COVER INFORMATION Station: ONSALA60 (Code O6 ) Experiment: The variable VLBI core of NGC 4151 Exp. Code: EP113A 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 (1024 Mb/s) Notes: Target: NGC4151 Phase calibrator : J1209+4119 D-terms calibrator : -- Fringe finder : 3C286 Schedule for ONSALA60 (Code O6 ) 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 ---------------------------------------------------------------------------------------- --- Tue 30 Oct 2018 Day 303 --- Next scan frequencies: 8367.49 8367.49 8367.49 8367.49 8399.49 8399.49 8399.49 8399.49 8431.49 8431.49 8431.49 8431.49 8463.49 8463.49 8463.49 8463.49 Next BBC frequencies: 287.49 287.49 287.49 287.49 319.49 319.49 319.49 319.49 351.49 351.49 351.49 351.49 383.49 383.49 383.49 383.49 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 30 00 3C286 10 52 00 51.5 477.1 -2.7 -33.8 0 0 07 30 00 07 32 00 --- 10 54 00 51.7 477.7 -2.6 -33.6 120 15 07 30 01 07 33 49 J1209+4119 10 55 49 69.9 495.6 -1.2 -30.1 83 15 07 33 49 07 34 49 =1206+416 10 56 49 70.0 496.1 -1.2 -29.8 60 23 07 33 50 07 35 36 NGC4151 10 57 36 68.3 498.5 -1.2 -27.5 36 23 07 35 36 07 40 36 --- 11 02 37 68.7 500.9 -1.1 -26.1 300 62 07 35 37 07 41 21 J1209+4119 11 03 23 70.6 499.3 -1.1 -27.8 35 62 07 41 21 07 42 21 =1206+416 11 04 23 70.7 499.8 -1.1 -27.5 60 70 07 41 22 07 43 08 NGC4151 11 05 10 68.9 502.1 -1.1 -25.3 37 70 07 43 08 07 48 08 --- 11 10 11 69.3 504.6 -1.0 -23.8 300 108 07 43 09 07 48 54 J1209+4119 11 10 57 71.2 503.2 -1.0 -25.4 36 108 07 48 54 07 49 54 =1206+416 11 11 57 71.3 503.7 -1.0 -25.1 60 116 07 48 55 07 50 41 NGC4151 11 12 45 69.5 505.9 -1.0 -23.0 38 116 07 50 41 07 55 41 --- 11 17 45 69.9 508.5 -0.9 -21.4 300 155 07 50 42 07 56 27 J1209+4119 11 18 31 71.8 507.3 -0.9 -22.8 36 155 07 56 27 07 57 27 =1206+416 11 19 32 71.9 507.9 -0.8 -22.4 60 162 07 56 28 07 58 15 NGC4151 11 20 20 70.1 509.8 -0.9 -20.5 38 162 07 58 15 08 03 15 --- 11 25 20 70.4 512.5 -0.8 -18.7 300 201 07 58 16 08 04 01 J1209+4119 11 26 06 72.4 511.6 -0.7 -19.9 37 201 08 04 01 08 05 01 =1206+416 11 27 07 72.4 512.2 -0.7 -19.5 60 209 08 04 02 08 05 49 NGC4151 11 27 55 70.6 513.9 -0.7 -17.8 39 209 08 05 49 08 10 49 --- 11 32 55 70.9 516.8 -0.6 -16.0 300 247 08 05 50 08 11 35 J1209+4119 11 33 41 72.8 516.1 -0.6 -16.8 36 247 08 11 35 08 12 35 =1206+416 11 34 41 72.9 516.8 -0.6 -16.4 60 255 08 11 36 08 13 22 NGC4151 11 35 29 71.0 518.2 -0.6 -15.0 38 255 08 13 22 08 18 22 --- 11 40 30 71.2 521.1 -0.5 -13.0 300 294 08 13 23 Schedule for ONSALA60 (Code O6 ) 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 ---------------------------------------------------------------------------------------- --- Tue 30 Oct 2018 Day 303 --- 08 19 08 J1209+4119 11 41 15 73.2 520.8 -0.5 -13.6 36 294 08 19 08 08 20 08 =1206+416 11 42 16 73.2 521.5 -0.5 -13.2 60 301 08 19 09 08 20 55 NGC4151 11 43 03 71.3 522.6 -0.5 -12.0 38 301 08 20 55 08 25 55 --- 11 48 04 71.5 525.6 -0.4 -10.0 300 340 08 20 56 08 26 39 J1209+4119 11 48 48 73.5 525.7 -0.4 -10.2 35 340 08 26 39 08 27 39 =1206+416 11 49 48 73.5 526.3 -0.3 -9.7 60 348 08 26 40 08 28 25 NGC4151 11 50 34 71.6 527.1 -0.3 -8.9 37 348 08 28 25 08 33 25 --- 11 55 35 71.7 530.2 -0.3 -6.8 300 386 08 28 26 08 35 04 3C286 11 57 14 58.4 498.6 -1.6 -24.4 73 386 08 35 04 08 37 04 --- 11 59 15 58.6 499.3 -1.5 -24.0 120 402 08 35 05 08 38 48 J1209+4119 12 00 59 73.8 533.7 -0.2 -4.5 78 402 08 38 48 08 39 48 =1206+416 12 01 59 73.8 534.4 -0.1 -4.0 60 410 08 38 49 08 40 31 NGC4151 12 02 42 71.9 534.6 -0.1 -3.8 34 410 08 40 31 08 45 31 --- 12 07 43 71.9 537.7 -0.1 -1.6 300 448 08 40 32 08 46 07 J1209+4119 12 08 20 73.8 538.7 -0.0 -0.9 27 448 08 46 07 08 47 07 =1206+416 12 09 20 73.8 539.4 -0.0 -0.5 60 456 08 46 08 08 47 47 NGC4151 12 09 59 71.9 539.1 -0.0 -0.6 30 456 08 47 47 08 52 47 --- 12 15 00 71.9 542.2 0.1 1.5 300 495 08 47 48 08 53 23 J1209+4119 12 15 37 73.8 543.6 0.1 2.6 27 495 08 53 23 08 54 23 =1206+416 12 16 37 73.8 544.3 0.1 3.1 60 502 08 53 24 08 55 00 NGC4151 12 17 14 71.9 543.6 0.1 2.5 27 502 08 55 00 09 00 00 --- 12 22 15 71.8 546.7 0.2 4.7 300 541 08 55 01 09 00 37 J1209+4119 12 22 52 73.7 548.5 0.2 6.0 27 541 09 00 37 09 01 37 =1206+416 12 23 52 73.7 549.1 0.2 6.5 60 549 09 00 38 09 02 14 NGC4151 12 24 28 71.8 548.1 0.2 5.6 27 549 09 02 14 09 07 14 --- 12 29 29 71.7 551.2 0.3 7.7 300 587 09 02 15 09 07 50 J1209+4119 12 30 06 73.5 553.2 0.3 9.4 27 587 09 07 50 09 08 50 =1206+416 12 31 06 73.5 553.9 0.3 9.9 60 595 09 07 51 09 09 27 NGC4151 12 31 43 71.6 552.5 0.3 8.7 27 595 09 09 27 09 14 27 --- 12 36 44 71.4 555.5 0.4 10.7 300 634 09 09 28 Schedule for ONSALA60 (Code O6 ) 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 ---------------------------------------------------------------------------------------- --- Tue 30 Oct 2018 Day 303 --- 09 15 07 J1209+4119 12 37 24 73.3 557.9 0.5 12.8 30 634 09 15 07 09 16 07 =1206+416 12 38 24 73.2 558.6 0.5 13.2 60 642 09 15 08 09 16 45 NGC4151 12 39 02 71.4 556.9 0.5 11.7 27 642 09 16 45 09 21 41 --- 12 43 59 71.1 559.8 0.5 13.6 296 680 09 16 46 09 22 26 J1209+4119 12 44 44 72.9 562.5 0.6 15.9 34 680 09 22 26 09 23 26 =1206+416 12 45 44 72.9 563.2 0.6 16.4 60 687 09 22 27 09 28 00 3C286 12 50 20 62.1 520.6 -0.7 -12.0 245 687 09 28 00 09 30 00 --- 12 52 20 62.2 521.5 -0.7 -11.5 120 703 09 28 01 SETUP FILE INFORMATION: NOTE: If DOPPLER, FREQ, or BW were used, see the individual scans for the final BBC settings. ======== Setup file: sess318.X1024 --- 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: 6 Station: ONSALA60 Total bit rate: 1024 Format: VDIF Bits per sample: 2 Sample rate: 32.000 Number of channels: 16 DBE type: DBBC_DDC 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 = 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: 5 Setup file default. Used with PCAL = off LO sum= 8367.49 8367.49 8367.49 8367.49 8399.49 8399.49 8399.49 8399.49 8431.49 8431.49 8431.49 8431.49 8463.49 8463.49 8463.49 8463.49 BBC fr= 287.49 287.49 287.49 287.49 319.49 319.49 319.49 319.49 351.49 351.49 351.49 351.49 383.49 383.49 383.49 383.49 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: 5 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) * NGC4151 12 08 01.055801 * 12 10 32.583400 12 11 26.909382 0.00 39 41 02.10308 * 39 24 21.03100 39 18 08.37909 0.00 From catalog imbedded in main SCHED input file. 1206+416 12 06 51.117947 * 12 09 22.788006 12 10 17.104280 0.17 * J1209+4119 41 36 22.62761 * 41 19 41.37011 41 13 28.11266 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 57.913458 0.17 J1331+3030 30 45 58.64066 * 30 30 32.95930 30 24 55.82973 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.X1024 1 2 3 4 5 6 7 8 9 1.166 65.270 J1209+4119 sess318.X1024 1 2 3 4 5 6 7 8 9 0.250 14.663 3C286 sess318.X1024 1 2 3 4 5 6 7 8 9 0.100 6.599 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 60.8 J1209+4119 62.5 3C286 45.6 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