COVER INFORMATION Station: GBT_VLBA (Code Gb ) 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 GBT_VLBA (Code Gb ) 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: 723.75 723.75 715.75 715.75 707.75 707.75 699.75 699.75 Next scan bandwidths: 8.00 8.00 8.00 8.00 8.00 8.00 8.00 8.00 10 00 00 PHASE-REF 15 34 01 53.4 128.0 -1.9 -39.2 0 0 10 00 00 10 01 30 --- 15 35 31 53.7 128.5 -1.9 -38.9 90 3 10 00 01 10 02 10 TARGET 15 36 11 52.6 123.9 -2.1 -41.9 1 3 10 02 10 10 11 10 --- 15 45 13 54.0 126.7 -1.9 -40.2 540 20 10 02 11 10 11 27 TARGET 15 45 30 54.1 126.8 -1.9 -40.1 -4 20 10 11 31 10 21 27 --- 15 55 32 55.6 130.1 -1.8 -38.0 596 39 10 11 28 10 22 07 PHASE-REF 15 56 12 56.7 135.6 -1.5 -34.1 -1 39 10 22 08 10 23 37 --- 15 57 42 56.9 136.1 -1.5 -33.8 89 42 10 22 08 10 24 31 BP-CAL 15 58 36 51.6 131.0 -1.9 -36.9 10 42 10 24 31 10 29 31 --- 16 03 37 52.3 132.6 -1.8 -35.8 300 52 10 24 32 10 30 12 TARGET 16 04 18 56.9 133.2 -1.6 -35.9 0 52 10 30 12 10 40 12 --- 16 14 20 58.3 136.9 -1.4 -33.3 600 71 10 30 13 10 40 12 TARGET 16 14 20 58.3 136.9 -1.4 -33.3 -20 71 10 40 32 10 41 12 --- 16 15 20 58.4 137.3 -1.4 -33.1 40 73 10 40 13 10 41 53 PHASE-REF 16 16 01 59.2 143.4 -1.2 -28.6 -1 73 10 41 54 10 43 23 --- 16 17 31 59.4 144.0 -1.2 -28.1 89 75 10 41 54 10 44 00 TARGET 16 18 08 58.8 138.4 -1.4 -32.3 -4 75 10 44 04 10 54 00 --- 16 28 10 60.0 142.5 -1.2 -29.3 596 95 10 44 01 10 54 15 TARGET 16 28 25 60.1 142.6 -1.2 -29.2 -6 95 10 54 21 11 04 15 --- 16 38 27 61.2 147.0 -1.0 -26.0 594 114 10 54 16 11 04 15 TARGET 16 38 27 61.2 147.0 -1.0 -26.0 -20 114 11 04 35 11 08 15 --- 16 42 27 61.6 148.9 -1.0 -24.6 220 121 11 04 16 11 08 15 TARGET 16 42 27 61.6 148.9 -1.0 -24.6 -20 121 11 08 35 11 09 15 --- 16 43 27 61.7 149.4 -1.0 -24.2 40 122 11 08 16 11 09 56 PHASE-REF 16 44 09 62.0 156.2 -0.7 -18.9 -2 122 11 09 58 11 11 26 --- 16 45 39 62.1 156.9 -0.7 -18.3 88 125 11 09 57 11 11 58 TARGET 16 46 11 62.0 150.6 -0.9 -23.2 -11 125 11 12 09 11 21 58 --- 16 56 13 62.9 155.6 -0.7 -19.4 589 144 11 11 59 Schedule for GBT_VLBA (Code Gb ) 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 16 56 28 62.9 155.7 -0.7 -19.4 -6 144 11 22 19 11 32 13 --- 17 06 29 63.6 160.9 -0.6 -15.3 594 163 11 22 14 11 32 13 TARGET 17 06 29 63.6 160.9 -0.6 -15.3 -20 163 11 32 33 11 36 13 --- 17 10 30 63.9 163.0 -0.5 -13.6 220 170 11 32 14 11 36 13 TARGET 17 10 30 63.9 163.0 -0.5 -13.6 -20 170 11 36 33 11 37 13 --- 17 11 30 63.9 163.5 -0.5 -13.2 40 171 11 36 14 11 37 54 PHASE-REF 17 12 11 63.6 170.8 -0.3 -7.4 -3 171 11 37 57 11 39 24 --- 17 13 41 63.6 171.6 -0.3 -6.7 87 174 11 37 55 11 40 15 BP-CAL 17 14 33 60.0 161.1 -0.6 -14.9 1 174 11 40 15 11 44 15 --- 17 18 33 60.2 163.0 -0.6 -13.4 240 182 11 40 16 11 44 55 TARGET 17 19 13 64.3 167.8 -0.4 -9.8 0 182 11 44 55 11 54 55 --- 17 29 15 64.6 173.4 -0.2 -5.3 600 201 11 44 56 11 55 10 TARGET 17 29 30 64.6 173.5 -0.2 -5.2 -7 201 11 55 17 12 05 10 --- 17 39 32 64.8 179.2 -0.0 -0.6 593 220 11 55 11 12 05 10 TARGET 17 39 32 64.8 179.2 -0.0 -0.6 -20 220 12 05 30 12 06 10 --- 17 40 32 64.8 179.8 -0.0 -0.2 40 222 12 05 11 12 07 02 PHASE-REF 17 41 24 63.7 186.9 0.2 5.5 9 222 12 07 02 12 08 32 --- 17 42 54 63.6 187.7 0.2 6.2 90 225 12 07 03 12 09 02 TARGET 17 43 24 64.8 181.4 0.0 1.1 -13 225 12 09 15 12 19 02 --- 17 53 26 64.6 187.1 0.2 5.7 587 244 12 09 03 12 19 17 TARGET 17 53 41 64.6 187.3 0.2 5.8 -7 244 12 19 24 12 29 17 --- 18 03 43 64.3 192.9 0.4 10.3 593 263 12 19 18 12 29 17 TARGET 18 03 43 64.3 192.9 0.4 10.3 -20 263 12 29 37 12 30 02 --- 18 04 28 64.2 193.3 0.4 10.7 25 263 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 Matching groups in /home/guest/rmc/SCHED/sched11.4/catalogs/freq_RDBE.dat: gbt90cm LO1=1.348, LO2=10.812, LO3=10.5 Setup group: 1 Station: GBT_VLBA Total bit rate: 256 Format: VDIF Bits per sample: 2 Sample rate: 16.000 Number of channels: 8 DBE type: RDBE_DDC Speedup factor: 1.00 Disk used to record data. 1st LO= 1036.00 1036.00 1036.00 1036.00 1036.00 1036.00 1036.00 1036.00 Net SB= U U U U U U U U IF SB = L L L L L L L L Pol. = RCP LCP RCP LCP RCP LCP RCP LCP BBC = 1 2 3 4 5 6 7 8 BBC SB= L L L L L L L L IF = A C A C A C A C The following frequency sets based on these setups were used. Frequency Set: 2 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= 723.75 723.75 715.75 715.75 707.75 707.75 699.75 699.75 Bandwd= 8.00 8.00 8.00 8.00 8.00 8.00 8.00 8.00 VLBA legacy crd files using 4 channels based on RDBE channels: 3 4 5 6 CRD fr= 715.75 715.75 707.75 707.75 CRD bw= 8.00 8.00 8.00 8.00 Matching frequency sets: 2 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