COVER INFORMATION Station: VLBA_HN (Code Hn ) Experiment: Parsec scale structure in ISM and the nature of 21-cm absorbers Exp. Code: GG074 Schedule Version: 1.00 Processed by SCHED version: 9.40 Release Jan. 13, 2011. PI: Neeraj Gupta Address: ASTRON Postbus 2 7990 AA Dwingeloo The Netherlands Phone: +31-521-595782 EMAIL: gupta@astron.nl Fax: Phone during observation: +31-521-595782 Observing mode: Notes: Concerning this schedule you can also contact Yurii Pidopryhora, pidopryhora@jive.nl, +31-521-596548 COVER LETTER: Block schedule quote: GG074 Eb Wb Jb1 On25 Mc Tr -- EVN Eu 159 1700(08/06)-0300(09/06) 21cm (1396.5 MHz) US 159 1700(08/06)-0500(09/06) VLBA Target: J1243+4043 Delay calibrator: J1242+3751 Bandpass claibrators/fringe-finders: 4C39.25, 3C345 WSRT calibrator: 3C286 In this experiment we observe an HI absorber (with z~0.0169) in front of a ~196 mJy quasar. The peak absorption is at ~1396.47 MHz, which is centered at one of the observation subbands (with 0 frequency offset). !!! PCAL is OFF for this experiment !!! Schedule for VLBA_HN (Code Hn ) Page 2 Parsec scale structure in ISM and the nature of 21-cm absorbers UP: D => Below limits; H => Below horizon mask; W => still slewing at end; blank => Up. Early: Seconds between end of slew and start. Dwell: On source seconds. Disk: GBytes recorded to this point. TPStart: Recording start time. Frequencies are LO sum (band edge). SYNC: Time correlator is expected to sync up. ---------------------------------------------------------------------------------------- Start UT Source Start / Stop Early Disk TPStart Stop UT LST EL AZ HA UP ParA Dwell GBytes SYNC ---------------------------------------------------------------------------------------- --- Wed 8 Jun 2011 Day 159 --- Next scan frequencies: 1390.83 1390.83 1394.77 1394.77 1398.70 1398.70 1402.63 1402.63 Next BBC frequencies: 709.17 709.17 705.23 705.23 701.30 701.30 697.37 697.37 Next scan bandwidths: 4.00 4.00 4.00 4.00 4.00 4.00 4.00 4.00 17 00 00 J1243+4043 05 18 58 14.0 46.7 -7.4 -44.6 0 0 16 59 55 17 11 30 --- 05 30 30 15.5 48.3 -7.2 -46.1 690 11 16 59 56 17 12 00 J1243+4043 05 31 00 15.6 48.4 -7.2 -46.2 24 11 17 11 55 17 23 30 --- 05 42 32 17.2 49.9 -7.0 -47.6 690 22 17 11 56 17 24 30 J1242+3751 05 43 32 15.5 52.4 -7.0 -47.2 48 22 17 24 25 17 26 30 =1240+381 05 45 33 15.8 52.7 -7.0 -47.5 120 24 17 24 26 17 34 30 J1243+4043 05 53 34 18.8 51.4 -6.8 -49.0 468 24 17 34 25 17 46 20 --- 06 05 26 20.5 52.9 -6.7 -50.4 710 36 17 34 26 17 46 50 J1243+4043 06 05 56 20.5 53.0 -6.6 -50.4 24 36 17 46 45 17 58 40 --- 06 17 48 22.3 54.5 -6.4 -51.8 710 47 17 46 46 17 59 40 J1242+3751 06 18 48 20.8 57.2 -6.4 -51.1 49 47 17 59 35 18 01 40 =1240+381 06 20 48 21.1 57.5 -6.4 -51.4 120 50 17 59 36 18 02 40 J1243+4043 06 21 49 22.9 55.0 -6.4 -52.3 49 50 18 02 35 18 14 10 --- 06 33 20 24.6 56.5 -6.2 -53.6 690 61 18 02 36 18 14 40 J1243+4043 06 33 51 24.7 56.5 -6.2 -53.6 24 61 18 14 35 18 26 10 --- 06 45 22 26.5 57.9 -6.0 -54.9 690 72 18 14 36 18 27 10 J1242+3751 06 46 23 25.1 60.8 -6.0 -54.0 49 72 18 27 05 18 29 10 =1240+381 06 48 23 25.5 61.1 -5.9 -54.2 120 74 18 27 06 18 30 10 J1243+4043 06 49 23 27.1 58.4 -5.9 -55.3 49 74 18 30 05 18 41 40 --- 07 00 55 28.9 59.8 -5.7 -56.5 690 85 18 30 06 18 42 10 J1243+4043 07 01 25 29.0 59.9 -5.7 -56.6 24 85 18 42 05 18 53 40 --- 07 12 57 30.8 61.2 -5.5 -57.8 690 96 18 42 06 18 54 40 J1242+3751 07 13 57 29.6 64.3 -5.5 -56.6 49 96 18 54 35 18 56 40 =1240+381 07 15 57 29.9 64.5 -5.5 -56.8 120 98 18 54 36 Schedule for VLBA_HN (Code Hn ) Page 3 Parsec scale structure in ISM and the nature of 21-cm absorbers UP: D => Below limits; H => Below horizon mask; W => still slewing at end; blank => Up. Early: Seconds between end of slew and start. Dwell: On source seconds. Disk: GBytes recorded to this point. TPStart: Recording start time. Frequencies are LO sum (band edge). SYNC: Time correlator is expected to sync up. ---------------------------------------------------------------------------------------- Start UT Source Start / Stop Early Disk TPStart Stop UT LST EL AZ HA UP ParA Dwell GBytes SYNC ---------------------------------------------------------------------------------------- --- Wed 8 Jun 2011 Day 159 --- 19 04 50 4C39.25 07 24 09 66.5 89.1 -2.1 -70.4 403 98 19 04 45 19 09 50 --- 07 29 10 67.4 89.9 -2.0 -70.4 300 103 19 04 46 19 17 20 J1243+4043 07 36 41 34.7 64.0 -5.1 -60.2 366 103 19 17 15 19 28 50 --- 07 48 13 36.6 65.3 -4.9 -61.3 690 115 19 17 16 19 29 20 J1243+4043 07 48 43 36.7 65.4 -4.9 -61.3 24 115 19 29 15 19 40 50 --- 08 00 15 38.6 66.7 -4.7 -62.4 690 126 19 29 16 19 41 50 J1242+3751 08 01 15 37.6 70.1 -4.7 -60.6 50 126 19 41 45 19 43 50 =1240+381 08 03 15 37.9 70.4 -4.7 -60.8 120 128 19 41 46 19 44 50 J1243+4043 08 04 15 39.3 67.1 -4.7 -62.8 50 128 19 44 45 19 56 20 --- 08 15 47 41.2 68.4 -4.5 -63.8 690 139 19 44 46 19 56 50 J1243+4043 08 16 17 41.3 68.5 -4.5 -63.9 24 139 19 56 45 20 08 20 --- 08 27 49 43.3 69.7 -4.3 -64.9 690 150 19 56 46 20 09 20 J1242+3751 08 28 49 42.4 73.5 -4.2 -62.7 49 150 20 09 15 20 11 20 =1240+381 08 30 50 42.7 73.8 -4.2 -62.8 120 152 20 09 16 20 12 20 J1243+4043 08 31 50 44.0 70.2 -4.2 -65.2 49 152 20 12 15 20 23 50 --- 08 43 22 46.0 71.4 -4.0 -66.2 690 163 20 12 16 20 24 20 J1243+4043 08 43 52 46.1 71.5 -4.0 -66.3 24 163 20 24 15 20 35 50 --- 08 55 24 48.1 72.8 -3.8 -67.2 690 175 20 24 16 20 36 50 J1242+3751 08 56 24 47.3 76.9 -3.8 -64.5 49 175 20 36 45 20 38 50 =1240+381 08 58 24 47.6 77.2 -3.8 -64.6 120 177 20 36 46 20 39 50 J1243+4043 08 59 24 48.8 73.2 -3.8 -67.5 49 177 20 39 45 20 51 20 --- 09 10 56 50.8 74.5 -3.6 -68.5 690 188 20 39 46 20 51 50 J1243+4043 09 11 26 50.9 74.5 -3.6 -68.5 24 188 20 51 45 21 03 20 --- 09 22 58 52.9 75.8 -3.4 -69.4 690 199 20 51 46 21 04 20 J1242+3751 09 23 58 52.2 80.5 -3.3 -66.0 49 199 21 04 15 21 06 20 =1240+381 09 25 59 52.6 80.7 -3.3 -66.1 120 201 21 04 16 21 07 20 J1243+4043 09 26 59 53.7 76.3 -3.3 -69.7 49 201 21 07 15 21 18 50 --- 09 38 31 55.7 77.5 -3.1 -70.5 690 212 21 07 16 21 19 20 J1243+4043 09 39 01 55.8 77.6 -3.1 -70.5 24 212 21 19 15 21 30 50 --- 09 50 33 57.9 78.9 -2.9 -71.3 690 223 21 19 16 Schedule for VLBA_HN (Code Hn ) Page 4 Parsec scale structure in ISM and the nature of 21-cm absorbers UP: D => Below limits; H => Below horizon mask; W => still slewing at end; blank => Up. Early: Seconds between end of slew and start. Dwell: On source seconds. Disk: GBytes recorded to this point. TPStart: Recording start time. Frequencies are LO sum (band edge). SYNC: Time correlator is expected to sync up. ---------------------------------------------------------------------------------------- Start UT Source Start / Stop Early Disk TPStart Stop UT LST EL AZ HA UP ParA Dwell GBytes SYNC ---------------------------------------------------------------------------------------- --- Wed 8 Jun 2011 Day 159 --- 21 31 50 J1242+3751 09 51 33 57.2 84.2 -2.9 -67.2 48 223 21 31 45 21 33 50 =1240+381 09 53 33 57.6 84.5 -2.8 -67.2 120 225 21 31 46 21 38 00 4C39.25 09 57 44 83.1 237.6 0.5 52.7 131 225 21 37 55 21 43 00 --- 10 02 45 82.3 242.1 0.6 56.3 300 230 21 37 56 21 47 10 J1243+4043 10 06 55 60.8 80.8 -2.6 -72.3 123 230 21 47 05 21 58 40 --- 10 18 27 62.9 82.2 -2.4 -73.0 690 242 21 47 06 21 59 10 J1243+4043 10 18 57 63.0 82.2 -2.4 -73.0 24 242 21 59 05 22 10 40 --- 10 30 29 65.1 83.7 -2.2 -73.6 690 253 21 59 06 22 11 40 J1242+3751 10 31 29 64.5 90.4 -2.2 -67.9 47 253 22 11 35 22 13 40 =1240+381 10 33 30 64.9 90.7 -2.2 -67.9 120 255 22 11 36 22 14 40 J1243+4043 10 34 30 65.8 84.2 -2.2 -73.8 47 255 22 14 35 22 26 10 --- 10 46 02 67.9 85.7 -2.0 -74.3 690 266 22 14 36 22 26 40 J1243+4043 10 46 32 68.0 85.8 -2.0 -74.3 24 266 22 26 35 22 38 10 --- 10 58 04 70.1 87.4 -1.8 -74.7 690 277 22 26 36 22 39 10 J1242+3751 10 59 04 69.6 95.7 -1.7 -67.2 46 277 22 39 05 22 41 10 =1240+381 11 01 04 69.9 96.2 -1.7 -67.1 120 279 22 39 06 22 42 10 J1243+4043 11 02 04 70.9 88.0 -1.7 -74.7 46 279 22 42 05 22 53 40 --- 11 13 36 73.0 89.9 -1.5 -74.9 690 290 22 42 06 22 54 10 J1243+4043 11 14 06 73.1 90.0 -1.5 -74.9 24 290 22 54 05 23 05 40 --- 11 25 38 75.2 92.1 -1.3 -74.7 690 302 22 54 06 23 06 40 J1242+3751 11 26 39 74.5 102.9 -1.3 -64.5 44 302 23 06 35 23 08 40 =1240+381 11 28 39 74.9 103.6 -1.2 -64.2 120 304 23 06 36 23 09 40 J1243+4043 11 29 39 75.9 92.9 -1.2 -74.6 44 304 23 09 35 23 21 10 --- 11 41 11 78.0 95.5 -1.1 -73.9 690 315 23 09 36 23 21 40 J1243+4043 11 41 41 78.1 95.6 -1.0 -73.9 24 315 23 21 35 23 33 10 --- 11 53 13 80.2 99.0 -0.9 -72.5 690 326 23 21 36 23 34 10 J1242+3751 11 54 13 79.3 114.7 -0.8 -57.3 41 326 23 34 05 23 36 10 =1240+381 11 56 13 79.7 115.8 -0.8 -56.5 120 328 23 34 06 23 37 10 J1243+4043 11 57 14 80.9 100.4 -0.8 -71.7 41 328 23 37 05 23 48 40 --- 12 08 45 83.0 105.7 -0.6 -68.3 690 339 23 37 06 Schedule for VLBA_HN (Code Hn ) Page 5 Parsec scale structure in ISM and the nature of 21-cm absorbers UP: D => Below limits; H => Below horizon mask; W => still slewing at end; blank => Up. Early: Seconds between end of slew and start. Dwell: On source seconds. Disk: GBytes recorded to this point. TPStart: Recording start time. Frequencies are LO sum (band edge). SYNC: Time correlator is expected to sync up. ---------------------------------------------------------------------------------------- Start UT Source Start / Stop Early Disk TPStart Stop UT LST EL AZ HA UP ParA Dwell GBytes SYNC ---------------------------------------------------------------------------------------- --- Start: Wed 8 Jun 2011 Day 159 -- Stop: Thu 9 Jun 2011 Day 160 --- 23 49 10 J1243+4043 12 09 15 83.1 106.0 -0.6 -68.1 24 339 23 49 05 00 00 40 --- 12 20 47 85.0 115.1 -0.4 -60.9 690 351 23 49 06 00 01 40 J1242+3751 12 21 48 83.4 139.5 -0.4 -37.0 35 351 00 01 35 00 03 40 =1240+381 12 23 48 83.6 142.4 -0.3 -34.4 120 353 00 01 36 00 04 40 J1243+4043 12 24 48 85.7 120.0 -0.3 -56.7 35 353 00 04 35 00 16 10 --- 12 36 20 87.3 145.4 -0.1 -33.3 690 364 00 04 36 00 16 40 J1243+4043 12 36 50 87.3 147.1 -0.1 -31.6 23 364 00 16 35 00 28 10 --- 12 48 22 87.6 198.0 0.1 17.3 690 375 00 16 36 00 29 10 J1242+3751 12 49 22 84.7 192.9 0.1 11.9 46 375 00 29 05 00 31 10 =1240+381 12 51 22 84.6 197.0 0.1 15.7 120 377 00 29 06 00 36 10 3C345 12 56 23 48.1 74.2 -3.8 -66.5 201 377 00 36 05 00 41 10 --- 13 01 24 49.0 74.8 -3.7 -66.8 300 382 00 36 06 00 46 10 J1243+4043 13 06 25 85.3 242.9 0.4 59.2 171 382 00 46 05 00 57 40 --- 13 17 57 83.4 252.9 0.6 67.3 690 393 00 46 06 00 58 10 J1243+4043 13 18 27 83.3 253.2 0.6 67.5 24 393 00 58 05 01 09 40 --- 13 29 59 81.2 258.9 0.8 71.3 690 404 00 58 06 01 10 40 J1242+3751 13 30 59 79.6 244.4 0.8 56.6 41 404 01 10 35 01 12 40 =1240+381 13 32 59 79.3 245.5 0.8 57.5 120 406 01 10 36 01 13 40 J1243+4043 13 33 59 80.5 260.4 0.8 72.1 41 406 01 13 35 01 25 10 --- 13 45 31 78.4 263.9 1.0 73.7 690 418 01 13 36 01 25 40 J1243+4043 13 46 01 78.3 264.1 1.0 73.8 24 418 01 25 35 01 37 10 --- 13 57 33 76.2 266.8 1.2 74.5 690 429 01 25 36 01 38 10 J1242+3751 13 58 33 74.8 256.5 1.3 64.3 44 429 01 38 05 01 40 10 =1240+381 14 00 34 74.5 257.2 1.3 64.6 120 431 01 38 06 01 46 10 J1243+4043 14 06 35 74.6 268.6 1.4 74.8 345 431 01 46 05 01 55 10 --- 14 15 36 72.9 270.2 1.5 74.9 540 440 01 46 06 01 55 40 J1243+4043 14 16 06 72.8 270.2 1.5 74.9 24 440 01 55 35 02 04 50 --- 14 25 18 71.2 271.7 1.7 74.8 550 449 01 55 36 02 05 50 J1242+3751 14 26 18 69.8 263.9 1.7 67.1 46 449 02 05 45 02 07 50 =1240+381 14 28 18 69.5 264.4 1.7 67.2 120 451 02 05 46 Schedule for VLBA_HN (Code Hn ) Page 6 Parsec scale structure in ISM and the nature of 21-cm absorbers UP: D => Below limits; H => Below horizon mask; W => still slewing at end; blank => Up. Early: Seconds between end of slew and start. Dwell: On source seconds. Disk: GBytes recorded to this point. TPStart: Recording start time. Frequencies are LO sum (band edge). SYNC: Time correlator is expected to sync up. ---------------------------------------------------------------------------------------- Start UT Source Start / Stop Early Disk TPStart Stop UT LST EL AZ HA UP ParA Dwell GBytes SYNC ---------------------------------------------------------------------------------------- --- Thu 9 Jun 2011 Day 160 --- 02 08 50 J1243+4043 14 29 18 70.4 272.3 1.7 74.7 46 451 02 08 45 02 17 20 --- 14 37 50 68.9 273.6 1.9 74.5 510 459 02 08 46 02 17 50 J1243+4043 14 38 20 68.8 273.6 1.9 74.4 24 459 02 17 45 02 26 20 --- 14 46 51 67.2 274.8 2.0 74.1 510 467 02 17 46 02 27 20 J1242+3751 14 47 51 65.9 268.3 2.1 67.8 47 467 02 27 15 02 29 20 =1240+381 14 49 52 65.5 268.6 2.1 67.8 120 469 02 27 16 02 30 20 J1243+4043 14 50 52 66.5 275.3 2.1 74.0 47 469 02 30 15 02 38 50 --- 14 59 23 64.9 276.4 2.2 73.6 510 477 02 30 16 02 39 20 J1243+4043 14 59 53 64.8 276.5 2.3 73.6 24 477 02 39 15 02 47 50 --- 15 08 25 63.3 277.6 2.4 73.1 510 486 02 39 16 02 48 50 J1242+3751 15 09 25 61.9 271.9 2.4 67.8 48 486 02 48 45 02 50 50 =1240+381 15 11 25 61.6 272.3 2.5 67.8 120 488 02 48 46 02 55 40 3C345 15 16 16 73.4 93.5 -1.5 -72.0 150 488 02 55 35 03 00 00 --- 15 20 37 74.2 94.4 -1.4 -71.8 260 492 02 55 36 03 02 30 J1243+4043 15 23 07 60.6 -80.7 2.6 72.3 13 492 03 02 25 03 14 00 --- 15 34 39 58.5 -79.3 2.8 71.6 690 503 03 02 26 03 14 30 J1243+4043 15 35 09 58.5 -79.3 2.8 71.5 24 503 03 14 25 03 26 00 --- 15 46 41 56.4 -78.0 3.0 70.8 690 514 03 14 26 03 26 50 J1242+3751 15 47 31 55.0 -82.5 3.1 66.7 39 514 03 26 45 03 28 50 =1240+381 15 49 32 54.6 -82.2 3.1 66.6 120 516 03 26 46 03 29 50 J1243+4043 15 50 32 55.7 -77.5 3.1 70.5 49 516 03 29 45 03 41 20 --- 16 02 04 53.6 -76.3 3.3 69.7 690 528 03 29 46 03 41 50 J1243+4043 16 02 34 53.6 -76.2 3.3 69.6 24 528 03 41 45 03 53 20 --- 16 14 06 51.5 -74.9 3.5 68.8 690 539 03 41 46 03 54 10 J1242+3751 16 14 56 50.0 -78.9 3.5 65.4 39 539 03 54 05 03 56 10 =1240+381 16 16 56 49.7 -78.6 3.6 65.3 120 541 03 54 06 03 57 10 J1243+4043 16 17 56 50.8 -74.5 3.6 68.5 49 541 03 57 05 04 08 40 --- 16 29 28 48.8 -73.2 3.7 67.6 690 552 03 57 06 04 09 10 J1243+4043 16 29 58 48.7 -73.2 3.8 67.5 24 552 04 09 05 04 20 40 --- 16 41 30 46.7 -71.9 4.0 66.6 690 563 04 09 06 Schedule for VLBA_HN (Code Hn ) Page 7 Parsec scale structure in ISM and the nature of 21-cm absorbers UP: D => Below limits; H => Below horizon mask; W => still slewing at end; blank => Up. Early: Seconds between end of slew and start. Dwell: On source seconds. Disk: GBytes recorded to this point. TPStart: Recording start time. Frequencies are LO sum (band edge). SYNC: Time correlator is expected to sync up. ---------------------------------------------------------------------------------------- Start UT Source Start / Stop Early Disk TPStart Stop UT LST EL AZ HA UP ParA Dwell GBytes SYNC ---------------------------------------------------------------------------------------- --- Thu 9 Jun 2011 Day 160 --- 04 21 30 J1242+3751 16 42 20 45.2 -75.4 4.0 63.7 39 563 04 21 25 04 23 30 =1240+381 16 44 21 44.8 -75.2 4.0 63.6 120 565 04 21 26 04 24 30 J1243+4043 16 45 21 46.0 -71.5 4.0 66.3 49 565 04 24 25 04 36 00 --- 16 56 53 44.0 -70.2 4.2 65.3 690 577 04 24 26 04 36 30 J1243+4043 16 57 23 44.0 -70.2 4.2 65.2 24 577 04 36 25 04 48 00 --- 17 08 55 42.0 -68.9 4.4 64.2 690 588 04 36 26 04 48 50 J1242+3751 17 09 45 40.3 -72.1 4.4 61.8 39 588 04 48 45 04 50 50 =1240+381 17 11 45 40.0 -71.8 4.5 61.7 120 590 04 48 46 04 55 10 3C345 17 16 06 83.1 245.6 0.5 60.2 18 590 04 55 05 05 00 00 --- 17 20 57 82.3 249.1 0.6 62.9 290 595 04 55 06 SETUP FILE INFORMATION: NOTE: If DOPPLER, FREQ, or BW were used, see the individual scans for the final BBC settings. Setup file: sess211.H128 Matching groups in /aps3/sched9.4/catalogs/freq.dat: v20cm_1 FD and KP filtered below 1330. SC filtered above 1440 Setup group: 1 Station: VLBA_HN Total bit rate: 128 Format: VLBA1:1 Bits per sample: 2 Sample rate: 8.000 Number of channels: 8 DBE type: Speedup factor: 1.00 Disk used to record data. 1st LO= 2100.00 2100.00 2100.00 2100.00 2100.00 2100.00 2100.00 2100.00 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 2.1 15.4 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= 1390.83 1390.83 1394.77 1394.77 1398.70 1398.70 1402.63 1402.63 BBC fr= 709.17 709.17 705.23 705.23 701.30 701.30 697.37 697.37 Bandwd= 4.000 4.000 4.000 4.000 4.000 4.000 4.000 4.000 The following pulse cal sets were used with this setup: Pulse cal detection set: 1 PCAL = OFF PCALXB1= S1 S2 S3 S4 S5 S6 S7 S8 PCALXB2= M1 M2 M3 M4 M5 M6 M7 M8 PCALFR1= 0 0 0 0 0 0 0 0 PCALFR2= 0 0 0 0 0 0 0 0 Track assignments are: track1= 2, 6, 10, 14, 18, 22, 26, 30 barrel=roll_off SOURCES USED IN RECORDING SCANS -- Parsec scale structure in ISM and the nature of 21-cm absorbers 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) * J1243+4043 12 41 32.734570 * 12 43 55.781600 12 44 29.987313 0.00 41 00 22.94680 * 40 43 58.43500 40 40 17.96403 0.00 From catalog imbedded in main SCHED input file. Doppler based on heliocentric frame and optical definition. Velocities: 5051.90 5051.90 5051.90 5051.90 5051.90 5051.90 5051.90 5051.90 8.931 scan and 700.258 baseline hours in setup: sess211.H128 J0927+3902 09 23 55.319213 * 09 27 03.013934 09 27 46.245428 0.29 0923+392 39 15 23.56646 * 39 02 20.85186 38 59 24.55706 0.16 * 4C39.25 /aps3/sched9.4/catalogs/sources.vlba J0927+39 GSFC 2010a astro solution 231732 Observations Doppler based on other sources. 0.167 scan and 18.750 baseline hours in setup: sess211.H128 * J1242+3751 12 40 27.034314 * 12 42 51.369077 12 43 25.855934 0.04 1240+381 38 07 25.41734 * 37 51 00.02525 37 47 18.58321 0.03 J1242+37 /aps3/sched9.4/catalogs/sources.vlba GSFC 2010a astro solution 1290 Observations Doppler based on other sources. 0.800 scan and 62.633 baseline hours in setup: sess211.H128 J1331+3030 13 28 49.657759 * 13 31 08.288051 13 31 41.716249 0.19 * 3C286 30 45 58.64061 * 30 30 32.95925 30 27 03.00073 0.17 1328+307 /aps3/sched9.4/catalogs/sources.vlba J1331+30 GSFC 2010a astro solution 276 Observations Doppler based on other sources. 0.167 scan and 0.833 baseline hours in setup: sess211.H128 J1642+3948 16 41 17.606228 * 16 42 58.809965 16 43 24.330295 0.81 * 3C345 39 54 10.81494 * 39 48 36.99400 39 47 20.92672 0.54 1641+399 /aps3/sched9.4/catalogs/sources.vlba J1642+39 GSFC 2010a astro solution 52595 Observations Doppler based on other sources. 0.236 scan and 18.792 baseline hours in setup: sess211.H128 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) J1243+4043 92.0 4C39.25 57.0 J1242+3751 93.4 3C286 105.8 3C345 117.1 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