COVER INFORMATION Station: ZELENCHK (Code Zc ) Experiment: The variable VLBI core of NGC 4151 Exp. Code: EP113F 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 3.6cm Notes: Target: NGC4151 Phase calibrator : J1209+4119 D-terms calibrator : -- Fringe finder : 3C286 Schedule for ZELENCHK (Code Zc ) 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 12 Jun 2019 Day 163 --- Next scan frequencies: 8319.49 8319.49 8319.49 8319.49 8383.49 8383.49 8383.49 8383.49 8447.49 8447.49 8447.49 8447.49 8511.49 8511.49 8511.49 8511.49 Next BBC frequencies: 239.49 239.49 239.49 239.49 303.49 303.49 303.49 303.49 367.49 367.49 367.49 367.49 431.49 431.49 431.49 431.49 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 18 00 00 3C286 14 09 22 74.7 572.0 0.6 26.4 0 0 18 00 00 18 02 00 --- 14 11 22 74.5 573.5 0.7 27.5 120 31 18 00 01 18 03 55 J1209+4119 14 13 17 67.3 634.2 2.0 73.2 29 31 18 03 55 18 05 55 =1206+416 14 15 18 67.0 634.5 2.1 73.1 120 62 18 03 56 18 05 55 NGC4151 14 15 18 66.6 629.7 2.1 68.9 -24 62 No stop 18 11 55 --- 14 21 19 65.5 630.7 2.2 68.9 336 154 18 05 56 18 11 55 J1209+4119 14 21 19 65.9 635.3 2.2 72.9 -24 154 No stop 18 13 55 =1206+416 14 23 19 65.5 635.6 2.2 72.8 96 185 18 11 56 18 13 55 NGC4151 14 23 19 65.1 631.1 2.2 68.9 -24 185 No stop 18 19 55 --- 14 29 20 64.0 632.1 2.3 68.8 336 277 18 13 56 18 20 30 J1209+4119 14 29 55 64.3 636.5 2.3 72.5 11 277 18 20 30 18 22 30 =1206+416 14 31 55 64.0 636.7 2.4 72.4 120 308 18 20 31 18 22 30 NGC4151 14 31 55 63.6 632.5 2.3 68.8 -23 308 No stop 18 28 30 --- 14 37 56 62.5 633.4 2.4 68.6 337 400 18 22 31 18 28 30 J1209+4119 14 37 56 62.9 637.5 2.5 72.1 -23 400 No stop 18 30 30 =1206+416 14 39 57 62.5 637.8 2.5 72.0 97 431 18 28 31 18 30 30 NGC4151 14 39 57 62.1 633.7 2.5 68.6 -23 431 No stop 18 36 30 --- 14 45 58 61.0 634.6 2.6 68.4 337 523 18 30 31 18 37 05 J1209+4119 14 46 33 61.4 638.6 2.6 71.6 12 523 18 37 05 18 39 05 =1206+416 14 48 33 61.0 638.8 2.6 71.5 120 554 18 37 06 18 39 05 NGC4151 14 48 33 60.6 635.0 2.6 68.3 -22 554 No stop 18 45 05 --- 14 54 34 59.5 635.8 2.7 68.1 338 646 18 39 06 18 45 05 J1209+4119 14 54 34 59.9 639.6 2.7 71.2 -22 646 No stop 18 47 05 =1206+416 14 56 34 59.6 639.8 2.8 71.0 98 677 18 45 06 18 47 05 NGC4151 14 56 34 59.1 636.1 2.8 68.1 -22 677 No stop 18 53 05 --- 15 02 35 58.0 637.0 2.9 67.8 338 769 18 47 06 Schedule for ZELENCHK (Code Zc ) 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 12 Jun 2019 Day 163 --- 18 53 40 J1209+4119 15 03 10 58.4 640.6 2.9 70.6 13 769 18 53 40 18 55 40 =1206+416 15 05 11 58.1 640.8 2.9 70.5 120 800 18 53 41 18 55 40 NGC4151 15 05 11 57.6 637.3 2.9 67.7 -22 800 No stop 19 01 40 --- 15 11 12 56.5 638.1 3.0 67.4 338 892 18 55 41 19 01 40 J1209+4119 15 11 12 57.0 641.6 3.0 70.1 -22 892 No stop 19 03 40 =1206+416 15 13 12 56.6 641.8 3.0 70.0 98 923 19 01 41 19 03 40 NGC4151 15 13 12 56.1 638.4 3.0 67.4 -21 923 No stop 19 09 40 --- 15 19 13 55.1 639.2 3.1 67.1 339 1015 19 03 41 19 10 15 J1209+4119 15 19 48 55.5 642.6 3.2 69.5 14 1015 19 10 15 19 12 15 =1206+416 15 21 48 55.1 642.8 3.2 69.4 120 1046 19 10 16 19 14 25 3C286 15 23 59 64.2 608.2 1.9 51.0 70 1046 19 14 25 19 16 35 --- 15 26 09 63.8 608.9 1.9 51.4 130 1079 19 14 26 19 18 55 J1209+4119 15 28 30 53.9 643.6 3.3 68.9 81 1079 19 18 55 19 20 55 =1206+416 15 30 30 53.6 643.8 3.3 68.8 120 1110 19 18 56 19 20 55 NGC4151 15 30 30 53.1 640.7 3.3 66.5 -21 1110 No stop 19 26 55 --- 15 36 31 52.0 641.4 3.4 66.1 339 1203 19 20 56 19 26 55 J1209+4119 15 36 31 52.5 644.5 3.4 68.3 -21 1203 No stop 19 28 55 =1206+416 15 38 31 52.2 644.7 3.5 68.2 99 1233 19 26 56 19 28 55 NGC4151 15 38 31 51.6 641.7 3.5 66.0 -20 1233 No stop 19 34 55 --- 15 44 32 50.6 642.5 3.6 65.6 340 1326 19 28 56 19 35 30 J1209+4119 15 45 07 51.0 645.5 3.6 67.7 15 1326 19 35 30 19 37 30 =1206+416 15 47 08 50.7 645.7 3.6 67.5 120 1356 19 35 31 19 37 30 NGC4151 15 47 08 50.1 642.8 3.6 65.5 -20 1356 No stop 19 43 30 --- 15 53 09 49.1 643.5 3.7 65.1 340 1449 19 37 31 19 43 30 J1209+4119 15 53 09 49.6 646.4 3.7 67.1 -20 1449 No stop 19 45 30 =1206+416 15 55 09 49.3 646.6 3.7 66.9 100 1479 19 43 31 19 45 30 NGC4151 15 55 09 48.7 643.8 3.7 65.0 -20 1479 No stop 19 51 30 --- 16 01 10 47.7 644.5 3.8 64.6 340 1572 19 45 31 19 52 05 J1209+4119 16 01 45 48.2 647.3 3.9 66.4 15 1572 19 52 05 19 54 05 =1206+416 16 03 45 47.8 647.6 3.9 66.2 120 1603 19 52 06 Schedule for ZELENCHK (Code Zc ) 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 12 Jun 2019 Day 163 --- 19 54 05 NGC4151 16 03 45 47.2 644.8 3.9 64.4 -20 1603 No stop 19 58 00 --- 16 07 41 46.5 645.3 3.9 64.1 215 1663 19 54 06 19 58 00 J1209+4119 16 07 41 47.1 648.0 4.0 65.9 -20 1663 No stop 20 00 00 =1206+416 16 09 41 46.8 648.2 4.0 65.7 100 1694 19 58 01 SETUP FILE INFORMATION: NOTE: If DOPPLER, FREQ, or BW were used, see the individual scans for the final BBC settings. ======== Setup file: sess219.X2048 Matching groups in /home/guest/rmc/SCHED/sched11.5/catalogs/freq_RDBE.dat: kvzr_x Added by Des Small, 24 February 2012 Setup group: 2 Station: ZELENCHK Total bit rate: 2048 Format: MARK5B Bits per sample: 2 Sample rate: 64.000 Number of channels: 16 DBE type: Speedup factor: 1.00 Disk used to record data. 1st LO= 8080.00 8080.00 8080.00 8080.00 8080.00 8080.00 8080.00 8080.00 8080.00 8080.00 8080.00 8080.00 8080.00 8080.00 8080.00 8080.00 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 = A B A B A B A B A B A B A B A B The following frequency sets based on these setups were used. Frequency Set: 9 Setup file default. Used with PCAL = off LO sum= 8319.49 8319.49 8319.49 8319.49 8383.49 8383.49 8383.49 8383.49 8447.49 8447.49 8447.49 8447.49 8511.49 8511.49 8511.49 8511.49 BBC fr= 239.49 239.49 239.49 239.49 303.49 303.49 303.49 303.49 367.49 367.49 367.49 367.49 431.49 431.49 431.49 431.49 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: 9 10 11 Track assignments are: track1= 18, 26, 2, 10, 20, 28, 4, 12, 22, 30, 6, 14, 24, 32, 8, 16 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 30.484050 0.00 39 41 02.10308 * 39 24 21.03100 39 18 10.21078 0.00 From catalog imbedded in main SCHED input file. 1206+416 12 06 51.117947 * 12 09 22.788006 12 10 20.719005 0.17 * J1209+4119 41 36 22.62761 * 41 19 41.37011 41 13 30.98937 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 01.889576 0.17 J1331+3030 30 45 58.64066 * 30 30 32.95930 30 24 49.12056 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 sess219.X2048 1 2 3 4 5 7 8 9 1.265 60.939 J1209+4119 sess219.X2048 1 2 3 4 5 7 8 9 0.500 23.308 3C286 sess219.X2048 1 2 3 4 5 6 7 8 9 0.069 3.547 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 84.2 J1209+4119 83.2 3C286 102.9 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