COVER INFORMATION Station: GBT_VLBA (Code Gb ) Experiment: RadioAstron Pulsar observations Exp. Code: gs033a Schedule Version: 1.00 Processed by SCHED version: 11.10 Version 11.1 Beta of about April 26, 201 PI: Carl Gwinn Address: Physics Department, Broida Hall UC Santa Barbara Santa Barbara CA 93106, USA Phone: +1-805-893-2814 EMAIL: cgwinn@physics.ucsb.edu Fax: +1-805-893-8597 Phone during observation: +7-903-661-4865 Observing mode: P-band, dual-pol Notes: P-band, Radioastron-compatible frequency setup P-CAL is OFF Tsys is OFF auto-level (AGC) is OFF Schedule for GBT_VLBA (Code Gb ) Page 2 RadioAstron Pulsar observations 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 3 Nov 2013 Day 307 --- ---------- Calibration scan with auto-level (AGC) ON to set gain ---------- Next scan frequencies: 316.00 316.00 Next BBC frequencies: 776.00 776.00 Next scan bandwidths: 16.00 16.00 01 23 30 CRAB 22 54 02 5.9 66.5 -6.7 -50.8 0 0 Stopped 01 24 30 --- 22 55 02 6.1 66.6 -6.7 -50.9 60 0 01 25 00 CRAB 22 55 32 6.2 66.7 -6.7 -50.9 9 0 01 25 00 01 44 30 --- 23 15 05 9.7 69.5 -6.3 -52.3 1170 19 01 25 01 01 45 00 CRAB 23 15 35 9.8 69.6 -6.3 -52.4 9 19 01 45 00 02 04 30 --- 23 35 09 13.4 72.4 -6.0 -53.6 1170 38 01 45 01 02 05 00 CRAB 23 35 39 13.5 72.5 -6.0 -53.7 9 38 02 05 00 02 24 30 --- 23 55 12 17.2 75.2 -5.7 -54.8 1170 57 02 05 01 02 25 00 CRAB 23 55 42 17.3 75.3 -5.7 -54.8 9 57 02 25 00 02 44 30 --- 00 15 15 21.0 78.0 -5.3 -55.7 1170 75 02 25 01 02 45 00 CRAB 00 15 45 21.1 78.1 -5.3 -55.8 9 75 02 45 00 03 05 00 --- 00 35 48 25.0 80.9 -5.0 -56.5 1200 95 02 45 01 ---------- Ground-only segment 2. Please make sure Pcal, noise diode (Tsys) and auto-level (AGC) are OFF ---------- 03 05 30 CRAB 00 36 19 25.1 81.0 -5.0 -56.6 9 95 03 05 30 03 25 00 --- 00 55 52 28.9 83.7 -4.7 -57.1 1170 114 03 05 31 03 25 30 CRAB 00 56 22 29.0 83.8 -4.7 -57.1 9 114 03 25 30 03 45 00 --- 01 15 55 32.8 86.7 -4.3 -57.5 1170 133 03 25 31 03 45 30 CRAB 01 16 25 32.9 86.7 -4.3 -57.5 9 133 03 45 30 04 05 00 --- 01 35 58 36.7 89.7 -4.0 -57.7 1170 151 03 45 31 04 05 30 CRAB 01 36 28 36.8 89.8 -4.0 -57.7 9 151 04 05 30 04 25 00 --- 01 56 02 40.6 92.9 -3.7 -57.6 1170 170 04 05 31 04 25 30 CRAB 01 56 32 40.7 93.0 -3.6 -57.5 9 170 04 25 30 04 39 30 --- 02 10 34 43.5 95.3 -3.4 -57.3 840 184 04 25 31 ---------- Space segment 3. Please make sure Pcal, noise diode (Tsys) and auto-level (AGC) are OFF ---------- 04 40 00 CRAB 02 11 04 43.6 95.4 -3.4 -57.3 9 184 04 40 00 04 59 30 --- 02 30 37 47.4 98.9 -3.1 -56.6 1170 203 04 40 01 Schedule for GBT_VLBA (Code Gb ) Page 3 RadioAstron Pulsar observations 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 3 Nov 2013 Day 307 --- 05 00 00 CRAB 02 31 07 47.5 99.0 -3.1 -56.6 9 203 05 00 00 05 19 30 --- 02 50 41 51.2 102.9 -2.7 -55.4 1170 222 05 00 01 05 20 00 CRAB 02 51 11 51.3 103.0 -2.7 -55.4 9 222 05 20 00 05 39 30 --- 03 10 44 55.0 107.4 -2.4 -53.7 1170 240 05 20 01 05 40 00 CRAB 03 11 14 55.1 107.5 -2.4 -53.7 9 240 05 40 00 05 59 30 --- 03 30 47 58.7 112.6 -2.1 -51.3 1170 259 05 40 01 06 00 00 CRAB 03 31 17 58.8 112.7 -2.1 -51.2 9 259 06 00 00 06 19 30 --- 03 50 50 62.3 118.7 -1.7 -47.8 1170 278 06 00 01 06 20 00 CRAB 03 51 21 62.3 118.9 -1.7 -47.7 9 278 06 20 00 06 39 30 --- 04 10 54 65.6 126.1 -1.4 -43.0 1170 297 06 20 01 06 40 00 CRAB 04 11 24 65.6 126.3 -1.4 -42.9 9 297 06 40 00 06 59 30 --- 04 30 57 68.5 135.3 -1.1 -36.5 1170 316 06 40 01 07 00 00 CRAB 04 31 27 68.6 135.5 -1.1 -36.3 8 316 07 00 00 07 19 30 --- 04 51 00 71.0 146.7 -0.7 -27.6 1170 335 07 00 01 07 20 00 CRAB 04 51 30 71.1 147.0 -0.7 -27.4 8 335 07 20 00 07 39 30 --- 05 11 04 72.8 160.6 -0.4 -16.3 1170 354 07 20 01 07 40 00 CRAB 05 11 34 72.8 161.0 -0.4 -16.0 8 354 07 40 00 07 59 30 --- 05 31 07 73.6 176.5 -0.1 -3.0 1170 373 07 40 01 08 00 00 CRAB 05 31 37 73.6 176.9 -0.1 -2.6 7 373 08 00 00 08 19 30 --- 05 51 10 73.2 192.8 0.3 10.8 1170 391 08 00 01 08 20 00 CRAB 05 51 40 73.2 193.2 0.3 11.1 8 391 08 20 00 08 40 00 --- 06 11 44 71.8 208.0 0.6 23.4 1200 411 08 20 01 ---------- Ground-only segment 3. Please make sure Pcal, noise diode (Tsys) and auto-level (AGC) are OFF ---------- 08 40 30 CRAB 06 12 14 71.8 208.3 0.6 23.6 8 411 08 40 30 09 00 00 --- 06 31 47 69.6 220.4 0.9 33.2 1170 430 08 40 31 SETUP FILE INFORMATION: NOTE: If DOPPLER, FREQ, or BW were used, see the individual scans for the final BBC settings. ======== Setup file: ra92cm-16-2autolevel.set Matching groups in ./gs033a.freq.dat: gbt90cm LO1=1.422, LO2=10.83, LO3=10.5 Setup group: 3 Station: GBT_VLBA Total bit rate: 128 Format: VLBA1:4 Bits per sample: 2 Sample rate: 32.000 Number of channels: 2 DBE type: Disk used to record data. Setup not used for recording data. 1st LO= 1092.00 1092.00 Net SB= U U IF SB = L L Pol. = RCP LCP BBC = 1 2 BBC SB= L L IF = A C The following frequency sets based on these setups were used. Frequency Set: 10 Setup file default. Used pcal sets: 1 LO sum= 316.00 316.00 BBC fr= 776.00 776.00 Bandwd= 16.00 16.00 Matching frequency sets: 10 The following pulse cal sets were used with this setup: Pulse cal detection set: 1 PCAL = OFF PCALXB1= S1 S2 OFF OFF OFF OFF OFF OFF PCALXB2= M1 M2 OFF OFF OFF OFF OFF OFF PCALFR1= 0 0 0 0 0 0 0 0 PCALFR2= 0 0 0 0 0 0 0 0 ======== Setup file: ra92cm-16-2.set Matching groups in ./gs033a.freq.dat: gbt90cm LO1=1.422, LO2=10.83, LO3=10.5 Setup group: 9 Station: GBT_VLBA Total bit rate: 128 Format: VLBA1:4 Bits per sample: 2 Sample rate: 32.000 Number of channels: 2 DBE type: Speedup factor: 1.00 Disk used to record data. 1st LO= 1092.00 1092.00 Net SB= U U IF SB = L L Pol. = RCP LCP BBC = 1 2 BBC SB= L L IF = A C The following frequency sets based on these setups were used. Frequency Set: 11 Setup file default. Used pcal sets: 1 LO sum= 316.00 316.00 BBC fr= 776.00 776.00 Bandwd= 16.00 16.00 Matching frequency sets: 11 The following pulse cal sets were used with this setup: Pulse cal detection set: 1 PCAL = OFF PCALXB1= S1 S2 OFF OFF OFF OFF OFF OFF PCALXB2= M1 M2 OFF OFF OFF OFF OFF OFF PCALFR1= 0 0 0 0 0 0 0 0 PCALFR2= 0 0 0 0 0 0 0 0 Track assignments are: track1= 2, 18 barrel=roll_off POSITIONS OF SOURCES USED IN RECORDING SCANS Source Source position (RA/Dec) Error (B1950) (J2000) (Date) (mas) * CRAB 05 31 31.427725 * 05 34 31.973000 05 35 23.701658 0.00 21 58 54.40670 * 22 00 52.06000 22 01 16.46820 0.00 From catalog imbedded in main SCHED input file. Pulsar * FAKERA 11 57 21.769299 * 12 00 00.000000 12 00 26.604862 0.00 85 16 41.77889 * 85 00 00.00000 84 55 06.13203 0.00 From catalog imbedded in main SCHED input file. fake circumpolar target for a TS to look at 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 CRAB ra92cm-16-2.set 5 6 7 8 11 13 13.091 108.393 FAKERA ra92cm-16-2.set 5 9.450 0.000 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) CRAB 136.5 FAKERA 101.1 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