COVER INFORMATION Station: VLBA_OV (Code Ov ) Experiment: BL110 - VLBA fmt 22 cm Exp. Code: BL110e Schedule Version: 1.00 Processed by SCHED version: Release of 02 July 2002 PI: T. J. W. Lazio Address: NRL Code 7213 Washington, DC 20375-5351 USA Phone: 1-202-404-6329 EMAIL: lazio@rsd.nrl.navy.mil Fax: 1-202-404-8894 Phone during observation: 1-202-404-6329 Observing mode: continuum Notes: Fringe finder: B2251+1552; observing 4 target sources local contact: Anish Roshi aroshi@nrao.edu Phone: 1-304-456-2130 Schedule for VLBA_OV (Code Ov ) Page 2 BL110 - VLBA fmt 22 cm 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 9 Aug 2002 Day 221 --- Next scan frequencies: 1371.50 1371.50 1379.50 1379.50 Next BBC frequencies: 728.50 728.50 720.50 720.50 Next scan bandwidths: 8.00 8.00 8.00 8.00 06 32 08 B2156+6214 19 49 22 58.0 27.6 -2.1 -127.0 0 1 1 0 06 32 08 06 47 05 --- 20 04 22 59.4 25.5 -1.9 -132.2 898 F 1 5984 06 47 18 B2203+5901 20 04 35 60.6 31.7 -2.0 -125.1 2 1 1 5984 06 47 05 07 02 15 --- 20 19 35 62.1 29.2 -1.8 -130.4 898 F 1 12050 07 04 05 B2251+1552 20 21 25 50.3 111.6 -2.5 -50.4 49 1 1 12050 07 04 05 07 08 04 --- 20 25 25 51.1 112.6 -2.5 -49.9 239 F 1 13646 07 09 57 B2204+6015 20 27 18 61.9 26.0 -1.7 -134.8 49 1 2 13646 07 09 57 07 24 55 --- 20 42 18 63.2 23.0 -1.4 -140.7 898 R 1 15571 07 25 03 B2206+5931 20 42 26 63.6 24.6 -1.4 -138.9 1 1 2 15571 07 24 55 07 40 00 --- 20 57 26 64.7 21.2 -1.2 -145.2 898 R 1 9536 SETUP FILE INFORMATION: NOTE: If DOPPLER, FREQ, or BW were used, see the individual scans for the final BBC settings. Setup file: BL110.set Matches group v20cm_1 in /home/filehost/cwalker/sched/catalogs/freq.dat FD and KP filtered below 1330. SC filtered above 1440 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= 2100.00 2100.00 2100.00 2100.00 Net SB= U U U U Pol. = RCP LCP RCP LCP BBC = 1 2 3 4 BBC SB= L L L L IF = A C A C VLBA FE= 20cm omit 20cm omit VLBA Synth= 15.4 2.1 15.4 The following frequency sets based on this setup were used. Frequency Set: 1 Setup file default. Used pcal sets: 1 LO sum= 1371.50 1371.50 1379.50 1379.50 BBC fr= 728.50 728.50 720.50 720.50 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= 500 500 6500 6500 0 0 0 0 PCALFR2= 500 500 6500 6500 0 0 0 0 Track assignments are: track1= 2, 18, 3, 19 barrel=roll_auto SOURCE LIST -- BL110 - VLBA fmt 22 cm 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) * B2156+6214 * 21 56 07.350000 21 57 35.844647 21 57 42.338807 * 62 14 35.40000 62 28 56.11687 62 29 32.89747 From catalog imbedded in main SCHED input file. * B2203+5901 * 22 03 56.930000 22 05 36.846967 22 05 43.617797 * 59 01 14.80000 59 15 52.72832 59 16 30.24877 From catalog imbedded in main SCHED input file. * B2204+6015 * 22 04 35.230000 22 06 12.666343 22 06 19.399411 * 60 15 55.70000 60 30 34.92268 60 31 12.29251 From catalog imbedded in main SCHED input file. * B2206+5931 * 22 06 57.540000 22 08 37.695928 22 08 44.497313 * 59 31 04.50000 59 45 48.69455 59 46 26.25260 From catalog imbedded in main SCHED input file. * B2251+1552 * 22 51 29.528100 22 53 57.756321 22 54 05.714697 * 15 52 54.24200 16 08 53.45499 16 09 40.06403 From catalog imbedded in main SCHED input file. 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) B2156+6214 101.2 B2203+5901 104.2 B2204+6015 102.9 B2206+5931 103.6 B2251+1552 139.9 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