COVER INFORMATION Station: VLBA_OV (Code Ov ) Experiment: 3C275.1 at 90 cm Exp. Code: BC138C Schedule Version: 1.00 Processed by SCHED version: Release of 18 Sept. 2003 PI: Teddy Cheung Address: MS057 Physics Dept Brandeis University 415 South St. Waltham MA 02454 Phone: 781-736-2867 EMAIL: ccheung@brandeis.edu Fax: 781-736-2915 Phone during observation: 781-736-2867 Observing mode: Continuum Notes: Please use DDS1 type DAT tapes Schedule for VLBA_OV (Code Ov ) Page 2 3C275.1 at 90 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 30 Jan 2004 Day 30 --- Next scan frequencies: 310.99 310.99 318.99 318.99 326.99 326.99 334.99 334.99 Next BBC frequencies: 810.99 810.99 818.99 818.99 826.99 826.99 834.99 834.99 Next scan bandwidths: 8.00 8.00 8.00 8.00 8.00 8.00 8.00 8.00 06 00 00 3C275.1 06 42 12 9.4 76.6 -6.0 H -53.8 0 1 1 0 06 00 00 06 16 00 --- 06 58 15 12.6 78.9 -5.8 -54.5 0 F 1 12800 06 20 00 3C273 07 02 16 7.8 93.4 -5.5 -52.7 224 1 1 12800 06 20 00 06 23 00 --- 07 05 16 8.4 93.8 -5.4 -52.6 180 F 1 15200 06 39 00 3C275.1 07 21 19 17.1 82.2 -5.4 -55.3 937 1 2 15200 06 39 00 06 55 00 --- 07 37 21 20.3 84.5 -5.1 -55.7 960 R 1 7200 06 59 00 3C273 07 41 22 15.5 99.5 -4.8 -51.8 224 1 2 7200 06 59 00 07 02 00 --- 07 44 23 16.1 100.0 -4.7 -51.7 180 R 1 4800 07 18 00 3C275.1 08 00 25 24.8 87.8 -4.7 -56.0 937 1 3 4800 07 18 00 07 34 00 --- 08 16 28 28.0 90.2 -4.5 -56.1 960 F 1 8000 07 38 00 3C273 08 20 29 23.1 106.0 -4.1 -50.0 223 1 3 8000 07 38 00 07 41 00 --- 08 23 29 23.7 106.5 -4.1 -49.8 180 F 1 10400 07 57 00 3C275.1 08 39 32 32.6 93.8 -4.1 -55.9 936 1 4 10400 07 57 00 08 13 00 --- 08 55 34 35.8 96.4 -3.8 -55.5 960 R 1 12000 08 17 00 3C273 08 59 35 30.4 113.3 -3.5 -47.1 223 1 4 12000 08 17 00 08 20 00 --- 09 02 35 31.0 113.9 -3.4 -46.8 180 R 1 9600 08 36 00 3C275.1 09 18 38 40.3 100.4 -3.4 -54.7 935 1 5 9600 08 36 00 08 52 00 --- 09 34 41 43.5 103.5 -3.2 -53.8 960 F 1 3200 08 56 00 3C273 09 38 41 37.3 121.6 -2.8 -42.7 222 1 5 3200 08 56 00 08 59 00 --- 09 41 42 37.9 122.3 -2.8 -42.3 180 F 1 5600 09 15 00 3C275.1 09 57 44 47.9 108.2 -2.8 -52.0 934 1 6 5600 09 15 00 09 31 00 --- 10 13 47 50.9 111.9 -2.5 -50.3 960 R 1 16800 09 35 00 3C273 10 17 48 43.6 131.5 -2.2 -36.6 219 1 6 16800 09 35 00 09 38 00 --- 10 20 48 44.0 132.3 -2.1 -36.1 180 R 1 14400 Schedule for VLBA_OV (Code Ov ) Page 3 3C275.1 at 90 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 30 Jan 2004 Day 30 --- 09 54 00 3C275.1 10 36 51 55.0 118.0 -2.1 -47.1 932 1 7 14400 09 54 00 10 15 00 --- 10 57 54 58.6 124.5 -1.8 -43.1 1260 F 1 2400 10 19 00 3C273 11 01 55 49.5 145.1 -1.5 -27.1 216 1 7 2400 10 19 00 10 22 00 --- 11 04 55 49.8 146.1 -1.4 -26.4 180 F 1 4800 10 38 00 3C275.1 11 20 58 62.2 133.1 -1.4 -37.3 929 1 8 4800 10 38 00 10 59 00 --- 11 42 02 65.0 142.5 -1.0 -30.3 1260 R 1 13600 11 03 00 J1331+3030 11 46 02 67.2 99.4 -1.8 -65.7 205 1 8 13600 11 03 00 11 06 00 =1328+307 11 49 03 67.8 100.1 -1.7 -65.4 180 R 1 11200 11 22 00 3C275.1 12 05 05 67.4 154.9 -0.7 -20.6 917 1 9 11200 11 22 00 11 43 00 --- 12 26 09 68.7 168.0 -0.3 -9.9 1260 F 1 5600 11 47 00 J1331+3030 12 30 09 75.6 113.5 -1.0 -57.9 198 1 9 5600 11 47 00 11 50 00 =1328+307 12 33 10 76.2 115.0 -1.0 -56.9 180 F 1 8000 12 06 00 3C275.1 12 49 13 69.1 183.4 0.1 2.8 908 1 10 8000 12 06 00 12 22 00 --- 13 05 15 68.6 194.0 0.4 11.6 960 R 1 14400 12 26 00 J1331+3030 13 09 16 81.8 144.3 -0.4 -32.7 201 1 10 14400 12 26 00 12 29 00 =1328+307 13 12 16 82.2 148.3 -0.3 -29.1 180 R 1 12000 12 45 00 3C275.1 13 28 19 67.0 208.0 0.7 22.9 914 1 11 12000 12 45 00 13 01 00 --- 13 44 22 65.3 216.5 1.0 29.6 960 F 1 800 13 05 00 J1331+3030 13 48 22 82.4 208.9 0.3 26.5 200 1 11 800 13 05 00 13 08 00 =1328+307 13 51 23 82.1 213.1 0.3 30.3 180 F 1 3200 13 24 00 3C275.1 14 07 25 62.2 227.0 1.4 37.3 914 1 11 3200 13 24 00 13 40 00 --- 14 23 28 59.7 233.1 1.7 41.6 960 F 1 16000 13 44 00 J1331+3030 14 27 29 76.6 244.0 0.9 56.1 200 1 12 16000 13 44 00 13 47 00 =1328+307 14 30 29 76.0 245.5 1.0 57.2 180 R 1 16800 14 03 00 3C275.1 14 46 32 55.9 240.6 2.0 46.3 914 1 12 16800 14 03 00 14 19 00 --- 15 02 34 53.1 245.0 2.3 48.8 960 R 1 4000 14 23 00 J1331+3030 15 06 35 69.2 258.1 1.6 64.7 202 1 12 4000 14 23 00 14 26 00 =1328+307 15 09 36 68.6 258.9 1.6 65.0 180 R 1 1600 Schedule for VLBA_OV (Code Ov ) Page 4 3C275.1 at 90 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 30 Jan 2004 Day 30 --- 14 42 00 3C275.1 15 25 38 48.8 250.7 2.7 51.5 914 1 13 1600 14 42 00 14 58 00 --- 15 41 41 45.8 254.1 3.0 53.0 960 F 1 11200 15 02 00 J1331+3030 15 45 41 61.5 266.3 2.2 67.2 203 1 13 11200 15 02 00 15 05 00 =1328+307 15 48 42 60.9 266.9 2.3 67.3 180 F 1 13600 15 21 00 3C275.1 16 04 45 41.3 258.7 3.3 54.4 915 1 14 13600 15 21 00 15 37 00 --- 16 20 47 38.2 261.5 3.6 55.2 960 R 1 8800 15 41 00 J1331+3030 16 24 48 53.7 272.4 2.9 67.4 203 1 14 8800 15 41 00 15 44 00 =1328+307 16 27 48 53.1 272.8 2.9 67.3 180 R 1 6400 SETUP FILE INFORMATION: NOTE: If DOPPLER, FREQ, or BW were used, see the individual scans for the final BBC settings. Setup file: v90cm.set Matches group v5090n in /home/filehost/cwalker/sched/catalogs/freq.dat Setup group: 1 Station: VLBA Total bit rate: 256 Format: VLBA1:2 Bits per sample: 2 Sample rate: 16.000 Number of channels: 8 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= -500.00 -500.00 -500.00 -500.00 -500.00 -500.00 -500.00 -500.00 Net SB= U U U U U U U U Pol. = RCP LCP RCP LCP RCP LCP RCP LCP BBC = 1 2 3 4 5 6 7 8 BBC SB= U U U U U U U U IF = B D B D B D B D VLBA FE= omit 90cm omit 90cm VLBA Synth= 15.4 15.4 15.4 The following frequency sets based on this setup were used. Frequency Set: 1 Setup file default. Used pcal sets: 1 LO sum= 310.99 310.99 318.99 318.99 326.99 326.99 334.99 334.99 BBC fr= 810.99 810.99 818.99 818.99 826.99 826.99 834.99 834.99 Bandwd= 8.000 8.000 8.000 8.000 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 S5 S7 S1 S3 S5 S7 PCALXB2= S2 S4 S6 S8 S2 S4 S6 S8 PCALFR1= 10 10 10 10 6010 6010 6010 6010 PCALFR2= 10 10 10 10 6010 6010 6010 6010 Track assignments are: track1= 2, 10, 18, 26, 3, 11, 19, 27 barrel=roll_auto SOURCE LIST -- 3C275.1 at 90 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) * 3C275.1 12 41 27.562994 * 12 43 57.657000 12 44 09.965663 16 39 18.09430 * 16 22 53.44000 16 21 26.16991 From catalog imbedded in main SCHED input file. From Hough et al. 2002 J1229+0203 12 26 33.245833 * 12 29 06.699729 12 29 19.221358 1226+023 02 19 43.30569 * 02 03 08.59819 02 01 45.20381 * 3C273 /home/filehost/cwalker/sched/catalogs/sources.vlba 3C273B ICRF - Ext.1 Source - 1998 IERS Annual Report J1229+02 * J1331+3030 13 28 49.657691 * 13 31 08.287984 13 31 19.583474 1328+307 30 45 58.64021 * 30 30 32.95885 30 29 04.78857 3C286 /home/filehost/cwalker/sched/catalogs/sources.vlba J1331+30 VLBA Calib. Survey - ICRF Frame - reduced by GSFC group - Aug 2001 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) 3C275.1 124.1 3C273 123.8 J1331+3030 115.4 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