COVER INFORMATION Station: VLBA_NL (Code Nl ) Experiment: Exploratory follow up on a serendipitous discovery of a lens candidate Exp. Code: bk151 Schedule Version: 1.00 Processed by SCHED version: 6.05 June 2006 PI: Yuri Kovalev Address: MPIfR Auf dem Huegel 69, 53121 Bonn Germany Phone: +49-228-525-125 (w) / +49-228-850-7823 (h) EMAIL: ykovalev@mpifr-bonn.mpg.de Fax: +49-228-525-229 Phone during observation: +49-163-191-9961 (mobile) Observing mode: 2, 6, 18 cm continuum with corpol: 256-8-2 Notes: Two correlator passes are required on 0633-26A and 0633-26B Fringe finder: 0923+392 Schedule for VLBA_NL (Code Nl ) Page 2 Exploratory follow up on a serendipitous discovery of a lens candidate 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. For disks, the footages are really the GBytes 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 ---------------------------------------------------------------------------------------- --- Mon 7 Apr 2008 Day 98 --- Next scan frequencies: 4971.49 4971.49 4979.49 4979.49 4987.49 4987.49 4995.49 4995.49 Next BBC frequencies: 871.49 871.49 879.49 879.49 887.49 887.49 895.49 895.49 Next scan bandwidths: 8.00 8.00 8.00 8.00 8.00 8.00 8.00 8.00 22 36 13 0923+392 05 36 11 46.7 73.6 -3.9 -67.0 0 1 1 0 22 36 03 22 39 42 --- 05 39 41 47.3 74.0 -3.8 -67.3 209 F 1 7 22 36 21 Next scan frequencies: 15349.49 15349.49 15357.49 15357.49 15365.49 15365.49 15373.49 15373.49 Next BBC frequencies: 749.49 749.49 757.49 757.49 765.49 765.49 773.49 773.49 22 39 42 0923+392 05 39 41 47.3 74.0 -3.8 -67.3 -4 1 1 7 22 39 42 22 44 41 --- 05 44 41 48.2 74.5 -3.7 -67.7 295 F 1 17 22 39 42 Next scan frequencies: 1651.49 1651.49 1659.49 1659.49 1667.49 1667.49 1675.49 1675.49 Next BBC frequencies: 748.51 748.51 740.51 740.51 732.51 732.51 724.51 724.51 22 44 41 0923+392 05 44 41 48.2 74.5 -3.7 -67.7 -4 1 1 17 22 44 41 22 48 11 --- 05 48 11 48.8 74.9 -3.7 -67.9 205 F 1 23 22 45 14 22 48 11 0633-263 05 48 11 21.0 168.6 -0.8 -9.5 -68 1 1 23 Stopped 22 49 51 --- 05 49 51 21.1 169.0 -0.8 -9.1 31 S 1 27 22 49 51 0633-263 05 49 51 21.1 169.0 -0.8 -9.1 -4 1 1 27 22 49 51 22 54 13 --- 05 54 14 21.2 170.0 -0.7 -8.3 258 F 1 35 22 50 09 Next scan frequencies: 15349.49 15349.49 15357.49 15357.49 15365.49 15365.49 15373.49 15373.49 Next BBC frequencies: 749.49 749.49 757.49 757.49 765.49 765.49 773.49 773.49 22 54 13 0633-263 05 54 14 21.2 170.0 -0.7 -8.3 -4 1 1 35 22 54 13 23 02 42 --- 06 02 44 21.4 172.1 -0.5 -6.6 505 F 1 52 22 54 46 Schedule for VLBA_NL (Code Nl ) Page 3 Exploratory follow up on a serendipitous discovery of a lens candidate 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. For disks, the footages are really the GBytes 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 ---------------------------------------------------------------------------------------- --- Mon 7 Apr 2008 Day 98 --- Next scan frequencies: 4971.49 4971.49 4979.49 4979.49 4987.49 4987.49 4995.49 4995.49 Next BBC frequencies: 871.49 871.49 879.49 879.49 887.49 887.49 895.49 895.49 23 02 42 0633-263 06 02 44 21.4 172.1 -0.5 -6.6 -4 1 1 52 23 02 42 23 06 55 --- 06 06 58 21.5 173.1 -0.5 -5.7 249 F 1 60 23 02 42 Next scan frequencies: 1651.49 1651.49 1659.49 1659.49 1667.49 1667.49 1675.49 1675.49 Next BBC frequencies: 748.51 748.51 740.51 740.51 732.51 732.51 724.51 724.51 23 06 55 0633-263 06 06 58 21.5 173.1 -0.5 -5.7 -4 1 1 60 23 06 55 23 11 17 --- 06 11 21 21.6 174.1 -0.4 -4.9 258 F 1 68 23 07 28 Next scan frequencies: 15349.49 15349.49 15357.49 15357.49 15365.49 15365.49 15373.49 15373.49 Next BBC frequencies: 749.49 749.49 757.49 757.49 765.49 765.49 773.49 773.49 23 11 17 0633-263 06 11 21 21.6 174.1 -0.4 -4.9 -4 1 1 68 23 11 17 23 19 46 --- 06 19 51 21.8 176.2 -0.3 -3.2 505 F 1 85 23 11 50 Next scan frequencies: 4971.49 4971.49 4979.49 4979.49 4987.49 4987.49 4995.49 4995.49 Next BBC frequencies: 871.49 871.49 879.49 879.49 887.49 887.49 895.49 895.49 23 19 46 0633-263 06 19 51 21.8 176.2 -0.3 -3.2 -4 1 1 85 23 19 46 23 23 59 --- 06 24 05 21.8 177.2 -0.2 -2.3 249 F 1 93 23 19 46 Next scan frequencies: 1651.49 1651.49 1659.49 1659.49 1667.49 1667.49 1675.49 1675.49 Next BBC frequencies: 748.51 748.51 740.51 740.51 732.51 732.51 724.51 724.51 23 23 59 0633-263 06 24 05 21.8 177.2 -0.2 -2.3 -4 1 1 93 23 23 59 23 28 21 --- 06 28 28 21.9 178.3 -0.1 -1.4 258 F 1 101 23 24 32 Schedule for VLBA_NL (Code Nl ) Page 4 Exploratory follow up on a serendipitous discovery of a lens candidate 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. For disks, the footages are really the GBytes 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 ---------------------------------------------------------------------------------------- --- Mon 7 Apr 2008 Day 98 --- Next scan frequencies: 15349.49 15349.49 15357.49 15357.49 15365.49 15365.49 15373.49 15373.49 Next BBC frequencies: 749.49 749.49 757.49 757.49 765.49 765.49 773.49 773.49 23 28 21 0633-263 06 28 28 21.9 178.3 -0.1 -1.4 -4 1 1 101 23 28 21 23 36 50 --- 06 36 58 21.9 180.3 0.0 0.3 505 F 1 118 23 28 54 Next scan frequencies: 4971.49 4971.49 4979.49 4979.49 4987.49 4987.49 4995.49 4995.49 Next BBC frequencies: 871.49 871.49 879.49 879.49 887.49 887.49 895.49 895.49 23 36 50 0633-263 06 36 58 21.9 180.3 0.0 0.3 -4 1 1 118 23 36 50 23 41 03 --- 06 41 12 21.9 181.3 0.1 1.1 249 F 1 126 23 36 50 Next scan frequencies: 1651.49 1651.49 1659.49 1659.49 1667.49 1667.49 1675.49 1675.49 Next BBC frequencies: 748.51 748.51 740.51 740.51 732.51 732.51 724.51 724.51 23 41 03 0633-263 06 41 12 21.9 181.3 0.1 1.1 -4 1 1 126 23 41 03 23 45 26 --- 06 45 35 21.8 182.4 0.2 2.0 258 F 1 134 23 41 36 Next scan frequencies: 15349.49 15349.49 15357.49 15357.49 15365.49 15365.49 15373.49 15373.49 Next BBC frequencies: 749.49 749.49 757.49 757.49 765.49 765.49 773.49 773.49 23 45 26 0633-263 06 45 35 21.8 182.4 0.2 2.0 -4 1 1 134 23 45 26 23 53 54 --- 06 54 05 21.7 184.4 0.3 3.7 505 F 1 151 23 45 59 Next scan frequencies: 4971.49 4971.49 4979.49 4979.49 4987.49 4987.49 4995.49 4995.49 Next BBC frequencies: 871.49 871.49 879.49 879.49 887.49 887.49 895.49 895.49 23 53 54 0633-263 06 54 05 21.7 184.4 0.3 3.7 -4 1 1 151 23 53 54 23 58 07 --- 06 58 19 21.7 185.5 0.4 4.5 249 F 1 159 23 53 54 Schedule for VLBA_NL (Code Nl ) Page 5 Exploratory follow up on a serendipitous discovery of a lens candidate 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. For disks, the footages are really the GBytes 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 ---------------------------------------------------------------------------------------- --- Start: Mon 7 Apr 2008 Day 98 -- Stop: Tue 8 Apr 2008 Day 99 --- Next scan frequencies: 1651.49 1651.49 1659.49 1659.49 1667.49 1667.49 1675.49 1675.49 Next BBC frequencies: 748.51 748.51 740.51 740.51 732.51 732.51 724.51 724.51 23 58 07 0633-263 06 58 19 21.7 185.5 0.4 4.5 -4 1 1 159 23 58 07 00 02 30 --- 07 02 42 21.6 186.5 0.5 5.4 258 F 1 167 23 58 40 Next scan frequencies: 15349.49 15349.49 15357.49 15357.49 15365.49 15365.49 15373.49 15373.49 Next BBC frequencies: 749.49 749.49 757.49 757.49 765.49 765.49 773.49 773.49 00 02 30 0633-263 07 02 42 21.6 186.5 0.5 5.4 -4 1 1 167 00 02 30 00 10 58 --- 07 11 12 21.4 188.5 0.6 7.1 505 F 1 184 00 03 03 Next scan frequencies: 4971.49 4971.49 4979.49 4979.49 4987.49 4987.49 4995.49 4995.49 Next BBC frequencies: 871.49 871.49 879.49 879.49 887.49 887.49 895.49 895.49 00 10 58 0633-263 07 11 12 21.4 188.5 0.6 7.1 -4 1 1 184 00 10 58 00 15 12 --- 07 15 26 21.3 189.6 0.7 7.9 249 F 1 192 00 10 58 Next scan frequencies: 1651.49 1651.49 1659.49 1659.49 1667.49 1667.49 1675.49 1675.49 Next BBC frequencies: 748.51 748.51 740.51 740.51 732.51 732.51 724.51 724.51 00 15 12 0633-263 07 15 26 21.3 189.6 0.7 7.9 -4 1 1 192 00 15 12 00 19 34 --- 07 19 49 21.1 190.6 0.7 8.8 258 F 1 200 00 15 45 Next scan frequencies: 15349.49 15349.49 15357.49 15357.49 15365.49 15365.49 15373.49 15373.49 Next BBC frequencies: 749.49 749.49 757.49 757.49 765.49 765.49 773.49 773.49 00 19 34 0633-263 07 19 49 21.1 190.6 0.7 8.8 -4 1 1 200 00 19 34 00 28 03 --- 07 28 19 20.8 192.6 0.9 10.5 505 F 1 217 00 20 07 Schedule for VLBA_NL (Code Nl ) Page 6 Exploratory follow up on a serendipitous discovery of a lens candidate 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. For disks, the footages are really the GBytes 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 ---------------------------------------------------------------------------------------- --- Tue 8 Apr 2008 Day 99 --- Next scan frequencies: 4971.49 4971.49 4979.49 4979.49 4987.49 4987.49 4995.49 4995.49 Next BBC frequencies: 871.49 871.49 879.49 879.49 887.49 887.49 895.49 895.49 00 28 03 0633-263 07 28 19 20.8 192.6 0.9 10.5 -4 1 1 217 00 28 03 00 32 16 --- 07 32 33 20.6 193.6 0.9 11.3 249 F 1 225 00 28 03 Next scan frequencies: 1651.49 1651.49 1659.49 1659.49 1667.49 1667.49 1675.49 1675.49 Next BBC frequencies: 748.51 748.51 740.51 740.51 732.51 732.51 724.51 724.51 00 32 16 0633-263 07 32 33 20.6 193.6 0.9 11.3 -4 1 1 225 00 32 16 00 36 38 --- 07 36 56 20.4 194.6 1.0 12.1 258 F 1 233 00 32 49 Next scan frequencies: 15349.49 15349.49 15357.49 15357.49 15365.49 15365.49 15373.49 15373.49 Next BBC frequencies: 749.49 749.49 757.49 757.49 765.49 765.49 773.49 773.49 00 36 38 0633-263 07 36 56 20.4 194.6 1.0 12.1 -4 1 1 233 00 36 38 00 45 07 --- 07 45 26 20.0 196.6 1.2 13.8 505 F 1 250 00 37 11 Next scan frequencies: 4971.49 4971.49 4979.49 4979.49 4987.49 4987.49 4995.49 4995.49 Next BBC frequencies: 871.49 871.49 879.49 879.49 887.49 887.49 895.49 895.49 00 45 07 0633-263 07 45 26 20.0 196.6 1.2 13.8 -4 1 1 250 00 45 07 00 49 20 --- 07 49 40 19.8 197.6 1.2 14.6 249 F 1 258 00 45 07 Next scan frequencies: 1651.49 1651.49 1659.49 1659.49 1667.49 1667.49 1675.49 1675.49 Next BBC frequencies: 748.51 748.51 740.51 740.51 732.51 732.51 724.51 724.51 00 49 20 0633-263 07 49 40 19.8 197.6 1.2 14.6 -4 1 1 258 00 49 20 00 53 42 --- 07 54 03 19.5 198.6 1.3 15.4 258 F 1 266 00 49 53 Schedule for VLBA_NL (Code Nl ) Page 7 Exploratory follow up on a serendipitous discovery of a lens candidate 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. For disks, the footages are really the GBytes 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 ---------------------------------------------------------------------------------------- --- Tue 8 Apr 2008 Day 99 --- Next scan frequencies: 15349.49 15349.49 15357.49 15357.49 15365.49 15365.49 15373.49 15373.49 Next BBC frequencies: 749.49 749.49 757.49 757.49 765.49 765.49 773.49 773.49 00 53 42 0633-263 07 54 03 19.5 198.6 1.3 15.4 -4 1 1 266 00 53 42 01 02 11 --- 08 02 33 19.0 200.5 1.4 17.0 505 F 1 283 00 54 15 Next scan frequencies: 4971.49 4971.49 4979.49 4979.49 4987.49 4987.49 4995.49 4995.49 Next BBC frequencies: 871.49 871.49 879.49 879.49 887.49 887.49 895.49 895.49 01 02 11 0633-263 08 02 33 19.0 200.5 1.4 17.0 -4 1 1 283 01 02 11 01 06 24 --- 08 06 47 18.7 201.5 1.5 17.7 249 F 1 291 01 02 11 Next scan frequencies: 1651.49 1651.49 1659.49 1659.49 1667.49 1667.49 1675.49 1675.49 Next BBC frequencies: 748.51 748.51 740.51 740.51 732.51 732.51 724.51 724.51 01 06 24 0633-263 08 06 47 18.7 201.5 1.5 17.7 -4 1 1 291 01 06 24 01 10 46 --- 08 11 10 18.4 202.5 1.6 18.5 258 F 1 299 01 06 57 Next scan frequencies: 15349.49 15349.49 15357.49 15357.49 15365.49 15365.49 15373.49 15373.49 Next BBC frequencies: 749.49 749.49 757.49 757.49 765.49 765.49 773.49 773.49 01 10 46 0633-263 08 11 10 18.4 202.5 1.6 18.5 -4 1 1 299 01 10 46 01 19 15 --- 08 19 40 17.8 204.4 1.7 20.1 505 F 1 316 01 11 19 Next scan frequencies: 4971.49 4971.49 4979.49 4979.49 4987.49 4987.49 4995.49 4995.49 Next BBC frequencies: 871.49 871.49 879.49 879.49 887.49 887.49 895.49 895.49 01 19 15 0633-263 08 19 40 17.8 204.4 1.7 20.1 -4 1 1 316 01 19 15 01 23 28 --- 08 23 54 17.4 205.3 1.8 20.8 249 F 1 324 01 19 15 Schedule for VLBA_NL (Code Nl ) Page 8 Exploratory follow up on a serendipitous discovery of a lens candidate 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. For disks, the footages are really the GBytes 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 ---------------------------------------------------------------------------------------- --- Tue 8 Apr 2008 Day 99 --- Next scan frequencies: 1651.49 1651.49 1659.49 1659.49 1667.49 1667.49 1675.49 1675.49 Next BBC frequencies: 748.51 748.51 740.51 740.51 732.51 732.51 724.51 724.51 01 23 28 0633-263 08 23 54 17.4 205.3 1.8 20.8 -4 1 1 324 01 23 28 01 27 51 --- 08 28 17 17.1 206.2 1.9 21.6 258 F 1 332 01 24 01 Next scan frequencies: 15349.49 15349.49 15357.49 15357.49 15365.49 15365.49 15373.49 15373.49 Next BBC frequencies: 749.49 749.49 757.49 757.49 765.49 765.49 773.49 773.49 01 27 51 0633-263 08 28 17 17.1 206.2 1.9 21.6 -4 1 1 332 01 27 51 01 36 19 --- 08 36 47 16.3 208.1 2.0 23.1 505 F 1 349 01 28 24 Next scan frequencies: 4971.49 4971.49 4979.49 4979.49 4987.49 4987.49 4995.49 4995.49 Next BBC frequencies: 871.49 871.49 879.49 879.49 887.49 887.49 895.49 895.49 01 36 19 0633-263 08 36 47 16.3 208.1 2.0 23.1 -4 1 1 349 01 36 19 01 40 33 --- 08 41 01 16.0 209.0 2.1 23.8 249 F 1 357 01 36 19 Next scan frequencies: 1651.49 1651.49 1659.49 1659.49 1667.49 1667.49 1675.49 1675.49 Next BBC frequencies: 748.51 748.51 740.51 740.51 732.51 732.51 724.51 724.51 01 40 33 0633-263 08 41 01 16.0 209.0 2.1 23.8 -4 1 1 357 01 40 33 01 44 55 --- 08 45 24 15.6 209.9 2.2 24.5 258 F 1 366 01 41 06 Next scan frequencies: 15349.49 15349.49 15357.49 15357.49 15365.49 15365.49 15373.49 15373.49 Next BBC frequencies: 749.49 749.49 757.49 757.49 765.49 765.49 773.49 773.49 01 44 55 0633-263 08 45 24 15.6 209.9 2.2 24.5 -4 1 1 366 01 44 55 01 53 23 --- 08 53 54 14.8 211.7 2.3 25.9 505 F 1 382 01 45 28 Schedule for VLBA_NL (Code Nl ) Page 9 Exploratory follow up on a serendipitous discovery of a lens candidate 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. For disks, the footages are really the GBytes 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 ---------------------------------------------------------------------------------------- --- Tue 8 Apr 2008 Day 99 --- Next scan frequencies: 4971.49 4971.49 4979.49 4979.49 4987.49 4987.49 4995.49 4995.49 Next BBC frequencies: 871.49 871.49 879.49 879.49 887.49 887.49 895.49 895.49 01 53 23 0633-263 08 53 54 14.8 211.7 2.3 25.9 -4 1 1 382 01 53 23 01 57 37 --- 08 58 08 14.3 212.6 2.4 26.6 249 F 1 390 01 53 23 Next scan frequencies: 1651.49 1651.49 1659.49 1659.49 1667.49 1667.49 1675.49 1675.49 Next BBC frequencies: 748.51 748.51 740.51 740.51 732.51 732.51 724.51 724.51 01 57 37 0633-263 08 58 08 14.3 212.6 2.4 26.6 -4 1 1 390 01 57 37 02 01 59 --- 09 02 31 13.9 213.5 2.4 27.3 258 F 1 399 01 58 10 Next scan frequencies: 15349.49 15349.49 15357.49 15357.49 15365.49 15365.49 15373.49 15373.49 Next BBC frequencies: 749.49 749.49 757.49 757.49 765.49 765.49 773.49 773.49 02 01 59 0633-263 09 02 31 13.9 213.5 2.4 27.3 -4 1 1 399 02 01 59 02 10 28 --- 09 11 01 13.0 215.2 2.6 28.7 505 F 1 415 02 02 32 Next scan frequencies: 4971.49 4971.49 4979.49 4979.49 4987.49 4987.49 4995.49 4995.49 Next BBC frequencies: 871.49 871.49 879.49 879.49 887.49 887.49 895.49 895.49 02 10 28 0633-263 09 11 01 13.0 215.2 2.6 28.7 -4 1 1 415 02 10 28 02 14 41 --- 09 15 15 12.5 216.1 2.7 29.3 249 F 1 423 02 10 28 02 17 15 0923+392 09 17 50 86.7 145.3 -0.2 -33.1 0 1 1 423 02 17 05 02 20 45 --- 09 21 20 87.0 156.2 -0.1 -22.8 209 F 1 430 02 17 23 Next scan frequencies: 15349.49 15349.49 15357.49 15357.49 15365.49 15365.49 15373.49 15373.49 Next BBC frequencies: 749.49 749.49 757.49 757.49 765.49 765.49 773.49 773.49 02 20 45 0923+392 09 21 20 87.0 156.2 -0.1 -22.8 -4 1 1 430 02 20 45 02 25 44 --- 09 26 20 87.2 174.9 0.0 -4.9 295 F 1 440 02 20 45 Schedule for VLBA_NL (Code Nl ) Page 10 Exploratory follow up on a serendipitous discovery of a lens candidate 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. For disks, the footages are really the GBytes 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 ---------------------------------------------------------------------------------------- --- Tue 8 Apr 2008 Day 99 --- Next scan frequencies: 1651.49 1651.49 1659.49 1659.49 1667.49 1667.49 1675.49 1675.49 Next BBC frequencies: 748.51 748.51 740.51 740.51 732.51 732.51 724.51 724.51 02 25 44 0923+392 09 26 20 87.2 174.9 0.0 -4.9 -4 1 1 440 02 25 44 02 29 14 --- 09 29 50 87.2 188.9 0.0 8.6 205 F 1 447 02 26 17 02 31 09 1328+307 09 31 46 41.3 83.1 -4.0 -59.2 18 1 1 447 02 30 59 02 36 08 --- 09 36 46 42.2 83.8 -3.9 -59.3 299 F 1 457 02 31 17 SETUP FILE INFORMATION: NOTE: If DOPPLER, FREQ, or BW were used, see the individual scans for the final BBC settings. Setup file: /home/filehost/cwalker/sched/setups/v6cm-256-8-2.set Matches group v6cm_2 in /home/filehost/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 Speedup factor: 1.00 Disk used to record data. 1st LO= 4100.00 4100.00 4100.00 4100.00 4100.00 4100.00 4100.00 4100.00 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 = A C A C A C A C VLBA FE= 6cm omit 6cm omit VLBA Synth= 15.4 4.1 15.4 The following frequency sets based on this setup were used. Frequency Set: 3 Setup file default. Used pcal sets: 1 LO sum= 4971.49 4971.49 4979.49 4979.49 4987.49 4987.49 4995.49 4995.49 BBC fr= 871.49 871.49 879.49 879.49 887.49 887.49 895.49 895.49 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_off Setup file: /home/filehost/cwalker/sched/setups/v2cm-256-8-2.set Matches group v2cm_d3 in /home/filehost/cwalker/sched/catalogs/freq.dat Fourth 2cm filter Setup group: 13 Station: VLBA_NL Total bit rate: 256 Format: VLBA1:2 Bits per sample: 2 Sample rate: 16.000 Number of channels: 8 Speedup factor: 1.00 Disk used to record data. 1st LO= 14600.00 14600.00 14600.00 14600.00 14600.00 14600.00 14600.00 14600.00 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 2cm omit 2cm VLBA Synth= 14.6 10.9 10.9 The following frequency sets based on this setup were used. Frequency Set: 12 Setup file default. Used pcal sets: 1 LO sum= 15349.49 15349.49 15357.49 15357.49 15365.49 15365.49 15373.49 15373.49 BBC fr= 749.49 749.49 757.49 757.49 765.49 765.49 773.49 773.49 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_off Setup file: /home/filehost/cwalker/sched/setups/v18cm-256-8-2.set Matches group v20cm_2 in /home/filehost/cwalker/sched/catalogs/freq.dat FD filtered above 1760. SC filtered above 1740. Setup group: 23 Station: VLBA_NL Total bit rate: 256 Format: VLBA1:2 Bits per sample: 2 Sample rate: 16.000 Number of channels: 8 Speedup factor: 1.00 Disk used to record data. 1st LO= 2400.00 2400.00 2400.00 2400.00 2400.00 2400.00 2400.00 2400.00 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= L L L L L L L L IF = A C A C A C A C VLBA FE= 20cm omit 20cm omit VLBA Synth= 15.4 2.4 15.4 The following frequency sets based on this setup were used. Frequency Set: 21 Setup file default. Used pcal sets: 1 LO sum= 1651.49 1651.49 1659.49 1659.49 1667.49 1667.49 1675.49 1675.49 BBC fr= 748.51 748.51 740.51 740.51 732.51 732.51 724.51 724.51 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_off SOURCE LIST -- Exploratory follow up on a serendipitous discovery of a lens candidate 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) * 0633-263 06 33 19.109504 * 06 35 20.163018 06 35 40.310915 0.00 J0635-2620 -26 18 18.33369 *-26 20 47.83847 -26 21 21.29822 0.00 From catalog imbedded in main SCHED input file. 3.414 scan hours, 147.414 baseline hours above horizon. J0927+3902 09 23 55.319214 * 09 27 03.013935 09 27 35.837488 0.00 * 0923+392 39 15 23.56646 * 39 02 20.85186 39 00 16.76292 0.00 4C39.25 From catalog imbedded in main SCHED input file. 2007c_astro Petrov catalog 0.399 scan hours, 15.976 baseline hours above horizon. J1331+3030 13 28 49.657756 * 13 31 08.288048 13 31 33.415154 0.00 * 1328+307 30 45 58.64059 * 30 30 32.95923 30 27 46.60934 0.00 3C286 From catalog imbedded in main SCHED input file. 2006a_astro Petrov catalog 0.083 scan hours, 2.992 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) 0633-263 85.9 0923+392 111.1 1328+307 141.9 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