COVER INFORMATION Station: VLBA_BR (Code Br ) Experiment: The spatial distribution of SiO masers in AGB at 43 and 86GHz. Exp. Code: BM178B Schedule Version: 4.20 Processed by SCHED version: Release of 02 July 2002 PI: Kevin B. Marvel Address: American Astronomical Society 2000 Florida Ave, NW,Suite 400 Washington, DC 20009-1231, USA Phone: 202-328-2010 EMAIL: marvel@aas.org, colomer@oan.es, desmurs@oan.es Fax: 202-234-2560 Phone during observation: Observing mode: VLBA Dual 3mm and 7mm observations Notes: Please use all available antennas LINE EXPERIMENT: Please DO NOT use phase cal signal Start time is optimal PT LST START for this source. Thank you. Schedule for VLBA_BR (Code Br ) Page 2 The spatial distribution of SiO masers in AGB at 43 and 86GHz. 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) ---------------------------------------------------------------------------------------- --- Sat 7 Dec 2002 Day 341 --- Next scan frequencies: 42811.50 42870.83 43112.96 43112.96 Next BBC frequencies: 611.50 670.83 912.96 912.96 Next scan bandwidths: 8.00 8.00 8.00 8.00 00 10 04 3C454.3 21 13 45 52.0 138.6 -1.7 -27.4 0 1 1 0 00 10 04 00 16 03 --- 21 19 45 52.6 140.7 -1.6 -26.1 359 F 1 4787 00 17 19 IRC10011 21 21 01 31.5 107.5 -3.8 -40.7 28 1 1 4787 00 17 19 00 33 17 --- 21 37 01 34.1 111.1 -3.5 -39.7 957 F 1 17552 00 33 23 IRC10011 21 37 07 34.1 111.1 -3.5 -39.7 0 1 2 17552 00 33 17 00 49 20 --- 21 53 07 36.5 114.8 -3.2 -38.4 957 R 1 4705 00 50 30 3C454.3 21 54 18 55.8 153.9 -1.0 -17.8 26 1 1 4705 00 50 30 00 56 29 --- 22 00 18 56.2 156.3 -0.9 -16.2 359 F 2 82 05 09 54 3C454.3 02 14 24 38.2 249.6 3.3 40.7 15136 1 1 82 05 09 54 05 15 53 --- 02 20 24 37.3 251.0 3.4 41.1 359 F 2 4869 05 17 37 IRC10011 02 22 08 51.2 210.2 1.3 20.2 71 1 2 4869 05 17 37 05 33 35 --- 02 38 08 49.7 215.9 1.5 23.7 957 R 2 17566 05 33 41 IRC10011 02 38 15 49.7 216.0 1.5 23.7 0 1 3 17566 05 33 35 05 55 37 --- 03 00 15 47.3 223.3 1.9 28.0 1316 F 1 66 05 57 11 3C454.3 03 01 48 30.6 259.9 4.1 43.2 54 1 3 66 05 57 11 06 08 09 --- 03 12 48 28.8 262.1 4.3 43.5 658 F 1 8842 SETUP FILE INFORMATION: NOTE: If DOPPLER, FREQ, or BW were used, see the individual scans for the final BBC settings. Setup file: bm178_7mm.set Matches group v7mm_b8 in /home/filehost/cwalker/sched/catalogs/freq.dat Setup group: 1 Station: VLBA Total bit rate: 128 Format: VLBA1:2 Bits per sample: 2 Sample rate: 16.000 Number of channels: 4 Passes/head pos: 2 Speedup factor: 1.00 Tape speeds: Low density - 266.660 ips, High density - 160.00 ips Time per pass for 17600 ft, High density tapes is: 00:22:00 1st LO= 42200.00 42200.00 42200.00 42200.00 Net SB= U U U U Pol. = LCP LCP LCP RCP BBC = 1 2 3 4 BBC SB= U U U U IF = C C C A VLBA FE= 7mm omit 7mm omit VLBA Synth= 15.4 7.4 11.6 The following frequency sets based on this setup were used. Frequency Set: 1 Based on FREQ, BW, and/or DOPPLER in schedule. Used pcal sets: 1 LO sum= 42811.50 42870.83 43112.96 43112.96 BBC fr= 611.50 670.83 912.96 912.96 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 = OFF PCALXB1= S1 S2 S3 S4 OFF OFF OFF OFF PCALXB2= M1 M2 M3 M4 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, 10, 18, 26 track2= 3, 11, 19, 27 barrel=roll_auto SOURCE LIST -- The spatial distribution of SiO masers in AGB at 43 and 86GHz. 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) * IRC10011 01 03 48.090737 * 01 06 25.993800 01 06 34.900028 12 19 51.37931 * 12 35 53.28700 12 36 50.12389 From catalog imbedded in main SCHED input file. * 3C454.3 22 51 29.520100 * 22 53 57.748300 22 54 05.349623 15 52 54.35016 * 16 08 53.56300 16 09 50.62213 From catalog imbedded in main SCHED input file. * P-IRC10011 01 03 48.090737 * 01 06 25.993800 01 06 34.900028 12 19 51.37931 * 12 35 53.28700 12 36 50.12389 From catalog imbedded in main SCHED input file. * P-3C454.3 22 51 29.520100 * 22 53 57.748300 22 54 05.349623 15 52 54.35016 * 16 08 53.56300 16 09 50.62213 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) IRC10011 125.2 3C454.3 96.1 P-IRC10011 125.2 P-3C454.3 96.1 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