COVER INFORMATION Station: SHANGHAI (Code Sh ) Experiment: PSR B1257+12 planetary system studies with EVN Exp. Code: EY013D Schedule Version: 1.00 Processed by SCHED version: 9.40 Release Jan. 13, 2011. PI: Zhen Yan Address: Shanghai Astronomical Observatory NO.80 Nandan Road Shanghai China Phone: 86-13402136110 EMAIL: yanzhen@shao.ac.cn,zshen@shao.ac.cn Fax: 86-21-64281104 Phone during observation: 86-13402136110 Observing mode: Phase-referencing of a source at 18cm (1024 Mb/s) Notes: Target source: PSR B1257+12, s=2mJy(1.4GHz) Phase calibrator: J1300+141A Fringe finde J0927+3902, J1310+3220, J1522+3144 Use SCHED version 9.4 Schedule for SHANGHAI (Code Sh ) Page 2 PSR B1257+12 planetary system studies with EVN 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 ---------------------------------------------------------------------------------------- --- Mon 5 Mar 2012 Day 65 --- Next scan frequencies: 1610.49 1610.49 1610.49 1610.49 1642.49 1642.49 1642.49 1642.49 1674.49 1674.49 1674.49 1674.49 1706.49 1706.49 1706.49 1706.49 Next BBC frequencies: 689.51 689.51 689.51 689.51 657.51 657.51 657.51 657.51 625.51 625.51 625.51 625.51 593.51 593.51 593.51 593.51 Next scan bandwidths: 16.00 16.00 16.00 16.00 16.00 16.00 16.00 16.00 16.00 16.00 16.00 16.00 16.00 16.00 16.00 16.00 20 30 00 J0927+3902 15 30 44 18.5 -55.0 6.0 64.5 0 0 20 30 00 20 38 00 =0923+392 15 38 45 17.1 -54.3 6.2 63.5 480 62 20 30 01 20 43 30 J1300+141A 15 44 16 49.0 255.1 2.7 58.6 17 62 20 43 30 20 45 30 =1257+145 15 46 17 48.6 255.5 2.8 58.8 120 77 20 43 31 20 45 30 1257+12 15 46 17 47.7 253.5 2.8 57.3 -6 77 No stop 20 55 30 --- 15 56 18 45.6 255.4 2.9 58.1 594 155 20 45 31 20 56 10 J1300+141A 15 56 58 46.4 257.5 2.9 59.6 34 155 20 56 10 20 57 50 =1257+145 15 58 39 46.0 257.7 3.0 59.7 100 168 20 56 11 20 57 50 1257+12 15 58 39 45.1 255.8 3.0 58.3 -6 168 No stop 21 01 10 --- 16 01 59 44.5 256.4 3.0 58.5 194 194 20 57 51 21 01 50 J1300+141A 16 02 39 45.2 258.4 3.0 59.9 34 194 21 01 50 21 03 20 =1257+145 16 04 09 44.9 258.7 3.1 60.0 90 205 21 01 51 21 03 20 1257+12 16 04 09 44.0 256.8 3.1 58.7 -6 205 No stop 21 06 40 --- 16 07 30 43.3 257.4 3.1 58.9 194 231 21 03 21 21 06 40 J1300+141A 16 07 30 44.2 259.3 3.1 60.2 -6 231 No stop 21 08 10 =1257+145 16 09 00 43.9 259.5 3.1 60.3 84 243 21 06 41 21 08 10 1257+12 16 09 00 43.0 257.7 3.1 59.0 -6 243 No stop 21 11 30 --- 16 12 21 42.3 258.2 3.2 59.2 194 268 21 08 11 21 12 10 J1300+141A 16 13 01 43.0 260.2 3.2 60.5 34 268 21 12 10 21 13 40 =1257+145 16 14 31 42.7 260.4 3.2 60.6 90 280 21 12 11 21 13 40 1257+12 16 14 31 41.8 258.6 3.2 59.3 -6 280 No stop 21 17 00 --- 16 17 52 41.1 259.2 3.3 59.5 194 306 21 13 41 Schedule for SHANGHAI (Code Sh ) Page 3 PSR B1257+12 planetary system studies with EVN 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 ---------------------------------------------------------------------------------------- --- Mon 5 Mar 2012 Day 65 --- 21 17 00 J1300+141A 16 17 52 42.0 261.0 3.3 60.7 -6 306 No stop 21 18 30 =1257+145 16 19 22 41.7 261.2 3.3 60.8 84 317 21 17 01 21 18 30 1257+12 16 19 22 40.8 259.4 3.3 59.6 -6 317 No stop 21 21 50 --- 16 22 42 40.1 259.9 3.4 59.8 194 343 21 18 31 21 22 30 J1300+141A 16 23 23 40.8 261.8 3.4 61.0 34 343 21 22 30 21 24 00 =1257+145 16 24 53 40.5 262.1 3.4 61.0 90 355 21 22 31 21 24 00 1257+12 16 24 53 39.7 260.3 3.4 59.9 -6 355 No stop 21 27 20 --- 16 28 13 38.9 260.8 3.5 60.0 194 381 21 24 01 21 27 20 J1300+141A 16 28 13 39.8 262.6 3.5 61.2 -6 381 No stop 21 28 50 =1257+145 16 29 44 39.5 262.8 3.5 61.2 84 392 21 27 21 21 28 50 1257+12 16 29 44 38.6 261.0 3.5 60.1 -6 392 No stop 21 32 10 --- 16 33 04 37.9 261.6 3.5 60.2 194 418 21 28 51 21 32 50 J1300+141A 16 33 44 38.6 263.4 3.5 61.3 34 418 21 32 50 21 34 20 =1257+145 16 35 15 38.3 263.6 3.6 61.4 90 430 21 32 51 21 34 20 1257+12 16 35 15 37.5 261.9 3.6 60.3 -6 430 No stop 21 37 40 --- 16 38 35 36.8 262.4 3.6 60.4 194 455 21 34 21 21 37 40 J1300+141A 16 38 35 37.6 264.1 3.6 61.5 -6 455 No stop 21 39 10 =1257+145 16 40 05 37.3 264.3 3.7 61.5 84 467 21 37 41 21 39 10 1257+12 16 40 05 36.4 262.6 3.7 60.5 -6 467 No stop 21 42 30 --- 16 43 26 35.7 263.1 3.7 60.6 194 493 21 39 11 21 43 10 J1300+141A 16 44 06 36.4 264.9 3.7 61.6 34 493 21 43 10 21 44 40 =1257+145 16 45 36 36.1 265.1 3.7 61.7 90 504 21 43 11 21 44 40 1257+12 16 45 36 35.3 263.4 3.7 60.7 -6 504 No stop 21 48 00 --- 16 48 57 34.5 263.9 3.8 60.8 194 530 21 44 41 21 48 00 J1300+141A 16 48 57 35.4 265.6 3.8 61.7 -6 530 No stop 21 49 30 =1257+145 16 50 27 35.1 265.8 3.8 61.8 84 542 21 48 01 21 49 30 1257+12 16 50 27 34.2 264.1 3.8 60.8 -6 542 No stop 21 52 50 --- 16 53 48 33.5 264.6 3.9 60.9 194 568 21 49 31 21 53 30 J1300+141A 16 54 28 34.2 266.4 3.9 61.8 34 568 21 53 30 21 55 00 =1257+145 16 55 58 33.9 266.6 3.9 61.9 90 579 21 53 31 Schedule for SHANGHAI (Code Sh ) Page 4 PSR B1257+12 planetary system studies with EVN 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 ---------------------------------------------------------------------------------------- --- Mon 5 Mar 2012 Day 65 --- 21 55 00 1257+12 16 55 58 33.1 264.9 3.9 60.9 -6 579 No stop 21 58 20 --- 16 59 18 32.3 265.4 4.0 61.0 194 605 21 55 01 21 58 20 J1300+141A 16 59 18 33.2 267.0 4.0 61.9 -6 605 No stop 21 59 50 =1257+145 17 00 49 32.9 267.2 4.0 61.9 84 617 21 58 21 21 59 50 1257+12 17 00 49 32.0 265.6 4.0 61.0 -6 617 No stop 22 03 10 --- 17 04 09 31.3 266.1 4.1 61.1 194 643 21 59 51 22 03 50 J1300+141A 17 04 49 32.0 267.8 4.1 62.0 34 643 22 03 50 22 05 20 =1257+145 17 06 20 31.7 268.0 4.1 62.0 90 654 22 03 51 22 05 20 1257+12 17 06 20 30.8 266.4 4.1 61.1 -6 654 No stop 22 08 40 --- 17 09 40 30.1 266.8 4.1 61.2 194 680 22 05 21 22 08 40 J1300+141A 17 09 40 31.0 268.4 4.1 62.0 -6 680 No stop 22 10 10 =1257+145 17 11 10 30.6 268.6 4.2 62.0 84 692 22 08 41 22 10 10 1257+12 17 11 10 29.8 267.0 4.2 61.2 -6 692 No stop 22 13 30 --- 17 14 31 29.1 267.5 4.2 61.2 194 717 22 10 11 22 14 10 J1300+141A 17 15 11 29.8 269.2 4.2 62.0 34 717 22 14 10 22 15 40 =1257+145 17 16 41 29.5 269.4 4.3 62.0 90 729 22 14 11 22 15 40 1257+12 17 16 41 28.6 267.8 4.3 61.3 -6 729 No stop 22 19 00 --- 17 20 02 27.9 268.2 4.3 61.3 194 755 22 15 41 22 19 00 J1300+141A 17 20 02 28.7 269.8 4.3 62.0 -6 755 No stop 22 20 30 =1257+145 17 21 32 28.4 270.0 4.3 62.0 84 766 22 19 01 22 20 30 1257+12 17 21 32 27.6 268.4 4.3 61.3 -6 766 No stop 22 23 50 --- 17 24 53 26.9 268.9 4.4 61.3 194 792 22 20 31 22 24 30 J1300+141A 17 25 33 27.6 270.5 4.4 62.0 34 792 22 24 30 22 26 00 =1257+145 17 27 03 27.2 270.7 4.4 62.0 90 804 22 24 31 22 26 00 1257+12 17 27 03 26.4 269.1 4.4 61.3 -6 804 No stop 22 29 20 --- 17 30 24 25.7 269.6 4.5 61.3 194 830 22 26 01 22 29 20 J1300+141A 17 30 24 26.5 271.1 4.5 62.0 -6 830 No stop 22 30 50 =1257+145 17 31 54 26.2 271.3 4.5 62.0 84 841 22 29 21 22 30 50 1257+12 17 31 54 25.4 269.8 4.5 61.3 -5 841 No stop 22 34 10 --- 17 35 14 24.7 270.2 4.6 61.3 195 867 22 30 51 Schedule for SHANGHAI (Code Sh ) Page 5 PSR B1257+12 planetary system studies with EVN 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 ---------------------------------------------------------------------------------------- --- Mon 5 Mar 2012 Day 65 --- 22 34 50 J1300+141A 17 35 54 25.3 271.8 4.6 62.0 35 867 22 34 50 22 36 20 =1257+145 17 37 25 25.0 272.0 4.6 62.0 90 879 22 34 51 22 36 20 1257+12 17 37 25 24.2 270.5 4.6 61.3 -5 879 No stop 22 39 40 --- 17 40 45 23.5 270.9 4.7 61.3 195 904 22 36 21 22 39 40 J1300+141A 17 40 45 24.3 272.4 4.7 62.0 -5 904 No stop 22 41 10 =1257+145 17 42 16 24.0 272.6 4.7 61.9 85 916 22 39 41 22 41 10 1257+12 17 42 16 23.2 271.1 4.7 61.3 -5 916 No stop 22 44 30 --- 17 45 36 22.4 271.5 4.7 61.3 195 942 22 41 11 22 45 10 J1300+141A 17 46 16 23.1 273.1 4.8 61.9 35 942 22 45 10 22 46 40 =1257+145 17 47 46 22.8 273.3 4.8 61.9 90 953 22 45 11 22 46 40 1257+12 17 47 46 22.0 271.8 4.8 61.3 -5 953 No stop 22 50 00 --- 17 51 07 21.3 272.2 4.8 61.3 195 979 22 46 41 22 50 00 J1300+141A 17 51 07 22.1 273.7 4.8 61.8 -5 979 No stop 22 51 30 =1257+145 17 52 37 21.8 273.9 4.9 61.8 85 991 22 50 01 22 51 30 1257+12 17 52 37 20.9 272.4 4.9 61.2 -5 991 No stop 22 54 50 --- 17 55 58 20.2 272.8 4.9 61.2 195 1017 22 51 31 22 55 30 J1300+141A 17 56 38 20.9 274.4 4.9 61.7 35 1017 22 55 30 22 57 00 =1257+145 17 58 08 20.6 274.6 5.0 61.7 90 1028 22 55 31 22 57 00 1257+12 17 58 08 19.8 273.1 5.0 61.2 -5 1028 No stop 23 00 20 --- 18 01 29 19.0 273.5 5.0 61.1 195 1054 22 57 01 23 00 20 J1300+141A 18 01 29 19.9 275.0 5.0 61.6 -5 1054 No stop 23 01 50 =1257+145 18 02 59 19.6 275.2 5.0 61.6 85 1066 23 00 21 23 01 50 1257+12 18 02 59 18.7 273.7 5.0 61.1 -5 1066 No stop 23 05 10 --- 18 06 19 18.0 274.1 5.1 61.1 195 1092 23 01 51 23 05 50 J1300+141A 18 07 00 18.7 275.7 5.1 61.5 35 1092 23 05 50 23 07 20 =1257+145 18 08 30 18.4 275.8 5.1 61.5 90 1103 23 05 51 23 07 20 1257+12 18 08 30 17.5 274.4 5.1 61.0 -5 1103 No stop 23 10 40 --- 18 11 50 16.8 274.8 5.2 61.0 195 1129 23 07 21 23 10 40 J1300+141A 18 11 50 17.7 276.3 5.2 61.4 -5 1129 No stop 23 12 10 =1257+145 18 13 21 17.3 276.4 5.2 61.4 85 1141 23 10 41 Schedule for SHANGHAI (Code Sh ) Page 6 PSR B1257+12 planetary system studies with EVN 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 ---------------------------------------------------------------------------------------- --- Mon 5 Mar 2012 Day 65 --- 23 12 10 1257+12 18 13 21 16.5 275.0 5.2 60.9 -5 1141 No stop 23 15 30 --- 18 16 41 15.8 275.4 5.3 60.9 195 1166 23 12 11 23 16 10 J1300+141A 18 17 21 16.5 276.9 5.3 61.3 35 1166 23 16 10 23 18 10 =1257+145 18 19 22 16.1 277.2 5.3 61.2 120 1182 23 16 11 23 21 30 J1310+3220 18 22 42 25.3 293.9 5.2 67.8 179 1182 23 21 30 23 29 05 =1308+326 18 30 18 23.8 294.5 5.3 67.1 455 1241 23 21 31 23 32 25 J1300+141A 18 33 39 13.0 278.9 5.5 60.8 179 1241 23 32 25 23 34 25 =1257+145 18 35 39 12.6 279.1 5.6 60.7 120 1256 23 32 26 23 34 25 1257+12 18 35 39 11.8 277.7 5.6 60.4 -6 1256 No stop 23 44 25 --- 18 45 41 9.6 279.0 5.7 60.1 594 1333 23 34 26 23 45 05 J1300+141A 18 46 21 10.4 280.4 5.8 60.3 35 1333 23 45 05 23 46 35 =1257+145 18 47 51 10.0 280.6 5.8 60.2 90 1345 23 45 06 23 46 35 1257+12 18 47 51 9.2 279.3 5.8 60.0 -6 1345 No stop 23 49 55 --- 18 51 12 8.5 279.7 5.8 59.9 194 1371 23 46 36 23 50 35 J1300+141A 18 51 52 9.2 281.1 5.8 60.1 35 1371 23 50 35 23 52 05 =1257+145 18 53 22 8.9 281.3 5.9 60.0 90 1382 23 50 36 23 52 05 1257+12 18 53 22 8.0 279.9 5.9 59.8 -6 1382 No stop 23 55 25 --- 18 56 43 7.3 280.4 5.9 59.7 194 1408 23 52 06 23 55 25 J1300+141A 18 56 43 8.2 281.7 5.9 59.9 -6 1408 No stop 23 56 55 =1257+145 18 58 13 7.9 281.9 6.0 59.8 84 1420 23 55 26 --- Start: Mon 5 Mar 2012 Day 65 -- Stop: Tue 6 Mar 2012 Day 66 --- 23 56 55 1257+12 18 58 13 7.0 280.5 6.0 59.6 -6 1420 No stop 00 00 15 --- 19 01 34 6.3 281.0 6.0 59.5 194 1446 23 56 56 00 00 55 J1300+141A 19 02 14 7.0 282.4 6.0 59.6 34 1446 00 00 55 00 02 25 =1257+145 19 03 44 6.7 282.6 6.0 59.6 90 1457 00 00 56 00 02 25 1257+12 19 03 44 5.8 281.2 6.1 59.4 -6 1457 No stop 00 05 45 --- 19 07 04 5.1 281.6 6.1 59.2 194 1483 00 02 26 00 05 45 J1300+141A 19 07 04 6.0 283.0 6.1 59.4 -6 1483 No stop 00 07 15 =1257+145 19 08 35 5.7 283.2 6.1 59.3 84 1495 00 05 46 Schedule for SHANGHAI (Code Sh ) Page 7 PSR B1257+12 planetary system studies with EVN 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 ---------------------------------------------------------------------------------------- --- Tue 6 Mar 2012 Day 66 --- 02 22 00 J1522+3144 21 23 42 15.6 298.0 6.0 62.7 8020 1495 02 22 00 02 30 00 =1520+319 21 31 43 14.0 298.8 6.2 61.9 480 1557 02 22 01 SETUP FILE INFORMATION: NOTE: If DOPPLER, FREQ, or BW were used, see the individual scans for the final BBC settings. Setup file: sess112.L1024 Matching groups in /psr/soft/sched9.4/catalogs/freq.dat: sh18cm Huang Xinyong 27Sept05 ****** Only 244.98 of 256.00 MHz total bandwidth is within the IFs in the setup file before any FREQ or DOPPLER shifts. Setup group: 6 Station: SHANGHAI Total bit rate: 1024 Format: MKIV1:2 Bits per sample: 2 Sample rate: 32.000 Number of channels: 16 DBE type: Speedup factor: 0.50 Disk used to record data. 1st LO= 2300.00 2300.00 2300.00 2300.00 2300.00 2300.00 2300.00 2300.00 2300.00 2300.00 2300.00 2300.00 2300.00 2300.00 2300.00 2300.00 Net SB= L L U U L L U U L L U U L L U U Pol. = RCP LCP RCP LCP RCP LCP RCP LCP RCP LCP RCP LCP RCP LCP RCP LCP BBC = 1 2 1 2 3 4 3 4 5 6 5 6 7 8 7 8 BBC SB= U U L L U U L L U U L L U U L L IF = C A C A C A C A C A C A C A C A The following frequency sets based on this setup were used. Frequency Set: 10 Setup file default. Used pcal sets: 1 LO sum= 1610.49 1610.49 1610.49 1610.49 1642.49 1642.49 1642.49 1642.49 1674.49 1674.49 1674.49 1674.49 1706.49 1706.49 1706.49 1706.49 BBC fr= 689.51 689.51 689.51 689.51 657.51 657.51 657.51 657.51 625.51 625.51 625.51 625.51 593.51 593.51 593.51 593.51 Bandwd= 16.000 16.000 16.000 16.000 16.000 16.000 16.000 16.000 16.000 16.000 16.000 16.000 16.000 16.000 16.000 16.000 The following pulse cal sets were used with this setup: Pulse cal detection set: 1 PCAL = 1MHZ PCALXB1= S1 S3 S5 S7 S9 S11 S13 S15 PCALXB2= S2 S4 S6 S8 S10 S12 S14 S16 PCALFR1= 490 510 490 510 490 510 490 510 PCALFR2= 490 510 490 510 490 510 490 510 Track assignments are: track1= 2, 10, 18, 26, 3, 11, 19, 27, 66, 74, 82, 90, 67, 75, 83, 91 barrel=roll_off SOURCES USED IN RECORDING SCANS -- PSR B1257+12 planetary system studies with EVN 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) * 1257+12 12 57 33.179926 * 13 00 03.089483 13 00 41.678758 0.00 B1257+12 12 57 04.86453 * 12 40 55.64224 12 36 44.17744 0.00 From catalog imbedded in main SCHED input file. 3.444 scan and 185.850 baseline hours in setup: sess112.L1024 * J0927+3902 09 23 55.319213 * 09 27 03.013934 09 27 51.285765 0.29 0923+392 39 15 23.56646 * 39 02 20.85186 38 59 00.17204 0.16 4C39.25 From catalog imbedded in main SCHED input file. J0927+39 GSFC 2010a astro solution 231732 Observations 0.133 scan and 7.333 baseline hours in setup: sess112.L1024 * J1300+141A 12 57 51.534337 * 13 00 20.918821 13 00 59.375298 0.05 J1300+1417 14 33 27.40940 * 14 17 18.53162 14 13 06.92865 0.07 1257+145 From catalog imbedded in main SCHED input file. J1300+14 GSFC 2010a astro solution 713 Observations 1.536 scan and 76.872 baseline hours in setup: sess112.L1024 * J1310+3220 13 08 07.560130 * 13 10 28.663849 13 11 05.082168 0.22 1308+326 32 36 40.23886 * 32 20 43.78293 32 16 33.13971 0.20 J1310+32 From catalog imbedded in main SCHED input file. GSFC 2010a astro solution 113439 Observations 0.126 scan and 8.342 baseline hours in setup: sess112.L1024 * J1522+3144 15 20 08.107590 * 15 22 09.991733 15 22 41.011883 0.02 1520+319 31 54 54.51271 * 31 44 14.38197 31 41 21.20813 0.02 J1522+31 From catalog imbedded in main SCHED input file. GSFC 2010a astro solution 2331 Observations 0.133 scan and 8.800 baseline hours in setup: sess112.L1024 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) 1257+12 151.3 J0927+3902 139.7 J1300+141A 150.8 J1310+3220 140.8 J1522+3144 115.2 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