COVER INFORMATION Station: MEDICINA (Code Mc ) 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 MEDICINA (Code Mc ) 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 12 09 41 68.5 484.1 -1.4 -43.2 0 0 18 00 00 18 02 00 --- 12 11 42 68.8 484.9 -1.3 -42.7 120 31 18 00 01 18 03 55 J1209+4119 12 13 37 86.7 550.6 0.1 10.0 25 31 18 03 55 18 05 55 =1206+416 12 15 37 86.6 556.8 0.1 15.9 120 62 18 03 56 18 05 55 NGC4151 12 15 37 84.7 548.7 0.1 8.0 -14 62 No stop 18 11 55 --- 12 21 38 84.5 560.7 0.2 19.0 346 155 18 05 56 18 11 55 J1209+4119 12 21 38 86.1 573.1 0.2 31.2 -21 155 No stop 18 13 55 =1206+416 12 23 38 85.9 577.6 0.2 35.4 99 185 18 11 56 18 13 55 NGC4151 12 23 38 84.3 564.4 0.2 22.4 -21 185 No stop 18 19 55 --- 12 29 39 83.8 574.4 0.3 31.4 339 278 18 13 56 18 20 30 J1209+4119 12 30 15 85.1 589.6 0.3 46.2 11 278 18 20 30 18 22 30 =1206+416 12 32 15 84.8 592.5 0.4 48.8 120 309 18 20 31 18 22 30 NGC4151 12 32 15 83.5 578.2 0.3 34.8 -22 309 No stop 18 28 30 --- 12 38 16 82.8 585.9 0.4 41.5 338 402 18 22 31 18 28 30 J1209+4119 12 38 16 83.9 599.6 0.5 54.9 -23 402 No stop 18 30 30 =1206+416 12 40 16 83.6 601.6 0.5 56.5 97 433 18 28 31 18 30 30 NGC4151 12 40 16 82.5 588.2 0.5 43.4 -21 433 No stop 18 36 30 --- 12 46 17 81.7 594.1 0.6 48.3 339 526 18 30 31 18 37 05 J1209+4119 12 46 52 82.5 606.9 0.6 60.7 14 526 18 37 05 18 39 05 =1206+416 12 48 53 82.2 608.3 0.6 61.8 120 556 18 37 06 18 39 05 NGC4151 12 48 53 81.3 596.3 0.6 50.1 -20 556 No stop 18 45 05 --- 12 54 54 80.4 600.8 0.7 53.6 340 649 18 39 06 18 45 05 J1209+4119 12 54 54 81.2 611.9 0.7 64.3 -19 649 No stop 18 47 05 =1206+416 12 56 54 80.9 612.9 0.8 65.0 101 680 18 45 06 18 47 05 NGC4151 12 56 54 80.1 602.2 0.8 54.6 -18 680 No stop 18 53 05 --- 13 02 55 79.1 605.8 0.9 57.2 342 773 18 47 06 Schedule for MEDICINA (Code Mc ) 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 13 03 30 79.7 615.9 0.9 66.9 18 773 18 53 40 18 55 40 =1206+416 13 05 30 79.4 616.7 0.9 67.3 120 804 18 53 41 18 55 40 NGC4151 13 05 30 78.7 607.2 0.9 58.1 -16 804 No stop 19 01 40 --- 13 11 31 77.7 610.1 1.0 60.1 344 897 18 55 41 19 01 40 J1209+4119 13 11 31 78.3 618.9 1.0 68.5 -16 897 No stop 19 03 40 =1206+416 13 13 32 78.0 619.6 1.1 68.8 104 927 19 01 41 19 03 40 NGC4151 13 13 32 77.4 611.0 1.0 60.6 -15 927 No stop 19 09 40 --- 13 19 33 76.3 613.5 1.1 62.0 345 1020 19 03 41 19 10 15 J1209+4119 13 20 08 76.8 621.6 1.2 69.7 20 1020 19 10 15 19 12 15 =1206+416 13 22 08 76.5 622.2 1.2 69.9 120 1051 19 10 16 19 14 25 3C286 13 24 18 75.8 533.2 -0.1 -5.6 7 1051 19 14 25 19 16 35 --- 13 26 29 75.9 535.1 -0.1 -4.1 130 1085 19 14 26 19 18 55 J1209+4119 13 28 49 75.3 623.9 1.3 70.5 18 1085 19 18 55 19 20 55 =1206+416 13 30 49 74.9 624.4 1.3 70.6 120 1116 19 18 56 19 20 55 NGC4151 13 30 49 74.4 617.4 1.3 64.0 -13 1116 No stop 19 26 55 --- 13 36 50 73.3 619.2 1.4 64.8 347 1208 19 20 56 19 26 55 J1209+4119 13 36 50 73.9 625.8 1.4 71.0 -13 1208 No stop 19 28 55 =1206+416 13 38 51 73.5 626.2 1.5 71.1 107 1239 19 26 56 19 28 55 NGC4151 13 38 51 73.0 619.8 1.5 65.1 -12 1239 No stop 19 34 55 --- 13 44 52 71.9 621.4 1.6 65.6 348 1332 19 28 56 19 35 30 J1209+4119 13 45 27 72.3 627.6 1.6 71.3 23 1332 19 35 30 19 37 30 =1206+416 13 47 27 72.0 628.0 1.6 71.3 120 1363 19 35 31 19 37 30 NGC4151 13 47 27 71.5 622.0 1.6 65.9 -12 1363 No stop 19 43 30 --- 13 53 28 70.4 623.5 1.7 66.3 348 1456 19 37 31 19 43 30 J1209+4119 13 53 28 70.9 629.1 1.7 71.4 -11 1456 No stop 19 45 30 =1206+416 13 55 29 70.5 629.5 1.8 71.4 109 1487 19 43 31 19 45 30 NGC4151 13 55 29 70.1 623.9 1.7 66.4 -11 1487 No stop 19 51 30 --- 14 01 29 69.0 625.3 1.8 66.7 349 1579 19 45 31 19 52 05 J1209+4119 14 02 05 69.4 630.6 1.9 71.4 24 1579 19 52 05 19 54 05 =1206+416 14 04 05 69.0 631.0 1.9 71.4 120 1610 19 52 06 Schedule for MEDICINA (Code Mc ) 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 14 04 05 68.5 625.8 1.9 66.8 -11 1610 No stop 19 58 00 --- 14 08 01 67.8 626.6 1.9 66.9 224 1671 19 54 06 19 58 00 J1209+4119 14 08 01 68.3 631.6 2.0 71.4 -11 1671 No stop 20 00 00 =1206+416 14 10 01 68.0 632.0 2.0 71.3 109 1702 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 --- 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: 9 Station: MEDICINA Total bit rate: 2048 Format: VDIF Bits per sample: 2 Sample rate: 64.000 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 = 9 1 9 1 10 2 10 2 11 3 11 3 12 4 12 4 BBC SB= L L U U L L U U L L U U L L U U IF = C1 A1 C1 A1 C1 A1 C1 A1 C1 A1 C1 A1 C1 A1 C1 A1 The following frequency sets based on these setups were used. Frequency Set: 3 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: 3 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 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