COVER INFORMATION Station: VLBA_BR (Code Br ) Experiment: The spatial distribution of SiO masers in AGB at 43 and 86GHz. Exp. Code: BM178D 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: 42819.41 42878.75 43120.93 43120.93 Next BBC frequencies: 619.41 678.75 920.93 920.93 Next scan bandwidths: 8.00 8.00 8.00 8.00 10 08 26 OJ287 07 13 45 55.3 135.1 -1.7 -30.1 0 1 1 0 10 08 26 10 14 25 --- 07 19 45 56.0 137.3 -1.6 -28.8 359 F 1 4787 10 15 01 RLEO 07 20 21 42.1 127.6 -2.5 -32.7 2 1 1 4787 10 15 01 10 30 58 --- 07 36 21 44.2 132.2 -2.2 -30.3 957 F 1 17552 10 31 04 RLEO 07 36 27 44.2 132.2 -2.2 -30.3 0 1 2 17552 10 30 58 10 47 02 --- 07 52 27 46.1 137.0 -1.9 -27.6 957 R 1 4706 10 49 01 OJ287 07 54 27 59.4 151.2 -1.0 -20.0 87 1 1 4706 10 49 01 10 55 00 --- 08 00 27 59.9 153.8 -0.9 -18.3 359 F 2 81 15 13 43 OJ287 12 19 52 40.4 254.1 3.4 43.1 15450 1 1 81 15 13 43 15 19 42 --- 12 25 52 39.5 255.4 3.5 43.5 359 F 2 4868 15 20 34 RLEO 12 26 44 40.6 235.6 2.7 34.2 33 1 2 4868 15 20 34 15 36 31 --- 12 42 44 38.3 239.8 2.9 36.0 957 R 2 17567 15 36 37 RLEO 12 42 50 38.3 239.8 2.9 36.0 0 1 3 17567 15 36 31 15 58 34 --- 13 04 50 35.0 245.2 3.3 38.2 1316 F 1 65 15 59 04 OJ287 13 05 21 33.0 263.7 4.2 44.9 12 1 3 65 15 59 04 16 05 03 --- 13 11 21 32.0 264.8 4.3 45.1 359 F 1 4852 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= 42819.41 42878.75 43120.93 43120.93 BBC fr= 619.41 678.75 920.93 920.93 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) * RLEO 09 44 52.219889 * 09 47 33.490400 09 47 42.401798 11 39 39.74816 * 11 25 43.64600 11 24 59.58585 From catalog imbedded in main SCHED input file. * 3C273 12 26 33.245833 * 12 29 06.699729 12 29 14.222800 02 19 43.30569 * 02 03 08.59819 02 02 17.75238 From catalog imbedded in main SCHED input file. ICRF - Ext.1 Source - 1998 IERS Annual Report * OJ287 08 51 57.250612 * 08 54 48.874924 08 54 58.662867 20 17 58.41743 * 20 06 30.64088 20 05 52.55718 From catalog imbedded in main SCHED input file. ICRF - Ext.1 Source - 1998 IERS Annual Report * P-RLEO 09 44 52.219889 * 09 47 33.490400 09 47 42.401798 11 39 39.74816 * 11 25 43.64600 11 24 59.58585 From catalog imbedded in main SCHED input file. * P-3C273 12 26 33.245833 * 12 29 06.699729 12 29 14.222800 02 19 43.30569 * 02 03 08.59819 02 02 17.75238 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) RLEO 110.0 3C273 69.4 OJ287 124.7 P-RLEO 110.0 P-3C273 69.4 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