119.K1024 1 2 3 4 5 6 7 8 9 10 14 15 1.733 140.223 J1209+4119 sess119.K1024 1 2 3 4 5 6 7 8 9 10 14 15 0.933 77.892 3C286 sess119.K1024 1 2 3 4 5 6 7 8 9 10 14 15 0.078 9.942 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 142.8 J1209+4119 141.1 3C286 140.2 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