COVER INFORMATION Station: VLA27 (Code Y ) Experiment: Probing pulsar emission with picoarcsecond precision - B1737+13 Exp. Code: GK049D Schedule Version: 1.00 Processed by SCHED version: 11.40 Release 11.4. March 14, 2015 PI: Franz Kirsten Address: Curtin Institute of Radio Astronomy Curtin University Perth Australia Phone: +61 8 9266 9103 EMAIL: franz.kirsten@curtin.edu.au Fax: +61 8 9266 9246 Phone during observation: +61 8 9266 9103 Observing mode: Continuum 90cm (256 Mb/s), pulsar gating Notes: Target pulsar bright enough to fringe on Fringe finder / bandpass cal: J1751+0939 PCAL off, AGC off at all stations power switching and AGC off also at VLA Schedule for VLA27 (Code Y ) Page 2 Probing pulsar emission with picoarcsecond precision - B1737+13 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 ---------------------------------------------------------------------------------------- --- Sun 5 Mar 2017 Day 64 --- Next scan frequencies: 312.25 312.25 320.25 320.25 328.25 328.25 336.25 336.25 Next BBC frequencies: 539.65 539.65 547.65 547.65 555.65 555.65 563.65 563.65 Next scan bandwidths: 8.00 8.00 8.00 8.00 8.00 8.00 8.00 8.00 10 09 00 PHASING-SRC 13 51 56 28.0 95.7 -4.2 -57.1 0 0 Stopped 10 10 00 --- 13 52 56 28.2 95.8 -4.2 -57.1 60 0 10 10 00 PHASING-SRC 13 52 56 28.2 95.8 -4.2 -57.1 -6 0 10 10 06 10 11 00 --- 13 53 56 28.4 96.0 -4.2 -57.1 54 2 10 10 01 10 11 27 TARGET 13 54 23 34.9 97.8 -3.8 -57.4 2 2 10 11 27 10 21 27 --- 14 04 25 36.9 99.4 -3.6 -57.1 600 21 10 11 28 10 22 07 PHASE-REF 14 05 05 39.0 102.6 -3.4 -55.8 28 21 10 22 07 10 23 37 --- 14 06 35 39.3 102.8 -3.4 -55.7 90 24 10 22 08 10 24 31 BP-CAL 14 07 29 33.2 101.6 -3.7 -55.4 29 24 10 24 31 10 29 31 --- 14 12 30 34.2 102.5 -3.7 -55.1 300 34 10 24 32 10 30 12 TARGET 14 13 11 38.7 100.9 -3.5 -56.7 22 34 10 30 12 10 40 12 --- 14 23 13 40.7 102.6 -3.3 -56.1 600 53 10 30 13 10 40 37 PHASING-SRC 14 23 38 34.5 100.7 -3.7 -56.0 0 53 10 40 37 10 41 37 --- 14 24 38 34.7 100.8 -3.7 -56.0 60 55 10 40 38 10 41 53 PHASE-REF 14 24 54 42.9 106.2 -3.1 -54.5 -15 55 10 42 08 10 43 23 --- 14 26 24 43.2 106.5 -3.0 -54.3 75 57 10 41 54 10 44 00 TARGET 14 27 01 41.5 103.3 -3.2 -55.9 25 57 10 44 00 10 54 00 --- 14 37 03 43.5 105.2 -3.1 -55.2 600 77 10 44 01 10 54 15 TARGET 14 37 18 43.6 105.3 -3.1 -55.2 9 77 10 54 15 11 04 15 --- 14 47 20 45.5 107.2 -2.9 -54.3 600 96 10 54 16 11 04 15 TARGET 14 47 20 45.5 107.2 -2.9 -54.3 -6 96 11 04 21 11 08 15 --- 14 51 20 46.3 108.1 -2.8 -54.0 234 103 11 04 16 11 08 40 PHASING-SRC 14 51 46 40.2 105.6 -3.2 -54.4 0 103 11 08 40 11 09 40 --- 14 52 46 40.4 105.8 -3.2 -54.3 60 105 11 08 41 11 09 56 PHASE-REF 14 53 02 48.4 112.1 -2.6 -51.7 -14 105 11 10 10 11 11 26 --- 14 54 32 48.7 112.5 -2.6 -51.5 76 108 11 09 57 11 11 58 TARGET 14 55 04 47.1 108.8 -2.8 -53.6 20 108 11 11 58 11 21 58 --- 15 05 06 49.0 111.0 -2.6 -52.6 600 127 11 11 59 Schedule for VLA27 (Code Y ) Page 3 Probing pulsar emission with picoarcsecond precision - B1737+13 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 ---------------------------------------------------------------------------------------- --- Sun 5 Mar 2017 Day 64 --- 11 22 13 TARGET 15 05 21 49.1 111.1 -2.6 -52.5 9 127 11 22 13 11 32 13 --- 15 15 22 51.0 113.4 -2.4 -51.3 600 146 11 22 14 11 32 13 TARGET 15 15 22 51.0 113.4 -2.4 -51.3 -6 146 11 32 19 11 36 13 --- 15 19 23 51.8 114.4 -2.4 -50.8 234 154 11 32 14 11 36 37 PHASING-SRC 15 19 47 45.7 111.3 -2.8 -51.8 0 154 11 36 37 11 37 37 --- 15 20 47 45.9 111.5 -2.8 -51.7 60 156 11 36 38 11 37 54 PHASE-REF 15 21 04 53.7 119.2 -2.1 -47.7 -13 156 11 38 07 11 39 24 --- 15 22 35 53.9 119.6 -2.1 -47.5 77 158 11 37 55 11 40 15 BP-CAL 15 23 26 48.1 116.8 -2.5 -48.6 27 158 11 40 15 11 44 15 --- 15 27 26 48.8 117.8 -2.4 -48.0 240 166 11 40 16 11 44 55 TARGET 15 28 06 53.4 116.6 -2.2 -49.5 20 166 11 44 55 11 54 55 --- 15 38 08 55.2 119.4 -2.0 -47.8 600 185 11 44 56 11 55 10 TARGET 15 38 23 55.3 119.5 -2.0 -47.8 9 185 11 55 10 12 05 10 --- 15 48 25 57.0 122.5 -1.9 -45.9 600 205 11 55 11 12 05 34 PHASING-SRC 15 48 49 51.2 118.2 -2.3 -48.1 0 205 12 05 34 12 06 34 --- 15 49 49 51.4 118.4 -2.3 -47.9 60 207 12 05 35 12 07 02 PHASE-REF 15 50 17 58.7 128.3 -1.6 -41.7 0 207 12 07 02 12 08 32 --- 15 51 47 58.9 128.8 -1.6 -41.3 90 210 12 07 03 12 09 02 TARGET 15 52 17 57.7 123.7 -1.8 -45.0 16 210 12 09 02 12 19 02 --- 16 02 19 59.4 127.1 -1.6 -42.7 600 229 12 09 03 12 19 17 TARGET 16 02 34 59.4 127.2 -1.6 -42.7 9 229 12 19 17 12 29 17 --- 16 12 36 61.1 130.9 -1.5 -40.0 600 248 12 19 18 12 29 17 TARGET 16 12 36 61.1 130.9 -1.5 -40.0 -6 248 12 29 23 12 30 02 --- 16 13 21 61.2 131.2 -1.5 -39.8 39 250 12 29 18 SETUP FILE INFORMATION: NOTE: If DOPPLER, FREQ, or BW were used, see the individual scans for the final BBC settings. ======== Setup file: sess117.P256glob --- 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: 2 Station: VLA27 Total bit rate: 256 Format: VDIF Bits per sample: 2 Sample rate: 16.000 Number of channels: 8 DBE type: WIDAR Speedup factor: 1.00 Disk used to record data. 1st LO= -227.40 -227.40 -227.40 -227.40 -227.40 -227.40 -227.40 -227.40 Net SB= U U U U U U U U IF SB = U U U U U U U U Pol. = RCP LCP RCP LCP RCP LCP RCP LCP BBC = 1 2 3 4 5 6 7 8 BBC SB= U U U U U U U U IF = A C B D A C B D The following frequency sets based on these setups were used. Frequency Set: 6 Setup file default. Used with PCAL = off LO sum= 312.25 312.25 320.25 320.25 328.25 328.25 336.25 336.25 BBC fr= 539.65 539.65 547.65 547.65 555.65 555.65 563.65 563.65 Bandwd= 8.00 8.00 8.00 8.00 8.00 8.00 8.00 8.00 Matching frequency sets: 6 Track assignments are: track1= 1, 2, 3, 4, 5, 6, 7, 8 barrel=roll_off POSITIONS OF SOURCES USED IN RECORDING SCANS Source Source position (RA/Dec) Error (B1950) (J2000) (Date) (mas) * PHASING-SRC 18 02 45.670032 * 18 05 06.445800 18 05 53.961180 0.00 11 01 14.39955 * 11 01 31.64200 11 01 36.43531 0.00 From catalog imbedded in main SCHED input file. * TARGET 17 37 49.176273 * 17 40 07.345500 17 40 54.099214 0.00 13 13 28.46258 * 13 11 56.69000 13 11 23.54824 0.00 From catalog imbedded in main SCHED input file. * PHASE-REF 17 25 47.656525 * 17 28 07.051210 17 28 54.287586 0.00 12 18 03.42230 * 12 15 39.48535 12 14 48.77136 0.00 From catalog imbedded in main SCHED input file. * BP-CAL 17 49 10.387929 * 17 51 32.818572 17 52 20.969726 0.00 09 39 42.82574 * 09 39 00.72829 09 38 45.67751 0.00 From catalog imbedded in main SCHED input file. 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 PHASING-SRCsess117.P256glob 6 0.083 0.000 TARGET sess117.P256glob 1 2 3 4 5 6 2.029 25.365 PHASE-REF sess117.P256glob 1 2 3 4 5 6 0.150 1.729 BP-CAL sess117.P256glob 1 2 3 4 5 6 0.150 2.065 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) PHASING-SRC 76.3 TARGET 82.7 PHASE-REF 85.5 BP-CAL 79.4 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