COVER INFORMATION Station: VLBA_HN (Code Hn ) Experiment: Exploratory Imaging of Q0906+6930 Exp. Code: BR093A Schedule Version: 1.00 Processed by SCHED version: Release of 18 Sept. 2003 PI: Roger W. Romani Address: Stanford University Department of Physics Stanford, CA 94305-4060 USA Phone: (650) 725-7595 EMAIL: rwr@astro.stanford.edu Fax: (650) 725-9389 Phone during observation: (650) 725-7595 Observing mode: 128-4-2 2 cm Notes: Suitable for dynamic scheduling. Pulse-cal at all stations. 90 minute track approved. 1h25m scheduled to permit 5m setup. Schedule for VLBA_HN (Code Hn ) Page 2 Exploratory Imaging of Q0906+6930 UP: D => Below limits; H => Below horizon mask. blank => Up. Early: Seconds between end of slew and start. Dwell: On source seconds. Tapes: Drive, Index, Start footage / Direction, Head Group, End footage. TPStart: Tape motion start time. Frequencies are LO sum (band edge). Automatic tape allocation specified. Tape positions are just estimates. ---------------------------------------------------------------------------------------- Start UT Source Start / Stop Early Tapes TPStart Stop UT LST EL AZ HA UP ParA Dwell (see above) ---------------------------------------------------------------------------------------- --- Fri 27 Feb 2004 Day 58 --- Next scan frequencies: 15357.49 15357.49 15365.49 15365.49 Next BBC frequencies: 757.49 757.49 765.49 765.49 Next scan bandwidths: 8.00 8.00 8.00 8.00 05 01 56 0716+714 10 39 32 53.0 -23.7 3.3 112.9 0 1 1 0 05 01 56 05 05 55 --- 10 43 32 52.7 -23.9 3.4 111.8 239 F 1 1596 05 06 55 Q0906+6930 10 44 32 60.6 -17.2 1.6 141.9 38 1 1 1596 05 06 55 05 41 19 --- 11 19 02 58.5 -21.5 2.2 130.1 2064 F 1 15358 05 42 19 0716+714 11 20 02 49.9 -25.3 4.0 102.1 36 1 1 15358 05 42 19 05 46 18 --- 11 24 02 49.6 -25.4 4.0 101.1 239 F 1 16954 05 47 18 Q0906+6930 11 25 02 58.1 -22.1 2.3 128.2 37 1 2 16954 05 47 18 06 21 43 --- 11 59 32 55.6 -25.1 2.9 117.6 2064 R 1 4484 06 22 42 0716+714 12 00 32 46.7 -25.9 4.6 92.1 36 1 2 4484 06 22 42 06 26 42 --- 12 04 32 46.3 -25.9 4.7 91.1 239 R 1 2888 SETUP FILE INFORMATION: NOTE: If DOPPLER, FREQ, or BW were used, see the individual scans for the final BBC settings. Setup file: /home/filehost/cwalker/sched/setups/v2cm-128-4-2.set Matches group v2cm_d3 in /home/filehost/cwalker/sched/catalogs/freq.dat Fourth 2cm filter Setup group: 1 Station: VLBA Total bit rate: 128 Format: VLBA1:4 Bits per sample: 2 Sample rate: 16.000 Number of channels: 4 Passes/head pos: 1 Speedup factor: 2.00 Tape speeds: Low density - 133.330 ips, High density - 80.00 ips Time per pass for 17600 ft, High density tapes is: 00:44:00 1st LO= 14600.00 14600.00 14600.00 14600.00 Net SB= U U U U Pol. = RCP LCP RCP LCP BBC = 1 2 3 4 BBC SB= U U U U IF = B D B D VLBA FE= omit 2cm omit 2cm VLBA Synth= 14.6 10.9 10.9 The following frequency sets based on this setup were used. Frequency Set: 1 Setup file default. Used pcal sets: 1 LO sum= 15357.49 15357.49 15365.49 15365.49 BBC fr= 757.49 757.49 765.49 765.49 Bandwd= 8.000 8.000 8.000 8.000 The following pulse cal sets were used with this setup: Pulse cal detection set: 1 PCAL = 1MHZ PCALXB1= S1 S3 S1 S3 S1 S2 S3 S4 PCALXB2= S2 S4 S2 S4 M1 M2 M3 M4 PCALFR1= 510 510 6510 6510 0 0 0 0 PCALFR2= 510 510 6510 6510 0 0 0 0 Track assignments are: track1= 2, 18, 3, 19 barrel=roll_auto SOURCE LIST -- Exploratory Imaging of Q0906+6930 Catalog positions marked with *. Precession of date coordinates is based on stop time of first scan. Names used in schedule marked with *. Short names used in VLA and SNAP files marked with +. Observation date used in B1950/J2000 coordinate conversion (PRECDATE): 1979.900 No adjustments are made for rates (DRA, DDEC). Source Source position (RA/Dec) (B1950) (J2000) (Date) * Q0906+6930 09 01 52.296508 * 09 06 30.749400 09 06 56.873363 69 42 32.11551 * 69 30 30.84400 69 29 41.30878 From catalog imbedded in main SCHED input file. J0721+7120 07 16 13.029725 * 07 21 53.448460 07 22 23.462291 * 0716+714 71 26 15.17405 * 71 20 36.36339 71 20 25.60102 J0721+71 /home/filehost/cwalker/sched/catalogs/sources.vlba ICRF - Ext.1 Source - 1998 IERS Annual Report 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) Q0906+6930 117.3 0716+714 110.4 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