COVER INFORMATION Station: JODRELL2 (Code Jb ) 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 JODRELL2 (Code Jb ) 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: 836.51 836.51 836.51 836.51 804.51 804.51 804.51 804.51 772.51 772.51 772.51 772.51 740.51 740.51 740.51 740.51 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 10 08 03 46.9 101.1 -3.4 -42.9 0 0 23 00 00 23 02 00 --- 10 10 03 47.2 101.6 -3.4 -42.8 120 15 23 00 01 23 04 20 J1209+4119 10 12 23 66.9 109.4 -2.0 -48.7 64 15 23 04 20 23 06 20 =1206+416 10 14 24 67.2 110.0 -1.9 -48.4 120 31 23 04 21 23 06 20 NGC4151 10 14 24 65.7 113.1 -2.0 -45.3 -31 31 No stop 23 10 20 --- 10 18 24 66.2 114.5 -1.9 -44.7 209 62 23 06 21 23 10 20 J1209+4119 10 18 24 67.7 111.3 -1.9 -47.8 -29 62 No stop 23 12 20 =1206+416 10 20 25 68.0 112.0 -1.8 -47.6 91 77 23 10 21 23 12 20 NGC4151 10 20 25 66.5 115.2 -1.9 -44.4 -31 77 No stop 23 16 20 --- 10 24 25 67.1 116.6 -1.8 -43.8 209 108 23 12 21 23 17 00 J1209+4119 10 25 05 68.7 113.6 -1.8 -46.8 10 108 23 17 00 23 19 00 =1206+416 10 27 06 68.9 114.3 -1.7 -46.5 120 124 23 17 01 23 19 00 NGC4151 10 27 06 67.4 117.5 -1.7 -43.3 -31 124 No stop 23 23 00 --- 10 31 06 67.9 119.0 -1.7 -42.5 209 155 23 19 01 23 23 00 J1209+4119 10 31 06 69.5 115.8 -1.7 -45.8 -30 155 No stop 23 25 00 =1206+416 10 33 07 69.7 116.5 -1.6 -45.4 90 170 23 23 01 23 25 00 NGC4151 10 33 07 68.2 119.8 -1.6 -42.2 -31 170 No stop 23 29 00 --- 10 37 07 68.7 121.4 -1.6 -41.3 209 201 23 25 01 23 29 40 J1209+4119 10 37 47 70.4 118.4 -1.5 -44.4 10 201 23 29 40 23 31 40 =1206+416 10 39 48 70.6 119.2 -1.5 -44.0 120 216 23 29 41 23 31 40 NGC4151 10 39 48 69.1 122.5 -1.5 -40.7 -32 216 No stop 23 35 40 --- 10 43 48 69.6 124.1 -1.5 -39.8 208 247 23 31 41 23 35 40 J1209+4119 10 43 48 71.2 120.9 -1.4 -43.1 -30 247 No stop 23 37 40 =1206+416 10 45 49 71.4 121.7 -1.4 -42.6 90 263 23 35 41 23 37 40 NGC4151 10 45 49 69.8 125.0 -1.4 -39.3 -32 263 No stop 23 41 40 --- 10 49 49 70.3 126.8 -1.4 -38.3 208 294 23 37 41 Schedule for JODRELL2 (Code Jb ) 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 10 50 30 72.0 123.8 -1.3 -41.4 10 294 23 42 20 23 44 20 =1206+416 10 52 30 72.2 124.7 -1.3 -40.8 120 309 23 42 21 23 44 20 NGC4151 10 52 30 70.6 128.0 -1.3 -37.6 -32 309 No stop 23 48 20 --- 10 56 31 71.1 129.9 -1.3 -36.4 208 340 23 44 21 23 48 20 J1209+4119 10 56 31 72.7 126.6 -1.2 -39.7 -29 340 No stop 23 50 20 =1206+416 10 58 31 73.0 127.6 -1.2 -39.1 91 356 23 48 21 23 50 20 NGC4151 10 58 31 71.3 130.9 -1.2 -35.8 -31 356 No stop 23 54 20 --- 11 02 32 71.8 132.9 -1.1 -34.5 209 386 23 50 21 23 55 00 J1209+4119 11 03 12 73.5 130.0 -1.1 -37.5 11 386 23 55 00 23 57 00 =1206+416 11 05 12 73.7 131.1 -1.1 -36.9 120 402 23 55 01 --- Start: Mon 11 Mar 2019 Day 70 -- Stop: Tue 12 Mar 2019 Day 71 --- 23 57 00 NGC4151 11 05 12 72.0 134.2 -1.1 -33.6 -31 402 No stop 00 01 00 --- 11 09 13 72.5 136.4 -1.0 -32.2 209 433 23 57 01 00 01 00 J1209+4119 11 09 13 74.2 133.3 -1.0 -35.4 -29 433 No stop 00 03 00 =1206+416 11 11 13 74.4 134.4 -1.0 -34.6 91 448 00 01 01 00 03 00 NGC4151 11 11 13 72.7 137.5 -1.0 -31.5 -31 448 No stop 00 07 00 --- 11 15 14 73.1 139.7 -0.9 -30.0 209 479 00 03 01 00 07 40 J1209+4119 11 15 54 74.9 137.2 -0.9 -32.7 12 479 00 07 40 00 09 40 =1206+416 11 17 54 75.1 138.4 -0.9 -31.9 120 495 00 07 41 00 09 40 NGC4151 11 17 54 73.3 141.3 -0.9 -28.9 -30 495 No stop 00 13 40 --- 11 21 55 73.7 143.7 -0.8 -27.2 210 526 00 09 41 00 13 40 J1209+4119 11 21 55 75.5 141.0 -0.8 -30.1 -27 526 No stop 00 15 40 =1206+416 11 23 55 75.7 142.3 -0.8 -29.1 93 541 00 13 41 00 15 40 NGC4151 11 23 55 73.9 145.0 -0.8 -26.4 -29 541 No stop 00 19 40 --- 11 27 56 74.2 147.5 -0.7 -24.6 211 572 00 15 41 00 20 20 J1209+4119 11 28 36 76.1 145.5 -0.7 -26.8 14 572 00 20 20 00 22 20 =1206+416 11 30 36 76.3 146.9 -0.7 -25.8 120 587 00 20 21 00 22 20 NGC4151 11 30 36 74.4 149.2 -0.7 -23.3 -28 587 No stop 00 26 20 --- 11 34 37 74.7 151.9 -0.6 -21.3 212 618 00 22 21 Schedule for JODRELL2 (Code Jb ) 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 12 Mar 2019 Day 71 --- 00 26 20 J1209+4119 11 34 37 76.6 149.8 -0.6 -23.6 -23 618 No stop 00 28 20 =1206+416 11 36 37 76.7 151.3 -0.6 -22.5 97 634 00 26 21 00 28 20 NGC4151 11 36 37 74.8 153.3 -0.6 -20.3 -26 634 No stop 00 32 20 --- 11 40 38 75.1 156.2 -0.5 -18.2 214 665 00 28 21 00 33 00 J1209+4119 11 41 18 77.0 154.9 -0.5 -19.7 19 665 00 33 00 00 35 00 =1206+416 11 43 18 77.2 156.5 -0.5 -18.5 120 680 00 33 01 00 37 20 3C286 11 45 39 60.1 129.2 -1.8 -32.5 34 680 00 37 20 00 40 00 --- 11 48 19 60.4 130.2 -1.7 -32.0 160 701 00 37 21 00 42 00 J1209+4119 11 50 19 77.5 162.3 -0.3 -14.0 1 701 00 42 00 00 44 00 =1206+416 11 52 20 77.6 164.0 -0.3 -12.7 120 716 00 42 01 00 44 00 NGC4151 11 52 20 75.7 164.8 -0.3 -11.7 -21 716 No stop 00 48 00 --- 11 56 20 75.8 167.9 -0.3 -9.3 219 747 00 44 01 00 48 40 J1209+4119 11 57 00 77.8 168.1 -0.2 -9.5 19 747 00 48 40 00 50 40 =1206+416 11 59 01 77.8 169.8 -0.2 -8.1 120 763 00 48 41 00 50 40 NGC4151 11 59 01 75.9 170.0 -0.2 -7.7 -21 763 No stop 00 54 40 --- 12 03 01 76.0 173.2 -0.1 -5.3 219 794 00 50 41 00 54 40 J1209+4119 12 03 01 77.9 173.4 -0.1 -5.3 -21 794 No stop 00 56 40 =1206+416 12 05 02 78.0 175.2 -0.1 -3.8 99 809 00 54 41 00 56 40 NGC4151 12 05 02 76.0 174.8 -0.1 -4.0 -21 809 No stop 01 00 40 --- 12 09 02 76.1 178.0 -0.0 -1.5 219 840 00 56 41 01 01 20 J1209+4119 12 09 43 78.0 179.4 -0.0 -0.5 19 840 01 01 20 01 03 20 =1206+416 12 11 43 78.0 181.2 0.0 1.0 120 855 01 01 21 01 03 20 NGC4151 12 11 43 76.1 180.2 0.0 0.1 -21 855 No stop 01 07 20 --- 12 15 44 76.0 183.4 0.1 2.6 219 886 01 03 21 01 07 20 J1209+4119 12 15 44 78.0 184.8 0.1 3.9 -23 886 No stop 01 09 20 =1206+416 12 17 44 77.9 186.6 0.1 5.3 97 902 01 07 21 01 09 20 NGC4151 12 17 44 76.0 185.0 0.1 3.9 -21 902 No stop 01 13 20 --- 12 21 45 76.0 188.2 0.2 6.3 219 933 01 09 21 01 14 00 J1209+4119 12 22 25 77.8 190.8 0.2 8.6 13 933 01 14 00 01 16 00 =1206+416 12 24 25 77.8 192.6 0.2 10.0 120 948 01 14 01 Schedule for JODRELL2 (Code Jb ) Page 5 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 12 Mar 2019 Day 71 --- 01 16 00 NGC4151 12 24 25 75.9 190.3 0.2 7.9 -24 948 No stop 01 20 00 --- 12 28 26 75.8 193.4 0.3 10.3 216 979 01 16 01 01 20 00 J1209+4119 12 28 26 77.6 196.0 0.3 12.7 -29 979 No stop 01 22 00 =1206+416 12 30 26 77.5 197.7 0.3 14.0 91 994 01 20 01 01 22 00 NGC4151 12 30 26 75.7 195.0 0.3 11.5 -27 994 No stop 01 26 00 --- 12 34 27 75.5 198.0 0.4 13.8 213 1025 01 22 01 01 26 40 J1209+4119 12 35 07 77.3 201.6 0.4 17.0 9 1025 01 26 40 01 28 40 =1206+416 12 37 07 77.2 203.2 0.4 18.3 120 1041 01 26 41 01 28 40 NGC4151 12 37 07 75.4 200.0 0.4 15.3 -29 1041 No stop 01 32 40 --- 12 41 08 75.2 202.9 0.5 17.5 211 1072 01 28 41 01 32 40 J1209+4119 12 41 08 76.9 206.4 0.5 20.7 -33 1072 No stop 01 34 40 =1206+416 12 43 08 76.8 208.0 0.5 21.9 87 1087 01 32 41 01 34 40 NGC4151 12 43 08 75.1 204.4 0.5 18.6 -30 1087 No stop 01 38 40 --- 12 47 09 74.8 207.2 0.6 20.7 210 1118 01 34 41 01 39 20 J1209+4119 12 47 49 76.4 211.5 0.6 24.5 6 1118 01 39 20 01 41 20 =1206+416 12 49 49 76.3 212.9 0.7 25.6 120 1134 01 39 21 01 41 20 NGC4151 12 49 49 74.6 209.0 0.6 22.0 -32 1134 No stop 01 45 20 --- 12 53 50 74.3 211.7 0.7 24.0 208 1165 01 41 21 01 45 20 J1209+4119 12 53 50 75.9 215.7 0.7 27.7 -35 1165 No stop 01 47 20 =1206+416 12 55 50 75.8 217.1 0.8 28.7 85 1180 01 45 21 01 47 20 NGC4151 12 55 50 74.1 213.0 0.7 24.9 -33 1180 No stop 01 51 20 --- 12 59 51 73.8 215.5 0.8 26.7 207 1211 01 47 21 01 52 00 J1209+4119 13 00 31 75.3 220.1 0.8 30.9 4 1211 01 52 00 01 54 00 =1206+416 13 02 31 75.1 221.4 0.9 31.7 120 1226 01 52 01 01 54 00 NGC4151 13 02 31 73.6 217.1 0.9 27.8 -33 1226 No stop 01 58 00 --- 13 06 32 73.2 219.5 0.9 29.5 207 1257 01 54 01 01 58 00 J1209+4119 13 06 32 74.7 223.8 0.9 33.4 -36 1257 No stop 02 00 00 =1206+416 13 08 32 74.5 225.0 1.0 34.2 84 1273 01 58 01 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: 5 Station: JODRELL2 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= 23024.00 23024.00 23024.00 23024.00 23024.00 23024.00 23024.00 23024.00 23024.00 23024.00 23024.00 23024.00 23024.00 23024.00 23024.00 23024.00 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 = 1 9 1 9 2 10 2 10 3 11 3 11 4 12 4 12 BBC SB= U U L L U U L L U U L L U U L L IF = A2 B2 A2 B2 A2 B2 A2 B2 A2 B2 A2 B2 A2 B2 A2 B2 The following frequency sets based on these setups were used. Frequency Set: 1 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= 836.51 836.51 836.51 836.51 804.51 804.51 804.51 804.51 772.51 772.51 772.51 772.51 740.51 740.51 740.51 740.51 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: 1 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 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