COVER INFORMATION Station: GBT_VLBA (Code Gb ) Experiment: Probing pulsar emission with picoarcsecond precision - B1133+16 Exp. Code: GK049C 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: J1125+2610 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 - B1133+16 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 ---------------------------------------------------------------------------------------- --- Sat 4 Mar 2017 Day 63 --- 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 04 00 00 PHASE-REF 09 29 05 54.5 114.6 -2.3 -48.7 0 0 04 00 00 04 01 30 --- 09 30 36 54.8 115.0 -2.2 -48.5 90 3 04 00 01 04 02 10 TARGET 09 31 16 54.3 120.7 -2.1 -44.4 -1 3 04 02 11 04 11 10 --- 09 40 17 55.8 123.4 -1.9 -42.8 539 20 04 02 11 04 11 20 TARGET 09 40 27 55.8 123.5 -1.9 -42.7 -11 20 04 11 31 04 21 20 --- 09 50 29 57.4 126.8 -1.8 -40.7 589 39 04 11 21 04 22 06 PHASE-REF 09 51 15 58.4 121.1 -1.9 -45.0 4 39 04 22 06 04 23 36 --- 09 52 45 58.6 121.6 -1.9 -44.7 90 42 04 22 07 04 24 44 BP-CAL 09 53 53 66.9 115.5 -1.5 -51.9 15 42 04 24 44 04 29 44 --- 09 58 54 67.8 117.3 -1.5 -50.8 300 52 04 24 45 04 30 39 TARGET 09 59 49 58.9 130.0 -1.6 -38.5 -1 52 04 30 40 04 40 39 --- 10 09 51 60.3 133.8 -1.5 -35.9 599 71 04 30 40 04 40 39 TARGET 10 09 51 60.3 133.8 -1.5 -35.9 -20 71 04 40 59 04 41 39 --- 10 10 51 60.5 134.2 -1.4 -35.7 40 72 04 40 40 04 42 25 PHASE-REF 10 11 37 61.6 128.2 -1.5 -40.5 4 72 04 42 25 04 43 55 --- 10 13 08 61.9 128.8 -1.5 -40.1 90 75 04 42 26 04 44 32 TARGET 10 13 45 60.9 135.4 -1.4 -34.9 -6 75 04 44 38 04 54 32 --- 10 23 46 62.2 139.6 -1.2 -31.8 594 94 04 44 33 04 54 47 TARGET 10 24 01 62.2 139.7 -1.2 -31.7 -6 94 04 54 53 05 04 47 --- 10 34 03 63.4 144.3 -1.0 -28.3 594 114 04 54 48 05 04 47 TARGET 10 34 03 63.4 144.3 -1.0 -28.3 -20 114 05 05 07 05 07 47 --- 10 37 04 63.8 145.8 -1.0 -27.3 160 119 05 04 48 05 07 47 TARGET 10 37 04 63.8 145.8 -1.0 -27.3 -20 119 05 08 07 05 08 47 --- 10 38 04 63.9 146.2 -1.0 -26.9 40 120 05 07 48 05 08 47 TARGET 10 38 04 63.9 146.2 -1.0 -26.9 -20 120 05 09 07 05 09 47 --- 10 39 04 64.0 146.7 -1.0 -26.5 40 121 05 08 48 05 10 33 PHASE-REF 10 39 50 65.6 140.4 -1.1 -31.8 3 121 05 10 33 05 12 03 --- 10 41 20 65.8 141.1 -1.0 -31.2 90 124 05 10 34 Schedule for GBT_VLBA (Code Gb ) Page 3 Probing pulsar emission with picoarcsecond precision - B1133+16 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 ---------------------------------------------------------------------------------------- --- Sat 4 Mar 2017 Day 63 --- 05 12 47 TARGET 10 42 04 64.3 148.2 -0.9 -25.4 0 124 05 12 47 05 22 47 --- 10 52 06 65.3 153.4 -0.7 -21.4 600 143 05 12 48 05 23 02 TARGET 10 52 21 65.3 153.6 -0.7 -21.3 -7 143 05 23 09 05 33 02 --- 11 02 23 66.1 159.1 -0.6 -16.9 593 163 05 23 03 05 33 02 TARGET 11 02 23 66.1 159.1 -0.6 -16.9 -20 163 05 33 22 05 37 02 --- 11 06 23 66.3 161.4 -0.5 -15.0 220 170 05 33 03 05 37 02 TARGET 11 06 23 66.3 161.4 -0.5 -15.0 -20 170 05 37 22 05 38 02 --- 11 07 24 66.4 162.0 -0.5 -14.6 40 171 05 37 03 05 38 47 PHASE-REF 11 08 09 68.5 155.9 -0.6 -19.7 3 171 05 38 47 05 40 17 --- 11 09 39 68.7 156.9 -0.6 -18.9 90 174 05 38 48 05 41 00 TARGET 11 10 22 66.6 163.7 -0.4 -13.2 0 174 05 41 00 05 51 00 --- 11 20 24 67.0 169.7 -0.3 -8.3 600 193 05 41 01 05 51 15 TARGET 11 20 39 67.0 169.9 -0.3 -8.2 -7 193 05 51 22 06 01 15 --- 11 30 40 67.3 176.1 -0.1 -3.2 593 212 05 51 16 06 01 15 TARGET 11 30 40 67.3 176.1 -0.1 -3.2 -20 212 06 01 35 06 02 15 --- 11 31 40 67.3 176.7 -0.1 -2.7 40 214 06 01 16 06 03 00 PHASE-REF 11 32 26 69.9 171.8 -0.2 -6.8 5 214 06 03 00 06 04 30 --- 11 33 56 69.9 172.8 -0.2 -5.9 90 216 06 03 01 06 05 32 BP-CAL 11 34 58 77.5 188.5 0.1 7.4 5 216 06 05 32 06 10 32 --- 11 39 59 77.3 193.6 0.2 11.8 300 226 06 05 33 06 11 32 TARGET 11 40 59 67.3 182.5 0.1 2.0 1 226 06 11 32 06 21 32 --- 11 51 01 67.1 188.7 0.2 7.1 600 245 06 11 33 06 21 47 TARGET 11 51 16 67.1 188.9 0.2 7.2 -7 245 06 21 54 06 30 00 --- 11 59 30 66.8 193.9 0.4 11.3 486 261 06 21 48 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 11 40 49.199995 * 11 43 25.089300 11 44 19.206235 0.00 22 23 34.99964 * 22 06 56.06900 22 01 06.11077 0.00 From catalog imbedded in main SCHED input file. * TARGET 11 33 27.385477 * 11 36 03.248000 11 36 57.400059 0.00 16 07 40.41945 * 15 51 04.48000 15 45 15.60041 0.00 From catalog imbedded in main SCHED input file. * PHASE-REF 11 40 50.548663 * 11 43 26.069600 11 44 20.079975 0.00 18 51 17.31759 * 18 34 38.36200 18 28 48.51279 0.00 From catalog imbedded in main SCHED input file. * BP-CAL 11 23 14.869280 * 11 25 53.711900 11 26 48.836222 0.00 26 26 49.99090 * 26 10 19.97850 26 04 32.79778 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 1.987 25.637 PHASE-REF sess117.P256glob 1 2 3 4 5 6 0.150 2.053 BP-CAL sess117.P256glob 1 2 3 4 5 6 0.167 2.314 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 161.1 TARGET 167.0 PHASE-REF 163.8 BP-CAL 159.3 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