COVER INFORMATION Station: VLBA_NL (Code Nl ) Experiment: BW085 / Lens J0134-0931 / Winn and Keeton Exp. Code: BW085 Schedule Version: 1.00 Processed by SCHED version: 6.02 July 2005 PI: Joshua N. Winn Address: Harvard-Smithsonian Center for Astrophysics 60 Garden St. MS-51 Cambridge, MA 02138 Phone: +1-617-384-9663 (w) / +1-617-666-2341 (h) EMAIL: jwinn@cfa.harvard.edu Fax: +1-617-495-7093 Phone during observation: +1-617-384-9663 (w) / +1-617-666-2341 (h) Observing mode: Standard 4cm band, 256-8-2 Notes: 256 Mbps has been approved for BW085 fringe finders: J2253+1608, J0555+3948 Schedule for VLBA_NL (Code Nl ) Page 2 BW085 / Lens J0134-0931 / Winn and Keeton 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). SYNC: Time correlator is expected to sync up. 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) SYNC ---------------------------------------------------------------------------------------- --- Fri 30 Dec 2005 Day 364 --- Next scan frequencies: 8399.49 8399.49 8407.49 8407.49 8415.49 8415.49 8423.49 8423.49 Next BBC frequencies: 799.49 799.49 807.49 807.49 815.49 815.49 823.49 823.49 Next scan bandwidths: 8.00 8.00 8.00 8.00 8.00 8.00 8.00 8.00 22 15 00 GL0134 22 46 30 25.8 132.7 -2.8 -33.8 0 1 1 0 Stopped 22 20 00 --- 22 51 31 26.5 133.9 -2.7 -33.0 300 S 1 0 22 30 00 GL0134 23 01 33 27.9 136.2 -2.6 -31.6 591 1 1 0 22 30 00 22 39 00 --- 23 10 34 29.0 138.4 -2.4 -30.1 540 F 1 7200 22 30 08 22 39 00 J0141-0928 23 10 34 28.2 136.7 -2.5 -31.2 -8 1 1 7200 22 39 00 22 40 00 =0138-097 23 11 34 28.3 137.0 -2.5 -31.1 52 F 1 8000 22 39 00 22 40 00 GL0134 23 11 34 29.1 138.6 -2.4 -30.0 -8 1 1 8000 22 40 00 22 49 00 --- 23 20 36 30.2 140.9 -2.2 -28.5 532 F 1 15200 22 40 00 22 49 00 J0141-0928 23 20 36 29.4 139.1 -2.4 -29.6 -8 1 1 15200 22 49 00 22 50 00 =0138-097 23 21 36 29.5 139.4 -2.3 -29.5 52 F 1 16000 22 49 00 22 50 00 GL0134 23 21 36 30.3 141.1 -2.2 -28.3 -8 1 2 16000 22 50 00 22 59 00 --- 23 30 37 31.4 143.4 -2.1 -26.8 532 R 1 12000 22 50 00 22 59 00 J0141-0928 23 30 37 30.6 141.6 -2.2 -28.0 -7 1 2 12000 22 59 00 23 00 00 =0138-097 23 31 37 30.7 141.9 -2.2 -27.8 53 R 1 11200 22 59 00 23 00 00 GL0134 23 31 37 31.5 143.7 -2.1 -26.6 -7 1 2 11200 23 00 00 23 09 00 --- 23 40 39 32.4 146.0 -1.9 -25.0 533 R 1 4000 23 00 00 23 09 00 J0141-0928 23 40 39 31.7 144.2 -2.0 -26.2 -7 1 2 4000 23 09 00 23 10 00 =0138-097 23 41 39 31.8 144.5 -2.0 -26.1 53 R 1 3200 23 09 00 23 10 00 GL0134 23 41 39 32.5 146.3 -1.9 -24.8 -7 1 3 3200 23 10 00 23 19 00 --- 23 50 41 33.4 148.7 -1.7 -23.1 533 F 1 4000 23 10 00 23 19 00 J0141-0928 23 50 41 32.8 146.9 -1.9 -24.4 -7 1 3 4000 23 19 00 23 20 00 =0138-097 23 51 41 32.9 147.1 -1.8 -24.2 53 F 1 4800 23 19 00 23 20 00 GL0134 23 51 41 33.5 149.0 -1.7 -22.9 -7 1 3 4800 23 20 00 23 29 00 --- 00 00 42 34.4 151.5 -1.6 -21.2 533 F 1 12000 23 20 00 Schedule for VLBA_NL (Code Nl ) Page 3 BW085 / Lens J0134-0931 / Winn and Keeton 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). SYNC: Time correlator is expected to sync up. 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) SYNC ---------------------------------------------------------------------------------------- --- Fri 30 Dec 2005 Day 364 --- 23 29 00 J0141-0928 00 00 42 33.8 149.6 -1.7 -22.5 -7 1 3 12000 23 29 00 23 30 00 =0138-097 00 01 42 33.9 149.9 -1.7 -22.3 53 F 1 12800 23 29 00 23 30 00 GL0134 00 01 42 34.5 151.8 -1.6 -21.0 -7 1 4 12800 23 30 00 23 39 00 --- 00 10 44 35.2 154.3 -1.4 -19.1 533 R 1 15200 23 30 00 23 39 00 J0141-0928 00 10 44 34.7 152.4 -1.5 -20.5 -7 1 4 15200 23 39 00 23 40 00 =0138-097 00 11 44 34.8 152.6 -1.5 -20.3 53 R 1 14400 23 39 00 23 40 00 GL0134 00 11 44 35.3 154.6 -1.4 -18.9 -7 1 4 14400 23 40 00 23 49 00 --- 00 20 45 36.0 157.2 -1.2 -17.0 533 R 1 7200 23 40 00 23 49 00 J0141-0928 00 20 45 35.5 155.2 -1.3 -18.5 -7 1 4 7200 23 49 00 23 50 00 =0138-097 00 21 46 35.6 155.5 -1.3 -18.3 53 R 1 6400 23 49 00 23 50 00 GL0134 00 21 46 36.1 157.5 -1.2 -16.8 -7 1 5 6400 23 50 00 23 59 00 --- 00 30 47 36.7 160.2 -1.1 -14.9 533 F 1 800 23 50 00 23 59 00 J0141-0928 00 30 47 36.3 158.1 -1.2 -16.4 -7 1 5 800 23 59 00 23 59 59 =0138-097 00 31 47 36.3 158.4 -1.2 -16.1 52 F 1 1600 23 59 00 --- Sat 31 Dec 2005 Day 365 --- 00 00 00 GL0134 00 31 47 36.7 160.4 -1.1 -14.7 -7 1 5 1600 00 00 00 00 09 00 --- 00 40 49 37.3 163.2 -0.9 -12.7 533 F 1 8800 00 00 08 00 09 00 J0141-0928 00 40 49 36.9 161.1 -1.0 -14.2 -7 1 5 8800 00 09 00 00 10 00 =0138-097 00 41 49 37.0 161.4 -1.0 -14.0 53 F 1 9600 00 09 00 00 12 00 J2253+1608 00 43 49 55.2 230.8 1.8 37.0 68 1 5 9600 00 12 00 00 18 00 =2251+158 00 49 50 54.4 232.8 1.9 38.2 360 F 1 14400 00 12 08 00 18 00 GL0134 00 49 50 37.7 165.9 -0.8 -10.6 -51 1 6 14400 00 18 00 00 27 00 --- 00 58 52 38.1 168.7 -0.6 -8.5 489 R 1 13600 00 18 00 00 27 00 J0141-0928 00 58 52 37.8 166.6 -0.7 -10.1 -7 1 6 13600 00 27 00 00 28 00 =0138-097 00 59 52 37.9 166.9 -0.7 -9.9 53 R 1 12800 00 27 00 00 28 00 GL0134 00 59 52 38.1 169.0 -0.6 -8.3 -7 1 6 12800 00 28 00 00 37 00 --- 01 08 53 38.4 171.8 -0.4 -6.2 533 R 1 5600 00 28 00 00 37 00 J0141-0928 01 08 53 38.2 169.7 -0.5 -7.8 -7 1 6 5600 00 37 00 00 38 00 =0138-097 01 09 54 38.3 170.0 -0.5 -7.6 53 R 1 4800 00 37 00 Schedule for VLBA_NL (Code Nl ) Page 4 BW085 / Lens J0134-0931 / Winn and Keeton 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). SYNC: Time correlator is expected to sync up. 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) SYNC ---------------------------------------------------------------------------------------- --- Sat 31 Dec 2005 Day 365 --- 00 38 00 GL0134 01 09 54 38.4 172.1 -0.4 -5.9 -7 1 7 4800 00 38 00 00 47 00 --- 01 18 55 38.6 175.0 -0.3 -3.8 533 F 1 2400 00 38 00 00 47 00 J0141-0928 01 18 55 38.5 172.8 -0.4 -5.4 -7 1 7 2400 00 47 00 00 48 00 =0138-097 01 19 55 38.5 173.1 -0.4 -5.2 53 F 1 3200 00 47 00 00 48 00 GL0134 01 19 55 38.6 175.3 -0.2 -3.6 -7 1 7 3200 00 48 00 00 57 00 --- 01 28 57 38.7 178.1 -0.1 -1.4 533 F 1 10400 00 48 00 00 57 00 J0141-0928 01 28 57 38.7 176.0 -0.2 -3.1 -7 1 7 10400 00 57 00 00 58 00 =0138-097 01 29 57 38.7 176.3 -0.2 -2.8 53 F 1 11200 00 57 00 00 58 00 GL0134 01 29 57 38.7 178.4 -0.1 -1.2 -7 1 8 11200 00 58 00 01 07 00 --- 01 38 58 38.7 181.3 0.1 1.0 533 R 1 16800 00 58 00 01 07 00 J0141-0928 01 38 58 38.8 179.1 0.0 -0.7 -7 1 8 16800 01 07 00 01 08 00 =0138-097 01 39 58 38.8 179.4 0.0 -0.4 53 R 1 16000 01 07 00 01 08 00 GL0134 01 39 58 38.7 181.6 0.1 1.2 -7 1 8 16000 01 08 00 01 17 00 --- 01 49 00 38.6 184.5 0.2 3.4 533 R 1 8800 01 08 00 01 17 00 J0141-0928 01 49 00 38.8 182.3 0.1 1.7 -7 1 8 8800 01 17 00 01 18 00 =0138-097 01 50 00 38.7 182.6 0.1 2.0 53 R 1 8000 01 17 00 01 18 00 GL0134 01 50 00 38.6 184.8 0.3 3.6 -7 1 8 8000 01 18 00 01 27 00 --- 01 59 02 38.4 187.6 0.4 5.7 533 R 1 800 01 18 00 01 27 00 J0141-0928 01 59 02 38.6 185.5 0.3 4.1 -7 1 8 800 01 27 00 01 28 00 =0138-097 02 00 02 38.6 185.8 0.3 4.4 53 R 1 0 01 27 00 01 28 00 GL0134 02 00 02 38.4 187.9 0.4 6.0 -7 1 9 0 01 28 00 01 37 00 --- 02 09 03 38.1 190.7 0.6 8.1 533 F 1 7200 01 28 00 01 37 00 J0141-0928 02 09 03 38.4 188.6 0.5 6.5 -7 1 9 7200 01 37 00 01 38 00 =0138-097 02 10 03 38.4 188.9 0.5 6.7 53 F 1 8000 01 37 00 01 38 00 GL0134 02 10 03 38.1 191.0 0.6 8.3 -7 1 9 8000 01 38 00 01 47 00 --- 02 19 05 37.7 193.8 0.7 10.4 533 F 1 15200 01 38 00 01 47 00 J0141-0928 02 19 05 38.1 191.7 0.6 8.8 -7 1 9 15200 01 47 00 01 48 00 =0138-097 02 20 05 38.0 192.0 0.6 9.1 53 F 1 16000 01 47 00 Schedule for VLBA_NL (Code Nl ) Page 5 BW085 / Lens J0134-0931 / Winn and Keeton 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). SYNC: Time correlator is expected to sync up. 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) SYNC ---------------------------------------------------------------------------------------- --- Sat 31 Dec 2005 Day 365 --- 01 48 00 GL0134 02 20 05 37.7 194.1 0.8 10.6 -7 1 10 16000 01 48 00 01 57 00 --- 02 29 07 37.3 196.9 0.9 12.7 533 R 1 12000 01 48 00 01 57 00 J0141-0928 02 29 07 37.6 194.8 0.8 11.1 -7 1 10 12000 01 57 00 01 58 00 =0138-097 02 30 07 37.6 195.1 0.8 11.4 53 R 1 11200 01 57 00 01 58 00 GL0134 02 30 07 37.2 197.2 0.9 12.9 -7 1 10 11200 01 58 00 02 07 00 --- 02 39 08 36.7 199.9 1.1 14.9 533 R 1 4000 01 58 00 02 07 00 J0141-0928 02 39 08 37.1 197.9 1.0 13.4 -7 1 10 4000 02 07 00 02 08 00 =0138-097 02 40 08 37.1 198.2 1.0 13.6 53 R 1 3200 02 07 00 02 10 00 J0237+2848 02 42 09 77.0 183.8 0.1 3.3 34 1 11 3200 02 10 00 02 16 00 =0234+285 02 48 10 76.9 189.6 0.2 8.2 360 F 1 1600 02 10 08 02 16 00 3C48 02 48 10 73.7 243.9 1.2 53.2 -42 1 11 1600 02 16 00 02 22 00 --- 02 54 11 72.7 246.5 1.3 54.8 318 F 1 6400 02 16 00 02 32 00 GL0134 03 04 12 34.8 207.1 1.5 20.2 518 1 11 6400 02 32 00 02 41 00 --- 03 13 14 34.0 209.7 1.6 22.0 540 F 1 13600 02 32 08 02 41 00 J0141-0928 03 13 14 34.6 207.8 1.5 20.6 -7 1 11 13600 02 41 00 02 42 00 =0138-097 03 14 14 34.6 208.1 1.5 20.8 53 F 1 14400 02 41 00 02 42 00 GL0134 03 14 14 33.9 209.9 1.7 22.2 -7 1 12 14400 02 42 00 02 51 00 --- 03 23 15 33.0 212.4 1.8 23.9 533 R 1 13600 02 42 00 02 51 00 J0141-0928 03 23 15 33.7 210.6 1.7 22.6 -7 1 12 13600 02 51 00 02 52 00 =0138-097 03 24 16 33.6 210.8 1.7 22.8 53 R 1 12800 02 51 00 02 52 00 GL0134 03 24 16 32.9 212.7 1.8 24.1 -7 1 12 12800 02 52 00 03 01 00 --- 03 33 17 32.0 215.1 2.0 25.7 533 R 1 5600 02 52 00 03 01 00 J0141-0928 03 33 17 32.7 213.3 1.9 24.5 -7 1 12 5600 03 01 00 03 02 00 =0138-097 03 34 17 32.6 213.5 1.9 24.7 53 R 1 4800 03 01 00 03 02 00 GL0134 03 34 17 31.9 215.3 2.0 25.9 -7 1 13 4800 03 02 00 03 11 00 --- 03 43 19 30.9 217.6 2.1 27.5 533 F 1 2400 03 02 00 03 11 00 J0141-0928 03 43 19 31.7 215.9 2.0 26.3 -8 1 13 2400 03 11 00 03 12 00 =0138-097 03 44 19 31.6 216.2 2.0 26.5 52 F 1 3200 03 11 00 Schedule for VLBA_NL (Code Nl ) Page 6 BW085 / Lens J0134-0931 / Winn and Keeton 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). SYNC: Time correlator is expected to sync up. 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) SYNC ---------------------------------------------------------------------------------------- --- Sat 31 Dec 2005 Day 365 --- 03 12 00 GL0134 03 44 19 30.8 217.9 2.2 27.7 -8 1 13 3200 03 12 00 03 21 00 --- 03 53 20 29.7 220.2 2.3 29.2 532 F 1 10400 03 12 00 03 21 00 J0141-0928 03 53 20 30.6 218.5 2.2 28.1 -8 1 13 10400 03 21 00 03 22 00 =0138-097 03 54 20 30.4 218.7 2.2 28.2 52 F 1 11200 03 21 00 03 22 00 GL0134 03 54 20 29.6 220.4 2.3 29.4 -8 1 14 11200 03 22 00 03 31 00 --- 04 03 22 28.5 222.6 2.5 30.8 532 R 1 16800 03 22 00 03 31 00 J0141-0928 04 03 22 29.4 221.0 2.4 29.7 -8 1 14 16800 03 31 00 03 32 00 =0138-097 04 04 22 29.2 221.2 2.4 29.9 52 R 1 16000 03 31 00 03 32 00 GL0134 04 04 22 28.3 222.9 2.5 31.0 -8 1 14 16000 03 32 00 03 41 00 --- 04 13 24 27.2 225.0 2.6 32.3 532 R 1 8800 03 32 00 03 41 00 J0141-0928 04 13 24 28.1 223.4 2.5 31.3 -8 1 14 8800 03 41 00 03 42 00 =0138-097 04 14 24 28.0 223.6 2.5 31.5 52 R 1 8000 03 41 00 03 42 00 GL0134 04 14 24 27.0 225.2 2.7 32.5 -8 1 14 8000 03 42 00 03 51 00 --- 04 23 25 25.8 227.3 2.8 33.8 532 R 1 800 03 42 00 03 51 00 J0141-0928 04 23 25 26.8 225.8 2.7 32.8 -8 1 14 800 03 51 00 03 52 00 =0138-097 04 24 25 26.7 226.0 2.7 32.9 52 R 1 0 03 51 00 ----------- Tape Change ------------ 03 52 00 GL0134 04 24 25 25.7 227.5 2.8 33.9 -8 2 1 0 03 52 00 04 01 00 --- 04 33 27 24.4 229.6 3.0 35.1 532 F 1 7200 03 52 00 04 01 00 J0141-0928 04 33 27 25.4 228.1 2.9 34.2 -8 2 1 7200 04 01 00 04 02 00 =0138-097 04 34 27 25.3 228.3 2.9 34.4 52 F 1 8000 04 01 00 04 02 00 GL0134 04 34 27 24.3 229.8 3.0 35.3 -8 2 1 8000 04 02 00 04 11 00 --- 04 43 29 23.0 231.8 3.1 36.4 532 F 1 15200 04 02 00 04 11 00 J0141-0928 04 43 29 24.0 230.3 3.0 35.6 -8 2 1 15200 04 11 00 04 12 00 =0138-097 04 44 29 23.9 230.5 3.0 35.7 52 F 1 16000 04 11 00 04 12 00 GL0134 04 44 29 22.8 232.0 3.2 36.6 -8 2 2 16000 04 12 00 04 15 00 --- 04 47 29 22.4 232.6 3.2 36.9 172 R 1 16800 04 12 00 SETUP FILE INFORMATION: NOTE: If DOPPLER, FREQ, or BW were used, see the individual scans for the final BBC settings. Setup file: vlba.4cm Matches group v4cm_3 in /home/arana/cwalker/sched/catalogs/freq.dat Setup group: 3 Station: VLBA_NL 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 used at high density at 160.000 ips. Time per pass is 22.00 minutes. 1st LO= 7600.00 7600.00 7600.00 7600.00 7600.00 7600.00 7600.00 7600.00 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 4cm omit 4cm VLBA Synth= 7.6 15.4 15.4 The following frequency sets based on this setup were used. Frequency Set: 3 Setup file default. Used pcal sets: 1 LO sum= 8399.49 8399.49 8407.49 8407.49 8415.49 8415.49 8423.49 8423.49 BBC fr= 799.49 799.49 807.49 807.49 815.49 815.49 823.49 823.49 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= 510 510 510 510 6510 6510 6510 6510 PCALFR2= 510 510 510 510 6510 6510 6510 6510 Track assignments are: track1= 2, 10, 18, 26, 3, 11, 19, 27 barrel=roll_auto SOURCE LIST -- BW085 / Lens J0134-0931 / Winn and Keeton 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) Error (B1950) (J2000) (Date) (mas) * GL0134 01 32 06.404241 * 01 34 35.666870 01 34 53.889532 0.00 -09 46 23.09567 *-09 31 02.86710 -09 29 14.88792 0.00 From catalog imbedded in main SCHED input file. 4.700 scan hours, 288.045 baseline hours above horizon. J0137+3309 01 34 49.826428 * 01 37 41.299494 01 38 01.882241 0.90 0134+329 32 54 20.25964 * 33 09 35.13382 33 11 37.02034 0.91 * 3C48 /home/arana/cwalker/sched/catalogs/sources.vlba J0137+33 VLBA Calib Srcs - GSFC sols. - catalog 2004f_astro 0.100 scan hours, 4.946 baseline hours above horizon. * J0141-0928 01 38 56.858733 * 01 41 25.832165 01 41 44.059830 0.22 0138-097 -09 43 51.64872 *-09 28 43.67423 -09 26 56.90595 0.33 J0141-09 /home/arana/cwalker/sched/catalogs/sources.vlba VLBA Calib Srcs - GSFC sols. - catalog 2004f_astro 0.516 scan hours, 25.273 baseline hours above horizon. * J0237+2848 02 34 55.589591 * 02 37 52.405678 02 38 14.073945 0.23 0234+285 28 35 11.40780 * 28 48 08.99005 28 49 53.77144 0.40 J0237+28 /home/arana/cwalker/sched/catalogs/sources.vlba VLBA Calib Srcs - GSFC sols. - catalog 2004f_astro 0.100 scan hours, 6.484 baseline hours above horizon. * J2253+1608 22 51 29.519743 * 22 53 57.747942 22 54 14.634144 0.31 2251+158 15 52 54.34803 * 16 08 53.56086 16 10 49.58108 0.20 3C454.3 /home/arana/cwalker/sched/catalogs/sources.vlba J2253+16 VLBA Calib Srcs - GSFC sols. - catalog 2004f_astro 0.100 scan hours, 6.491 baseline hours above horizon. 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) GL0134 98.4 3C48 113.8 J0141-0928 99.9 J0237+2848 125.7 J2253+1608 73.3 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