COVER INFORMATION Station: MEDICINA (Code Mc ) Experiment: 11th epoch of obs. of SN1979C in M100: VLBA/MkIV 6cm pol. Exp. Code: GB072 Schedule Version: 1.00 Processed by SCHED version: 10.00 Release Sept. 15, 2011 PI: Norbert Bartel Address: York University Toronto, ON M3J 1P3 Canada Phone: +1-416-736-5424 (work) EMAIL: bartel@yorku.ca Fax: +1-416-736-5516 Phone during observation: +1-416-483-9068 (home) Observing mode: VLBA 512-16-2-ul 6cm Notes: Fringe finder : OQ208, OJ287, 3C273 Pol. Calibrator: OQ208, OJ287 Amplitude check: OQ208, OJ287 Schedule for MEDICINA (Code Mc ) Page 2 11th epoch of obs. of SN1979C in M100: VLBA/MkIV 6cm pol. 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 25 Oct 2011 Day 298 --- Next scan frequencies: 4942.49 4942.49 4942.49 4942.49 4974.49 4974.49 4974.49 4974.49 5006.49 5006.49 5006.49 5006.49 5038.49 5038.49 5038.49 5038.49 Next BBC frequencies: 342.49 342.49 342.49 342.49 374.49 374.49 374.49 374.49 406.49 406.49 406.49 406.49 438.49 438.49 438.49 438.49 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 08 35 00 OJ287 11 35 09 49.0 606.6 2.7 44.2 0 0 08 34 55 08 38 00 --- 11 38 09 48.5 607.4 2.7 44.5 180 24 08 34 58 08 43 00 J1215+17 11 43 10 61.5 523.5 -0.5 -12.2 182 24 08 42 55 08 45 00 --- 11 45 10 61.6 524.5 -0.5 -11.5 120 40 08 42 58 08 45 00 SN1979C 11 45 10 60.1 521.2 -0.6 -13.8 -8 40 No stop 08 48 20 --- 11 48 31 60.3 522.8 -0.6 -12.7 192 66 08 45 03 08 49 10 J1215+17 11 49 21 61.8 526.6 -0.4 -9.9 42 66 08 49 05 08 50 20 --- 11 50 31 61.8 527.2 -0.4 -9.5 70 75 08 49 08 08 50 20 SN1979C 11 50 31 60.4 523.7 -0.6 -12.0 -8 75 No stop 08 53 40 --- 11 53 52 60.5 525.3 -0.5 -10.8 192 101 08 50 23 08 53 40 J1215+17 11 53 52 61.9 528.9 -0.4 -8.3 -9 101 No stop 08 55 00 --- 11 55 12 62.0 529.5 -0.3 -7.8 71 112 08 53 43 08 55 00 SN1979C 11 55 12 60.6 526.0 -0.5 -10.3 -9 112 No stop 08 58 20 --- 11 58 32 60.7 527.6 -0.4 -9.1 191 137 08 55 03 08 59 10 J1215+17 11 59 23 62.1 531.6 -0.3 -6.2 41 137 08 59 05 09 00 20 --- 12 00 33 62.1 532.2 -0.3 -5.8 70 147 08 59 08 09 00 20 SN1979C 12 00 33 60.8 528.6 -0.4 -8.4 -9 147 No stop 09 03 40 --- 12 03 53 60.9 530.2 -0.3 -7.2 191 173 09 00 23 09 03 40 J1215+17 12 03 53 62.2 533.9 -0.2 -4.5 -9 173 No stop 09 05 00 --- 12 05 13 62.2 534.6 -0.2 -4.0 71 183 09 03 43 09 05 00 SN1979C 12 05 13 61.0 530.9 -0.3 -6.7 -9 183 No stop 09 08 20 --- 12 08 34 61.0 532.5 -0.3 -5.5 191 209 09 05 03 Schedule for MEDICINA (Code Mc ) Page 3 11th epoch of obs. of SN1979C in M100: VLBA/MkIV 6cm pol. 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 25 Oct 2011 Day 298 --- 09 09 10 J1215+17 12 09 24 62.3 536.8 -0.1 -2.4 41 209 09 09 05 09 10 20 --- 12 10 34 62.3 537.4 -0.1 -2.0 70 219 09 09 08 09 10 20 SN1979C 12 10 34 61.1 533.5 -0.2 -4.8 -9 219 No stop 09 13 40 --- 12 13 55 61.1 535.2 -0.2 -3.6 191 245 09 10 23 09 13 40 J1215+17 12 13 55 62.3 539.1 0.0 -0.7 -9 245 No stop 09 15 00 --- 12 15 15 62.3 539.8 0.0 -0.2 71 255 09 13 43 09 15 00 SN1979C 12 15 15 61.2 535.8 -0.1 -3.1 -9 255 No stop 09 18 20 --- 12 18 36 61.2 537.5 -0.1 -1.8 191 281 09 15 03 09 19 10 J1215+17 12 19 26 62.3 541.9 0.1 1.4 41 281 09 19 05 09 20 20 --- 12 20 36 62.3 542.5 0.1 1.9 70 290 09 19 08 09 20 20 SN1979C 12 20 36 61.2 538.5 0.0 -1.1 -9 290 No stop 09 23 40 --- 12 23 57 61.2 540.2 0.0 0.1 191 316 09 20 23 09 23 40 J1215+17 12 23 57 62.3 544.3 0.1 3.2 -9 316 No stop 09 25 00 --- 12 25 17 62.2 544.9 0.2 3.7 71 326 09 23 43 09 25 00 SN1979C 12 25 17 61.2 540.9 0.0 0.6 -9 326 No stop 09 28 20 --- 12 28 37 61.2 542.5 0.1 1.9 191 352 09 25 03 09 29 10 J1215+17 12 29 27 62.2 547.1 0.2 5.3 40 352 09 29 05 09 30 20 --- 12 30 38 62.1 547.7 0.2 5.7 70 362 09 29 08 09 30 20 SN1979C 12 30 38 61.2 543.5 0.1 2.6 -9 362 No stop 09 33 40 --- 12 33 58 61.1 545.2 0.2 3.8 191 388 09 30 23 09 33 40 J1215+17 12 33 58 62.1 549.4 0.3 7.0 -10 388 No stop 09 35 00 --- 12 35 18 62.0 550.1 0.3 7.5 70 398 09 33 43 09 35 00 SN1979C 12 35 18 61.1 545.9 0.2 4.3 -9 398 No stop 09 38 20 --- 12 38 39 61.0 547.5 0.3 5.6 191 424 09 35 03 09 39 10 J1215+17 12 39 29 61.9 552.2 0.4 9.0 40 424 09 39 05 09 40 20 --- 12 40 39 61.8 552.7 0.4 9.5 70 434 09 39 08 09 40 20 SN1979C 12 40 39 61.0 548.5 0.3 6.3 -10 434 No stop 09 43 40 --- 12 44 00 60.9 550.1 0.3 7.5 190 459 09 40 23 09 43 40 J1215+17 12 44 00 61.7 554.4 0.5 10.7 -10 459 No stop 09 45 00 --- 12 45 20 61.6 555.1 0.5 11.2 70 470 09 43 43 Schedule for MEDICINA (Code Mc ) Page 4 11th epoch of obs. of SN1979C in M100: VLBA/MkIV 6cm pol. 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 25 Oct 2011 Day 298 --- 09 45 00 SN1979C 12 45 20 60.8 550.8 0.4 8.0 -10 470 No stop 09 48 20 --- 12 48 41 60.7 552.4 0.4 9.2 190 495 09 45 03 09 49 10 J1215+17 12 49 31 61.4 557.1 0.6 12.7 40 495 09 49 05 09 50 20 --- 12 50 41 61.4 557.7 0.6 13.1 70 505 09 49 08 09 50 20 SN1979C 12 50 41 60.6 553.4 0.5 9.9 -10 505 No stop 09 53 40 --- 12 54 01 60.5 555.0 0.5 11.1 190 531 09 50 23 09 53 40 J1215+17 12 54 01 61.2 559.3 0.6 14.3 -10 531 No stop 09 55 00 --- 12 55 22 61.1 560.0 0.7 14.7 70 541 09 53 43 09 55 00 SN1979C 12 55 22 60.4 555.6 0.5 11.5 -10 541 No stop 09 58 20 --- 12 58 42 60.3 557.2 0.6 12.7 190 567 09 55 03 09 59 10 J1215+17 12 59 32 60.8 561.9 0.7 16.2 40 567 09 59 05 10 00 20 --- 13 00 43 60.7 562.5 0.8 16.6 70 577 09 59 08 10 00 20 SN1979C 13 00 43 60.2 558.2 0.6 13.4 -10 577 No stop 10 03 40 --- 13 04 03 60.0 559.7 0.7 14.5 190 603 10 00 23 10 03 40 J1215+17 13 04 03 60.5 564.0 0.8 17.7 -10 603 No stop 10 05 00 --- 13 05 23 60.4 564.7 0.8 18.1 70 613 10 03 43 10 05 00 SN1979C 13 05 23 59.9 560.4 0.7 14.9 -10 613 No stop 10 08 20 --- 13 08 44 59.7 561.9 0.8 16.0 190 639 10 05 03 10 09 10 J1215+17 13 09 34 60.1 566.6 0.9 19.5 40 639 10 09 05 10 10 20 --- 13 10 44 60.0 567.1 0.9 19.8 70 648 10 09 08 10 10 20 SN1979C 13 10 44 59.5 562.8 0.8 16.7 -10 648 No stop 10 13 40 --- 13 14 05 59.3 564.3 0.8 17.8 190 674 10 10 23 10 13 40 J1215+17 13 14 05 59.7 568.6 1.0 20.9 -10 674 No stop 10 15 00 --- 13 15 25 59.6 569.2 1.0 21.3 70 684 10 13 43 10 15 00 SN1979C 13 15 25 59.2 564.9 0.9 18.2 -10 684 No stop 10 18 20 --- 13 18 46 58.9 566.4 0.9 19.2 190 710 10 15 03 10 19 10 J1215+17 13 19 36 59.2 571.0 1.1 22.6 40 710 10 19 05 10 20 20 --- 13 20 46 59.1 571.5 1.1 22.9 70 720 10 19 08 10 20 20 SN1979C 13 20 46 58.8 567.3 1.0 19.9 -9 720 No stop 10 23 40 --- 13 24 06 58.5 568.7 1.0 20.9 191 746 10 20 23 Schedule for MEDICINA (Code Mc ) Page 5 11th epoch of obs. of SN1979C in M100: VLBA/MkIV 6cm pol. 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 25 Oct 2011 Day 298 --- 10 23 40 J1215+17 13 24 06 58.8 572.9 1.1 23.9 -10 746 No stop 10 25 00 --- 13 25 27 58.7 573.5 1.2 24.3 70 756 10 23 43 10 25 00 SN1979C 13 25 27 58.4 569.3 1.0 21.3 -9 756 No stop 10 28 20 --- 13 28 47 58.1 570.7 1.1 22.2 191 782 10 25 03 10 29 10 J1215+17 13 29 37 58.3 575.2 1.2 25.4 40 782 10 29 05 10 30 20 --- 13 30 47 58.1 575.7 1.3 25.8 70 792 10 29 08 10 30 20 SN1979C 13 30 47 57.9 571.6 1.1 22.8 -9 792 No stop 10 33 40 --- 13 34 08 57.6 573.0 1.2 23.8 191 817 10 30 23 10 33 40 J1215+17 13 34 08 57.8 577.1 1.3 26.7 -9 817 No stop 10 35 00 --- 13 35 28 57.6 577.6 1.3 27.0 71 828 10 33 43 10 35 00 SN1979C 13 35 28 57.4 573.5 1.2 24.1 -9 828 No stop 10 38 20 --- 13 38 49 57.1 574.9 1.3 25.0 191 853 10 35 03 10 39 10 J1215+17 13 39 39 57.2 579.2 1.4 28.1 41 853 10 39 05 10 40 20 --- 13 40 49 57.0 579.7 1.4 28.4 70 863 10 39 08 10 40 20 SN1979C 13 40 49 56.9 575.7 1.3 25.6 -9 863 No stop 10 43 40 --- 13 44 10 56.6 577.0 1.3 26.5 191 889 10 40 23 10 43 40 J1215+17 13 44 10 56.7 581.0 1.5 29.2 -9 889 No stop 10 45 00 --- 13 45 30 56.5 581.5 1.5 29.6 71 899 10 43 43 10 45 00 SN1979C 13 45 30 56.4 577.5 1.4 26.8 -9 899 No stop 10 48 20 --- 13 48 50 56.0 578.8 1.4 27.6 191 925 10 45 03 10 49 10 J1215+17 13 49 41 56.0 583.0 1.6 30.6 41 925 10 49 05 10 50 20 --- 13 50 51 55.9 583.5 1.6 30.8 70 935 10 49 08 10 50 20 SN1979C 13 50 51 55.8 579.5 1.5 28.1 -9 935 No stop 10 53 40 --- 13 54 11 55.4 580.8 1.5 28.9 191 961 10 50 23 10 53 40 J1215+17 13 54 11 55.4 584.7 1.6 31.6 -9 961 No stop 10 55 00 --- 13 55 32 55.3 585.2 1.7 31.9 71 971 10 53 43 10 55 00 SN1979C 13 55 32 55.3 581.3 1.5 29.3 -9 971 No stop 10 58 20 --- 13 58 52 54.9 582.5 1.6 30.0 191 997 10 55 03 10 59 10 J1215+17 13 59 42 54.7 586.6 1.7 32.8 41 997 10 59 05 11 00 20 --- 14 00 52 54.6 587.0 1.8 33.0 70 1006 10 59 08 Schedule for MEDICINA (Code Mc ) Page 6 11th epoch of obs. of SN1979C in M100: VLBA/MkIV 6cm pol. 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 25 Oct 2011 Day 298 --- 11 00 20 SN1979C 14 00 52 54.6 583.2 1.6 30.5 -9 1006 No stop 11 03 40 --- 14 04 13 54.2 584.4 1.7 31.2 191 1032 11 00 23 11 03 40 J1215+17 14 04 13 54.1 588.2 1.8 33.7 -9 1032 No stop 11 05 00 --- 14 05 33 54.0 588.6 1.8 34.0 71 1043 11 03 43 11 05 00 SN1979C 14 05 33 54.1 584.9 1.7 31.5 -9 1043 No stop 11 08 20 --- 14 08 54 53.6 586.1 1.8 32.2 191 1068 11 05 03 11 09 10 J1215+17 14 09 44 53.4 590.0 1.9 34.8 41 1068 11 09 05 11 10 20 --- 14 10 54 53.2 590.4 1.9 35.0 70 1078 11 09 08 11 10 20 SN1979C 14 10 54 53.4 586.7 1.8 32.6 -9 1078 No stop 11 13 40 --- 14 14 15 52.9 587.9 1.8 33.3 191 1104 11 10 23 11 13 40 J1215+17 14 14 15 52.8 591.5 2.0 35.7 -9 1104 No stop 11 15 00 --- 14 15 35 52.6 591.9 2.0 35.9 71 1114 11 13 43 11 15 00 SN1979C 14 15 35 52.8 588.3 1.9 33.6 -9 1114 No stop 11 18 20 --- 14 18 55 52.3 589.4 1.9 34.2 191 1140 11 15 03 11 19 10 J1215+17 14 19 46 52.0 593.2 2.1 36.6 41 1140 11 19 05 11 20 20 --- 14 20 56 51.8 593.6 2.1 36.8 70 1150 11 19 08 11 20 20 SN1979C 14 20 56 52.0 590.1 2.0 34.6 -9 1150 No stop 11 23 40 --- 14 24 16 51.6 591.1 2.0 35.2 191 1175 11 20 23 11 23 40 J1215+17 14 24 16 51.3 594.6 2.1 37.4 -9 1175 No stop 11 25 00 --- 14 25 36 51.2 595.0 2.2 37.6 71 1186 11 23 43 11 25 00 SN1979C 14 25 36 51.4 591.5 2.0 35.5 -9 1186 No stop 11 28 20 --- 14 28 57 50.9 592.6 2.1 36.0 191 1212 11 25 03 11 29 10 J1215+17 14 29 47 50.5 596.3 2.2 38.3 41 1212 11 29 05 11 30 20 --- 14 30 57 50.4 596.6 2.3 38.5 70 1221 11 29 08 11 30 20 SN1979C 14 30 57 50.6 593.2 2.1 36.4 -8 1221 No stop 11 33 40 --- 14 34 18 50.2 594.2 2.2 36.9 192 1247 11 30 23 11 33 40 J1215+17 14 34 18 49.9 597.6 2.3 39.0 -8 1247 No stop 11 35 00 --- 14 35 38 49.7 598.0 2.3 39.2 72 1257 11 33 43 11 35 00 SN1979C 14 35 38 50.0 594.6 2.2 37.1 -8 1257 No stop 11 38 20 --- 14 38 59 49.5 595.6 2.3 37.7 192 1283 11 35 03 Schedule for MEDICINA (Code Mc ) Page 7 11th epoch of obs. of SN1979C in M100: VLBA/MkIV 6cm pol. 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 25 Oct 2011 Day 298 --- 11 39 10 J1215+17 14 39 49 49.0 599.2 2.4 39.8 42 1283 11 39 05 11 40 20 --- 14 40 59 48.8 599.5 2.4 39.9 70 1293 11 39 08 11 40 20 SN1979C 14 40 59 49.2 596.2 2.3 38.0 -8 1293 No stop 11 43 40 --- 14 44 20 48.7 597.1 2.3 38.5 192 1319 11 40 23 11 43 40 J1215+17 14 44 20 48.3 600.4 2.5 40.4 -8 1319 No stop 11 45 00 --- 14 45 40 48.1 600.8 2.5 40.6 72 1329 11 43 43 11 45 00 SN1979C 14 45 40 48.5 597.5 2.4 38.7 -8 1329 No stop 11 48 20 --- 14 49 00 48.0 598.5 2.4 39.1 192 1355 11 45 03 11 49 10 J1215+17 14 49 50 47.5 601.9 2.6 41.1 42 1355 11 49 05 11 50 20 --- 14 51 01 47.3 602.2 2.6 41.2 70 1364 11 49 08 11 50 20 SN1979C 14 51 01 47.7 599.0 2.5 39.4 -8 1364 No stop 11 53 40 --- 14 54 21 47.2 599.9 2.5 39.9 192 1390 11 50 23 11 53 40 J1215+17 14 54 21 46.8 603.1 2.6 41.6 -8 1390 No stop 11 55 00 --- 14 55 41 46.5 603.5 2.7 41.8 72 1401 11 53 43 11 55 00 SN1979C 14 55 41 46.9 600.3 2.5 40.0 -8 1401 No stop 11 58 20 --- 14 59 02 46.4 601.2 2.6 40.5 192 1426 11 55 03 11 59 10 J1215+17 14 59 52 45.9 604.5 2.7 42.3 42 1426 11 59 05 12 00 20 --- 15 01 02 45.7 604.8 2.8 42.4 70 1436 11 59 08 12 00 20 SN1979C 15 01 02 46.1 601.7 2.6 40.7 -8 1436 No stop 12 03 40 --- 15 04 23 45.6 602.6 2.7 41.1 192 1462 12 00 23 12 03 40 J1215+17 15 04 23 45.1 605.7 2.8 42.7 -8 1462 No stop 12 05 00 --- 15 05 43 44.9 606.0 2.8 42.9 72 1472 12 03 43 12 05 00 SN1979C 15 05 43 45.4 602.9 2.7 41.3 -8 1472 No stop 12 08 20 --- 15 09 04 44.8 603.8 2.8 41.7 192 1498 12 05 03 12 09 10 J1215+17 15 09 54 44.2 607.0 2.9 43.3 42 1498 12 09 05 12 10 20 --- 15 11 04 44.1 607.3 2.9 43.4 70 1508 12 09 08 12 10 20 SN1979C 15 11 04 44.5 604.3 2.8 41.9 -8 1508 No stop 12 13 40 --- 15 14 24 44.0 605.1 2.8 42.2 192 1533 12 10 23 12 13 40 J1215+17 15 14 24 43.5 608.1 3.0 43.7 -8 1533 No stop 12 15 00 --- 15 15 45 43.3 608.4 3.0 43.8 72 1544 12 13 43 Schedule for MEDICINA (Code Mc ) Page 8 11th epoch of obs. of SN1979C in M100: VLBA/MkIV 6cm pol. 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 25 Oct 2011 Day 298 --- 12 15 00 SN1979C 15 15 45 43.8 605.5 2.9 42.4 -8 1544 No stop 12 18 20 --- 15 19 05 43.2 606.3 2.9 42.7 192 1570 12 15 03 12 19 10 J1215+17 15 19 55 42.6 609.4 3.1 44.2 42 1570 12 19 05 12 20 20 --- 15 21 06 42.4 609.7 3.1 44.3 70 1579 12 19 08 12 20 20 SN1979C 15 21 06 42.9 606.8 3.0 42.9 -8 1579 No stop 12 23 40 --- 15 24 26 42.3 607.6 3.0 43.2 192 1605 12 20 23 12 23 40 J1215+17 15 24 26 41.8 610.4 3.1 44.6 -8 1605 No stop 12 25 00 --- 15 25 46 41.6 610.8 3.2 44.7 72 1615 12 23 43 12 25 00 SN1979C 15 25 46 42.1 607.9 3.0 43.3 -8 1615 No stop 12 28 20 --- 15 29 07 41.6 608.7 3.1 43.6 192 1641 12 25 03 12 29 10 J1215+17 15 29 57 40.9 611.7 3.2 45.0 42 1641 12 29 05 12 30 20 --- 15 31 07 40.7 612.0 3.3 45.1 70 1651 12 29 08 12 30 20 SN1979C 15 31 07 41.2 609.1 3.1 43.8 -8 1651 No stop 12 33 40 --- 15 34 28 40.7 609.9 3.2 44.1 192 1677 12 30 23 12 33 40 J1215+17 15 34 28 40.1 612.7 3.3 45.3 -8 1677 No stop 12 35 00 --- 15 35 48 39.9 613.0 3.3 45.4 72 1687 12 33 43 12 35 00 SN1979C 15 35 48 40.5 610.2 3.2 44.2 -8 1687 No stop 12 38 20 --- 15 39 09 39.9 611.0 3.3 44.4 192 1713 12 35 03 12 39 10 J1215+17 15 39 59 39.2 613.9 3.4 45.7 42 1713 12 39 05 12 40 20 --- 15 41 09 39.0 614.1 3.4 45.8 70 1722 12 39 08 12 40 20 SN1979C 15 41 09 39.6 611.4 3.3 44.6 -8 1722 No stop 12 43 40 --- 15 44 29 39.0 612.1 3.3 44.8 192 1748 12 40 23 12 43 40 J1215+17 15 44 29 38.4 614.9 3.5 46.0 -8 1748 No stop 12 45 00 --- 15 45 50 38.2 615.1 3.5 46.1 72 1759 12 43 43 12 45 00 SN1979C 15 45 50 38.8 612.4 3.4 44.9 -8 1759 No stop 12 48 20 --- 15 49 10 38.2 613.2 3.4 45.2 192 1784 12 45 03 12 49 10 J1215+17 15 50 00 37.5 616.0 3.6 46.3 42 1784 12 49 05 12 50 20 --- 15 51 10 37.3 616.3 3.6 46.4 70 1794 12 49 08 12 50 20 SN1979C 15 51 10 37.8 613.6 3.5 45.3 -7 1794 No stop 12 53 40 --- 15 54 31 37.3 614.3 3.5 45.5 193 1820 12 50 23 Schedule for MEDICINA (Code Mc ) Page 9 11th epoch of obs. of SN1979C in M100: VLBA/MkIV 6cm pol. 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 25 Oct 2011 Day 298 --- 12 53 40 J1215+17 15 54 31 36.7 617.0 3.6 46.5 -7 1820 No stop 12 55 00 --- 15 55 51 36.5 617.2 3.7 46.6 73 1830 12 53 43 12 55 00 SN1979C 15 55 51 37.0 614.6 3.5 45.6 -7 1830 No stop 12 58 20 --- 15 59 12 36.5 615.3 3.6 45.8 193 1856 12 55 03 12 59 10 J1215+17 16 00 02 35.7 618.1 3.7 46.8 43 1856 12 59 05 13 00 20 --- 16 01 12 35.5 618.3 3.8 46.8 70 1866 12 59 08 13 00 20 SN1979C 16 01 12 36.1 615.7 3.6 45.9 -7 1866 No stop 13 03 40 --- 16 04 33 35.5 616.4 3.7 46.1 193 1891 13 00 23 13 03 40 J1215+17 16 04 33 34.9 619.0 3.8 47.0 -7 1891 No stop 13 05 00 --- 16 05 53 34.7 619.2 3.8 47.0 73 1902 13 03 43 13 05 00 SN1979C 16 05 53 35.3 616.7 3.7 46.1 -7 1902 No stop 13 08 20 --- 16 09 13 34.7 617.3 3.8 46.3 193 1928 13 05 03 13 09 10 J1215+17 16 10 04 34.0 620.1 3.9 47.2 43 1928 13 09 05 13 10 20 --- 16 11 14 33.8 620.3 3.9 47.2 70 1937 13 09 08 13 10 20 SN1979C 16 11 14 34.4 617.8 3.8 46.4 -7 1937 No stop 13 13 40 --- 16 14 34 33.8 618.4 3.9 46.5 193 1963 13 10 23 13 13 40 J1215+17 16 14 34 33.2 620.9 4.0 47.4 -7 1963 No stop 13 15 00 --- 16 15 55 32.9 621.2 4.0 47.4 73 1973 13 13 43 13 15 00 SN1979C 16 15 55 33.6 618.7 3.9 46.6 -7 1973 No stop 13 17 50 --- 16 18 45 33.1 619.2 3.9 46.7 163 1995 13 15 03 13 18 40 J1215+17 16 19 35 32.3 621.9 4.1 47.5 43 1995 13 18 35 13 20 30 --- 16 21 25 32.0 622.3 4.1 47.6 110 2010 13 18 38 13 20 30 SN1979C 16 21 25 32.6 619.8 4.0 46.8 -7 2010 No stop 13 23 10 --- 16 24 06 32.1 620.3 4.0 46.9 153 2031 13 20 33 13 23 10 J1215+17 16 24 06 31.5 622.8 4.1 47.6 -7 2031 No stop 13 25 00 --- 16 25 56 31.2 623.1 4.2 47.7 103 2045 13 23 13 13 25 00 SN1979C 16 25 56 31.8 620.6 4.0 47.0 -7 2045 No stop 13 27 50 --- 16 28 47 31.3 621.2 4.1 47.1 163 2067 13 25 03 13 28 40 J1215+17 16 29 37 30.5 623.8 4.2 47.8 43 2067 13 28 35 13 30 30 --- 16 31 27 30.2 624.1 4.3 47.8 110 2082 13 28 38 Schedule for MEDICINA (Code Mc ) Page 10 11th epoch of obs. of SN1979C in M100: VLBA/MkIV 6cm pol. 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 25 Oct 2011 Day 298 --- 13 30 30 SN1979C 16 31 27 30.8 621.7 4.1 47.1 -7 2082 No stop 13 33 10 --- 16 34 08 30.4 622.2 4.2 47.2 153 2102 13 30 33 13 33 10 J1215+17 16 34 08 29.7 624.6 4.3 47.9 -7 2102 No stop 13 35 00 --- 16 35 58 29.4 625.0 4.3 47.9 103 2117 13 33 13 13 35 00 SN1979C 16 35 58 30.0 622.6 4.2 47.3 -7 2117 No stop 13 37 50 --- 16 38 48 29.5 623.1 4.3 47.3 163 2139 13 35 03 13 38 40 J1215+17 16 39 38 28.7 625.7 4.4 48.0 43 2139 13 38 35 13 40 30 --- 16 41 29 28.4 626.0 4.4 48.0 110 2153 13 38 38 13 40 30 SN1979C 16 41 29 29.1 623.6 4.3 47.4 -7 2153 No stop 13 43 10 --- 16 44 09 28.6 624.1 4.3 47.5 153 2174 13 40 33 13 43 10 J1215+17 16 44 09 27.9 626.5 4.5 48.0 -7 2174 No stop 13 45 00 --- 16 45 59 27.6 626.8 4.5 48.1 103 2188 13 43 13 13 45 00 SN1979C 16 45 59 28.3 624.4 4.4 47.5 -7 2188 No stop 13 47 50 --- 16 48 50 27.8 625.0 4.4 47.6 163 2210 13 45 03 13 48 40 J1215+17 16 49 40 27.0 627.5 4.6 48.1 43 2210 13 48 35 13 50 30 --- 16 51 30 26.6 627.8 4.6 48.1 110 2225 13 48 38 13 50 30 SN1979C 16 51 30 27.3 625.4 4.5 47.6 -7 2225 No stop 13 53 10 --- 16 54 11 26.8 625.9 4.5 47.6 153 2246 13 50 33 13 53 10 J1215+17 16 54 11 26.1 628.3 4.6 48.1 -7 2246 No stop 13 55 00 --- 16 56 01 25.8 628.6 4.7 48.1 103 2260 13 53 13 13 55 00 SN1979C 16 56 01 26.5 626.3 4.5 47.7 -7 2260 No stop 13 57 50 --- 16 58 52 26.0 626.8 4.6 47.7 163 2282 13 55 03 13 58 40 J1215+17 16 59 42 25.2 629.3 4.7 48.2 43 2282 13 58 35 14 00 30 --- 17 01 32 24.8 629.6 4.8 48.2 110 2297 13 58 38 14 00 30 SN1979C 17 01 32 25.5 627.3 4.6 47.7 -7 2297 No stop 14 03 10 --- 17 04 12 25.0 627.7 4.7 47.7 153 2317 14 00 33 14 03 10 J1215+17 17 04 12 24.4 630.0 4.8 48.2 -7 2317 No stop 14 05 00 --- 17 06 03 24.0 630.4 4.8 48.2 103 2331 14 03 13 14 10 10 3C273 17 11 14 15.3 617.4 4.7 44.1 288 2331 14 10 05 14 11 30 --- 17 12 34 15.1 617.6 4.7 44.2 80 2342 14 10 08 Schedule for MEDICINA (Code Mc ) Page 11 11th epoch of obs. of SN1979C in M100: VLBA/MkIV 6cm pol. 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 25 Oct 2011 Day 298 --- 14 11 30 J1215+17 17 12 34 22.9 631.5 4.9 48.1 -22 2342 No stop 14 18 30 --- 17 19 35 21.6 632.7 5.1 48.1 398 2397 14 11 33 14 18 30 SN1979C 17 19 35 22.3 630.5 4.9 47.8 -7 2397 No stop 14 21 40 --- 17 22 45 21.7 631.0 5.0 47.8 183 2421 14 18 33 14 21 40 J1215+17 17 22 45 21.1 633.3 5.1 48.1 -7 2421 No stop 14 25 00 --- 17 26 06 20.5 633.8 5.2 48.0 193 2447 14 21 43 14 25 00 SN1979C 17 26 06 21.1 631.6 5.0 47.8 -7 2447 No stop 14 28 00 --- 17 29 07 20.6 632.1 5.1 47.8 173 2470 14 25 03 14 28 50 J1215+17 17 29 57 19.8 634.5 5.2 48.0 43 2470 14 28 45 14 31 30 --- 17 32 37 19.3 634.9 5.3 47.9 160 2491 14 28 48 14 31 30 SN1979C 17 32 37 20.0 632.7 5.2 47.7 -7 2491 No stop 14 34 30 --- 17 35 38 19.4 633.2 5.2 47.7 173 2515 14 31 33 14 34 30 J1215+17 17 35 38 18.8 635.5 5.3 47.9 -7 2515 No stop 14 37 30 --- 17 38 38 18.2 636.0 5.4 47.8 173 2538 14 34 33 14 37 30 SN1979C 17 38 38 18.9 633.7 5.3 47.7 -7 2538 No stop 14 40 30 --- 17 41 39 18.4 634.3 5.3 47.6 173 2561 14 37 33 14 41 20 J1215+17 17 42 29 17.6 636.6 5.4 47.7 43 2561 14 41 15 14 42 50 --- 17 43 59 17.3 636.9 5.5 47.7 90 2573 14 41 18 14 42 50 SN1979C 17 43 59 17.9 634.7 5.3 47.6 -7 2573 No stop 14 45 40 --- 17 46 49 17.4 635.1 5.4 47.5 163 2595 14 42 53 14 45 40 J1215+17 17 46 49 16.8 637.3 5.5 47.6 -7 2595 No stop 14 47 30 --- 17 48 40 16.5 637.7 5.6 47.6 103 2610 14 45 43 14 47 30 SN1979C 17 48 40 17.1 635.5 5.4 47.5 -7 2610 No stop 14 50 30 --- 17 51 40 16.6 636.0 5.5 47.5 173 2633 14 47 33 14 51 20 J1215+17 17 52 30 15.8 638.3 5.6 47.5 43 2633 14 51 15 14 52 50 --- 17 54 01 15.5 638.6 5.6 47.4 90 2645 14 51 18 14 52 50 SN1979C 17 54 01 16.2 636.4 5.5 47.4 -7 2645 No stop 14 55 40 --- 17 56 51 15.7 636.8 5.6 47.3 163 2667 14 52 53 14 55 40 J1215+17 17 56 51 15.0 639.0 5.7 47.4 -7 2667 No stop 14 57 30 --- 17 58 41 14.7 639.3 5.7 47.3 103 2681 14 55 43 Schedule for MEDICINA (Code Mc ) Page 12 11th epoch of obs. of SN1979C in M100: VLBA/MkIV 6cm pol. 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 25 Oct 2011 Day 298 --- 14 57 30 SN1979C 17 58 41 15.3 637.2 5.6 47.3 -7 2681 No stop 15 00 30 --- 18 01 42 14.8 637.7 5.6 47.2 173 2704 14 57 33 15 01 20 J1215+17 18 02 32 14.0 640.0 5.8 47.2 43 2704 15 01 15 15 02 50 --- 18 04 02 13.8 640.2 5.8 47.1 90 2717 15 01 18 15 02 50 SN1979C 18 04 02 14.4 638.1 5.7 47.2 -7 2717 No stop 15 05 40 --- 18 06 53 13.9 638.5 5.7 47.1 163 2739 15 02 53 15 05 40 J1215+17 18 06 53 13.3 640.7 5.9 47.1 -7 2739 No stop 15 07 30 --- 18 08 43 12.9 641.0 5.9 47.0 103 2753 15 05 43 15 07 30 SN1979C 18 08 43 13.6 638.9 5.8 47.0 -7 2753 No stop 15 10 30 --- 18 11 44 13.0 639.4 5.8 47.0 173 2776 15 07 33 15 11 20 J1215+17 18 12 34 12.3 641.7 5.9 46.9 43 2776 15 11 15 15 12 50 --- 18 14 04 12.0 641.9 6.0 46.8 90 2788 15 11 18 15 12 50 SN1979C 18 14 04 12.6 639.8 5.8 46.9 -7 2788 No stop 15 15 40 --- 18 16 54 12.1 640.2 5.9 46.8 163 2810 15 12 53 15 15 40 J1215+17 18 16 54 11.5 642.4 6.0 46.7 -7 2810 No stop 15 17 30 --- 18 18 45 11.2 642.7 6.1 46.6 103 2824 15 15 43 15 17 30 SN1979C 18 18 45 11.8 640.5 5.9 46.7 -7 2824 No stop 15 20 30 --- 18 21 45 11.3 641.0 6.0 46.6 173 2848 15 17 33 15 21 20 J1215+17 18 22 35 10.5 643.3 6.1 46.5 43 2848 15 21 15 15 22 50 --- 18 24 06 10.3 643.6 6.1 46.4 90 2860 15 21 18 15 22 50 SN1979C 18 24 06 10.9 641.4 6.0 46.6 -7 2860 No stop 15 25 40 --- 18 26 56 10.4 641.9 6.1 46.4 163 2882 15 22 53 15 25 40 J1215+17 18 26 56 9.8 644.1 6.2 46.3 -7 2882 No stop 15 27 30 --- 18 28 46 9.4 644.4 6.2 46.2 103 2896 15 25 43 15 27 30 SN1979C 18 28 46 10.1 642.2 6.1 46.4 -7 2896 No stop 15 30 30 --- 18 31 47 9.5 642.7 6.1 46.3 173 2919 15 27 33 15 31 20 J1215+17 18 32 37 8.8 645.0 6.3 46.0 43 2919 15 31 15 15 32 50 --- 18 34 07 8.5 645.3 6.3 45.9 90 2931 15 31 18 15 32 50 SN1979C 18 34 07 9.1 643.1 6.2 46.2 -7 2931 No stop 15 35 40 --- 18 36 58 8.6 643.6 6.2 46.0 163 2953 15 32 53 Schedule for MEDICINA (Code Mc ) Page 13 11th epoch of obs. of SN1979C in M100: VLBA/MkIV 6cm pol. 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 25 Oct 2011 Day 298 --- 15 35 40 J1215+17 18 36 58 8.0 645.8 6.4 45.8 -7 2953 No stop 15 37 30 --- 18 38 48 7.7 646.1 6.4 45.7 103 2968 15 35 43 15 37 30 SN1979C 18 38 48 8.3 643.9 6.3 46.0 -7 2968 No stop 15 40 30 --- 18 41 48 7.8 644.4 6.3 45.8 173 2991 15 37 33 15 41 20 J1215+17 18 42 39 7.1 646.7 6.4 45.5 43 2991 15 41 15 15 42 50 --- 18 44 09 6.8 647.0 6.5 45.4 90 3003 15 41 18 15 42 50 SN1979C 18 44 09 7.4 644.8 6.3 45.7 -7 3003 No stop 15 45 40 --- 18 46 59 6.9 645.3 6.4 45.6 163 3025 15 42 53 15 45 40 J1215+17 18 46 59 6.3 647.5 6.5 45.3 -7 3025 No stop 15 47 30 --- 18 48 50 6.0 647.8 6.6 45.2 103 3039 15 45 43 15 47 30 SN1979C 18 48 50 6.6 645.6 6.4 45.5 -7 3039 No stop 15 50 30 --- 18 51 50 6.1 646.1 6.5 45.4 173 3062 15 47 33 15 51 20 J1215+17 18 52 40 5.4 648.4 6.6 45.0 43 3062 15 51 15 15 52 50 --- 18 54 10 5.1 648.7 6.6 44.9 90 3075 15 51 18 15 52 50 SN1979C 18 54 10 5.7 646.5 6.5 45.2 -7 3075 No stop 15 55 40 --- 18 57 01 5.2 647.0 6.6 45.1 163 3097 15 52 53 SETUP FILE INFORMATION: NOTE: If DOPPLER, FREQ, or BW were used, see the individual scans for the final BBC settings. Setup file: globGbps.6cm Matching groups in /usr/local/sched/catalogs/freq.dat: mc6cm Values confirmed by E-mail A.Orfei (JFD 2Oct98) Setup group: 1 Station: MEDICINA 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= 4600.00 4600.00 4600.00 4600.00 4600.00 4600.00 4600.00 4600.00 4600.00 4600.00 4600.00 4600.00 4600.00 4600.00 4600.00 4600.00 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 = 2 1 2 1 4 3 4 3 6 5 6 5 8 7 8 7 BBC SB= L L U U L L U U L L U U L L U U IF = 2N 1N 2N 1N 2N 1N 2N 1N 2N 1N 2N 1N 2N 1N 2N 1N The following frequency sets based on these setups were used. Frequency Set: 11 Setup file default. LO sum= 4942.49 4942.49 4942.49 4942.49 4974.49 4974.49 4974.49 4974.49 5006.49 5006.49 5006.49 5006.49 5038.49 5038.49 5038.49 5038.49 BBC fr= 342.49 342.49 342.49 342.49 374.49 374.49 374.49 374.49 406.49 406.49 406.49 406.49 438.49 438.49 438.49 438.49 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 Matching frequency sets: 11 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 -- 11th epoch of obs. of SN1979C in M100: VLBA/MkIV 6cm pol. 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) * SN1979C 12 20 26.708149 * 12 22 58.666427 12 23 34.258856 0.00 16 04 29.46765 * 15 47 51.95179 15 43 54.62585 0.00 From catalog imbedded in main SCHED input file. 8.994 scan and 665.198 baseline hours in setup: globGbps.6cm Frequency sets (dups not shown): 1 10 11 12 13 14 15 16 17 18 19 * 3C273 12 26 33.246145 * 12 29 06.700041 12 29 42.737584 0.00 02 19 43.30589 * 02 03 08.59840 01 59 14.55075 0.00 From catalog imbedded in main SCHED input file. 0.022 scan and 3.400 baseline hours in setup: globGbps.6cm Frequency sets (dups not shown): 1 10 11 12 13 14 15 16 18 19 * J1215+17 12 12 31.449683 * 12 15 03.979124 12 15 39.719922 0.00 17 11 18.14600 * 16 54 37.95736 16 50 39.48527 0.00 From catalog imbedded in main SCHED input file. 4.267 scan and 315.053 baseline hours in setup: globGbps.6cm Frequency sets (dups not shown): 1 10 11 12 13 14 15 16 17 18 19 * OQ208 14 04 45.615152 * 14 07 00.394411 14 07 31.518027 0.00 28 41 29.23491 * 28 27 14.68994 28 23 54.84502 0.00 From catalog imbedded in main SCHED input file. 0.050 scan and 2.531 baseline hours in setup: globGbps.6cm Frequency sets (dups not shown): 1 18 * OJ287 08 51 57.250620 * 08 54 48.874931 08 55 30.167405 0.00 20 17 58.41739 * 20 06 30.64084 20 03 41.25723 0.00 From catalog imbedded in main SCHED input file. 0.050 scan and 6.800 baseline hours in setup: globGbps.6cm Frequency sets (dups not shown): 1 10 11 12 13 14 15 16 17 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) SN1979C 36.5 3C273 26.3 J1215+17 38.6 OQ208 40.6 OJ287 81.2 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