COVER INFORMATION Station: VLBA_BR (Code Br ) Experiment: SiO near GC Exp. Code: BM177A Schedule Version: 2.00 Processed by SCHED version: Release of 02 July 2002 PI: Makoto Miyoshi Address: VERA Project Office National Astronomical Observatory 2-21-1, Osawa, Mitaka, Tokyo 181-8588, JAPAN Phone: 81 422 34 3937 EMAIL: miyoshi@miz.nao.ac.jp Fax: 81 422 34 3635 Phone during observation: 81 422 34 3937 Observing mode: VLBA Notes: Totally 4 passes are need, 1 pass for each IF. Exact coordinate of Sgr A* for correlation, which is different from that of the antenna pointing. SOURCE=SGRA RA=17:45:40.0392 DEC=-29:00:28.151 EPOCH=J2000 Schedule for VLBA_BR (Code Br ) Page 2 SiO near GC 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 11 Jan 2003 Day 11 --- Next scan frequencies: 42811.19 42821.19 43112.64 43122.71 Next BBC frequencies: 611.19 621.19 912.64 922.71 Next scan bandwidths: 8.00 8.00 8.00 8.00 13 19 55 NRAO530 12 43 45 1.6 111.8 -4.8 D -39.5 0 1 1 0 13 19 55 13 25 54 --- 12 49 45 2.6 112.9 -4.7 H -39.1 0 F 1 4787 14 08 47 NRAO530 13 32 45 8.9 121.3 -4.0 -35.9 2554 1 1 4787 14 08 47 14 14 46 --- 13 38 45 9.8 122.5 -3.9 -35.3 359 F 1 9574 14 57 39 NRAO530 14 21 45 15.5 131.4 -3.2 -30.9 2555 1 1 9574 14 57 39 15 03 38 --- 14 27 45 16.3 132.8 -3.1 -30.2 359 F 1 14361 15 04 37 SGRA 14 28 45 1.1 138.5 -3.3 D -30.4 26 1 2 14361 15 04 37 15 20 35 --- 14 44 45 2.8 141.5 -3.0 H -28.3 0 R 1 8074 15 22 35 SGRA 14 46 45 3.1 141.9 -3.0 -28.1 113 1 3 8074 15 22 35 15 44 31 --- 15 08 45 5.2 146.2 -2.6 -25.1 1316 F 1 9478 15 46 31 NRAO530 15 10 45 21.1 142.6 -2.4 -24.6 82 1 3 9478 15 46 31 15 52 30 --- 15 16 45 21.7 144.0 -2.3 -23.8 359 F 1 14265 15 53 29 SGRA 15 17 45 6.0 148.0 -2.5 -23.8 22 1 4 14265 15 53 29 16 09 27 --- 15 33 45 7.4 151.3 -2.2 -21.5 957 R 1 8170 16 11 27 SGRA 15 35 45 7.5 151.7 -2.2 -21.2 113 1 5 8170 16 11 27 16 33 23 --- 15 57 45 9.1 156.3 -1.8 -17.9 1316 F 1 9382 16 35 23 NRAO530 15 59 45 25.4 154.7 -1.6 -17.0 81 1 5 9382 16 35 23 16 41 22 --- 16 05 45 25.8 156.3 -1.5 -16.0 359 F 1 14168 16 42 21 SGRA 16 06 45 9.7 158.2 -1.7 -16.5 22 1 6 14168 16 42 21 16 58 19 --- 16 22 45 10.6 161.6 -1.4 -13.9 957 R 1 8266 17 00 18 SGRA 16 24 45 10.7 162.0 -1.4 -13.6 113 1 7 8266 17 00 18 17 22 15 --- 16 46 45 11.7 166.8 -1.0 -10.0 1316 F 1 9285 17 24 15 NRAO530 16 48 45 28.0 167.7 -0.7 -8.4 81 1 7 9285 17 24 15 17 30 14 --- 16 54 45 28.2 169.4 -0.6 -7.3 359 F 1 14072 17 31 13 SGRA 16 55 45 12.0 168.8 -0.8 -8.5 22 1 8 14072 17 31 13 17 47 11 --- 17 11 45 12.5 172.4 -0.6 -5.8 957 R 1 8363 Schedule for VLBA_BR (Code Br ) Page 3 SiO near GC 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 11 Jan 2003 Day 11 --- 17 49 10 SGRA 17 13 45 12.5 172.8 -0.5 -5.5 113 1 9 8363 17 49 10 18 11 07 --- 17 35 45 12.8 177.7 -0.2 -1.7 1316 F 1 9189 18 13 07 NRAO530 17 37 45 28.8 181.3 0.1 0.9 82 1 9 9189 18 13 07 18 19 06 --- 17 43 45 28.7 182.9 0.2 2.0 359 F 1 13976 18 20 05 SGRA 17 44 45 12.9 179.8 0.0 -0.2 22 1 10 13976 18 20 05 18 36 03 --- 18 00 45 12.8 183.3 0.2 2.6 957 R 1 8459 18 38 02 SGRA 18 02 45 12.8 183.8 0.3 2.9 113 1 11 8459 18 38 02 18 59 59 --- 18 24 45 12.4 188.7 0.6 6.6 1316 F 1 9093 19 01 59 NRAO530 18 26 45 27.6 194.8 0.9 10.0 83 1 11 9093 19 01 59 19 07 58 --- 18 32 45 27.4 196.4 1.0 11.1 359 F 1 13880 19 08 57 SGRA 18 33 45 12.1 190.7 0.8 8.1 23 1 12 13880 19 08 57 19 24 55 --- 18 49 45 11.5 194.2 1.1 10.8 957 R 1 8555 19 26 54 SGRA 18 51 45 11.5 194.7 1.1 11.1 113 1 13 8555 19 26 54 19 48 51 --- 19 13 45 10.4 199.4 1.5 14.7 1316 F 1 8997 19 50 50 NRAO530 19 15 45 24.7 207.6 1.7 18.5 85 1 13 8997 19 50 50 19 56 49 --- 19 21 45 24.2 209.2 1.8 19.5 359 F 1 13784 19 57 49 SGRA 19 22 45 9.9 201.4 1.6 16.1 25 1 14 13784 19 57 49 20 13 47 --- 19 38 45 8.8 204.7 1.9 18.6 957 R 1 8651 ----------- Tape Change ------------ 20 15 46 SGRA 19 40 45 8.7 205.2 1.9 18.9 113 2 1 8651 20 15 46 20 37 43 --- 20 02 45 7.0 209.7 2.3 22.2 1316 F 1 8901 20 39 42 NRAO530 20 04 45 20.1 219.6 2.5 25.9 87 2 1 8901 20 39 42 20 45 41 --- 20 10 45 19.5 221.0 2.6 26.7 359 F 1 13688 20 46 41 SGRA 20 11 45 6.2 211.5 2.4 23.5 27 2 2 13688 20 46 41 21 02 39 --- 20 27 45 4.8 214.7 2.7 25.8 957 R 1 8747 21 04 38 SGRA 20 29 45 4.6 215.1 2.7 26.0 113 2 2 8747 21 04 38 21 09 38 --- 20 34 45 4.1 216.1 2.8 26.7 299 R 1 4758 21 10 37 NRAO530 20 35 45 16.6 226.6 3.0 29.9 29 2 3 4758 21 10 37 21 16 36 --- 20 41 45 15.9 227.9 3.1 30.6 359 F 1 29 SETUP FILE INFORMATION: NOTE: If DOPPLER, FREQ, or BW were used, see the individual scans for the final BBC settings. Setup file: bm177.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: 1 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 LCP BBC = 1 2 3 4 BBC SB= U U U U IF = C C C 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= 42811.19 42821.19 43112.64 43122.71 BBC fr= 611.19 621.19 912.64 922.71 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 barrel=roll_auto SOURCE LIST -- SiO near GC 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) 1730-130 17 30 13.535185 * 17 33 02.705782 17 33 10.672821 J1733-13 -13 02 45.83980 *-13 04 49.54828 -13 05 00.11961 * NRAO530 From catalog imbedded in main SCHED input file. USNO - Ref Frame 1998-6, Eubanks June 1998 * SGRA 17 42 30.276485 * 17 45 41.000000 17 45 49.962688 -28 59 00.48534 *-29 00 10.00000 -29 00 15.46892 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) NRAO530 29.4 SGRA 24.8 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