COVER INFORMATION Station: VLBA_MK (Code Mk ) Experiment: Distribution of SiO masers in AGB stars. Exp. Code: BC146b Schedule Version: 1.10 Processed by SCHED version: NRAO internal release of 4 October 2004 PI: Francisco Colomer Address: Observatorio Astronomico Nacional Apartado 112 E-28803 Alcala de Henares, SPAIN Phone: +34-918855060 EMAIL: f.colomer@oan.es, jf.desmurs@oan.es Fax: +34-918855062 Phone during observation: Observing mode: VLBA 7mm spectral line observations Notes: Please use all available antennas LINE EXPERIMENT: Please DO NOT use phase cal signal Thank you Schedule for VLBA_MK (Code Mk ) Page 2 Distribution of SiO masers in AGB stars. 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 22 Jan 2005 Day 22 --- Next scan frequencies: 42810.90 42870.22 43112.35 43112.35 Next BBC frequencies: 610.90 670.22 912.35 912.35 Next scan bandwidths: 8.00 8.00 8.00 8.00 17 03 54 3C345 14 50 39 58.7 44.2 -1.9 -121.4 0 1 1 0 17 03 54 17 14 52 --- 15 01 39 60.5 41.9 -1.7 -125.2 658 F 1 8776 18 37 00 RCAS 16 24 01 1.7 34.9 -7.6 D -59.6 4806 1 1 8776 18 37 00 18 47 58 --- 16 35 01 3.2 35.7 -7.4 -61.7 0 F 1 17552 18 49 12 3C454.3 16 36 15 1.4 73.3 -6.3 D -69.8 43 1 2 17552 18 49 12 19 00 10 --- 16 47 15 3.8 74.2 -6.1 -70.5 0 R 1 8776 19 01 46 RCAS 16 48 51 5.1 36.7 -7.2 -64.3 65 1 1 8776 19 01 46 19 23 42 --- 17 10 51 8.2 38.1 -6.8 -68.5 1316 F 2 8776 19 23 47 RCAS 17 10 55 8.3 38.1 -6.8 -68.5 0 1 1 8776 19 23 42 19 34 45 --- 17 21 55 9.9 38.7 -6.6 -70.5 658 F 2 17611 19 37 38 3C454.3 17 24 49 12.4 77.1 -5.5 -72.7 142 1 2 17611 19 37 38 19 48 37 --- 17 35 49 14.9 77.9 -5.3 -73.3 658 R 2 8835 19 50 22 RCAS 17 37 35 12.2 39.4 -6.4 -73.4 74 1 3 8835 19 50 22 20 12 18 --- 17 59 35 15.5 40.3 -6.0 -77.5 1316 F 1 8717 20 12 23 RCAS 17 59 39 15.5 40.3 -6.0 -77.5 0 1 3 8717 20 12 18 20 23 21 --- 18 10 39 17.2 40.7 -5.8 -79.6 658 F 1 17554 20 25 35 3C454.3 18 12 54 23.5 80.4 -4.7 -75.0 102 1 4 17554 20 25 35 20 36 34 --- 18 23 54 26.0 81.2 -4.5 -75.5 658 R 1 8778 20 38 18 RCAS 18 25 38 19.5 41.1 -5.5 -82.4 71 1 3 8778 20 38 18 21 00 14 --- 18 47 38 22.9 41.4 -5.2 -86.6 1316 F 2 8774 21 00 19 RCAS 18 47 43 22.9 41.4 -5.2 -86.6 0 1 3 8774 21 00 14 21 11 17 --- 18 58 43 24.6 41.5 -5.0 -88.7 658 F 2 17611 21 13 08 3C454.3 19 00 34 34.6 83.6 -3.9 -76.8 77 1 4 17611 21 13 08 21 24 06 --- 19 11 34 37.2 84.3 -3.7 -77.1 658 R 2 8835 21 26 07 RCAS 19 13 36 27.0 41.5 -4.8 -91.6 87 1 5 8835 21 26 07 21 48 04 --- 19 35 36 30.4 41.2 -4.4 -96.0 1316 F 1 8717 Schedule for VLBA_MK (Code Mk ) Page 3 Distribution of SiO masers in AGB stars. 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 22 Jan 2005 Day 22 --- 21 48 08 RCAS 19 35 41 30.4 41.2 -4.4 -96.1 0 1 5 8717 21 48 04 21 59 07 --- 19 46 41 32.1 41.0 -4.2 -98.3 658 F 1 17554 22 01 39 3C454.3 19 49 13 46.0 86.9 -3.1 -78.0 116 1 6 17554 22 01 39 22 12 37 --- 20 00 13 48.6 87.7 -2.9 -78.2 658 R 1 8778 22 14 39 RCAS 20 02 16 34.5 40.5 -3.9 -101.7 85 1 5 8778 22 14 39 22 36 36 --- 20 24 16 37.8 39.4 -3.6 -106.6 1316 F 2 8774 22 38 57 3C454.3 20 26 37 54.8 89.8 -2.5 -78.4 101 1 6 8774 22 38 57 23 00 53 --- 20 48 37 60.0 91.8 -2.1 -78.3 1316 R 2 8874 SETUP FILE INFORMATION: NOTE: If DOPPLER, FREQ, or BW were used, see the individual scans for the final BBC settings. Setup file: bc146_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. = RCP LCP RCP LCP BBC = 1 2 3 4 BBC SB= U U U U IF = A C A C 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= 42810.90 42870.22 43112.35 43112.35 BBC fr= 610.90 670.22 912.35 912.35 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 -- Distribution of SiO masers in AGB stars. 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). Scan hours are for recording scans only. Baseline hours are only counted for scans above horizon at both ends. Source Source position (RA/Dec) (B1950) (J2000) (Date) * RCAS 23 55 52.135204 * 23 58 24.870000 23 58 38.229458 51 06 37.88876 * 51 23 19.70000 51 25 09.44118 From catalog imbedded in main SCHED input file. Doppler based on LSR frame and radio definition. Velocities: 27.00 27.00 27.00 27.00 * 3C454.3 22 51 29.520100 * 22 53 57.748300 22 54 11.204808 15 52 54.35016 * 16 08 53.56300 16 10 25.79497 From catalog imbedded in main SCHED input file. Doppler based on other sources. * 3C345 16 41 17.606463 * 16 42 58.810200 16 43 07.789772 39 54 10.81592 * 39 48 36.99500 39 47 43.75326 From catalog imbedded in main SCHED input file. Doppler based on other sources. 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) RCAS 85.4 3C454.3 51.9 3C345 78.0 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