COVER INFORMATION Station: VLBA_OV (Code Ov ) Experiment: IGR J1746-321 ToO Exp. Code: BM197B Schedule Version: 1.00 Processed by SCHED version: Release of 02 July 2002 PI: Amy Mioduszewski Address: NRAO P. O. Box O Socorro, NM 87801 USA Phone: 505-835-7263 EMAIL: amiodusz@nrao.edu Fax: 505-835-7027 Phone during observation: 505-838-0393 Observing mode: VLBA Notes: Target of Opportunity Schedule for VLBA_OV (Code Ov ) Page 2 IGR J1746-321 ToO UP: D => Below limits; H => Below horizon mask. blank => Up. Early: Seconds between end of slew and start. Dwell: On source seconds. Tapes: Drive, Index, Start footage / Direction, Head Group, End footage. TPStart: Tape motion start time. Frequencies are LO sum (band edge). 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) ---------------------------------------------------------------------------------------- --- Tue 8 Apr 2003 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 Next scan bandwidths: 8.00 8.00 8.00 8.00 8.00 8.00 8.00 8.00 11 02 00 J1733-1304 16 14 05 36.4 155.8 -1.3 -19.5 0 1 1 0 11 02 00 11 03 00 --- 16 15 05 36.4 156.1 -1.3 -19.3 60 F 1 800 11 03 00 I1746-321 16 15 05 17.3 159.9 -1.5 -18.9 -44 1 1 800 11 03 00 11 05 00 --- 16 17 06 17.5 160.3 -1.5 -18.5 76 F 1 2400 11 05 00 W109 16 17 06 20.2 158.7 -1.5 -19.3 -12 1 1 2400 11 05 00 11 06 00 --- 16 18 06 20.3 158.9 -1.5 -19.1 48 F 1 3200 11 06 00 I1746-321 16 18 06 17.5 160.5 -1.5 -18.3 -12 1 1 3200 11 06 00 11 08 00 --- 16 20 06 17.7 160.9 -1.4 -17.9 108 F 1 4800 11 08 00 W109 16 20 06 20.4 159.4 -1.5 -18.7 -12 1 1 4800 11 08 00 11 09 00 --- 16 21 06 20.5 159.6 -1.5 -18.5 48 F 1 5600 11 09 00 I1746-321 16 21 06 17.7 161.1 -1.4 -17.7 -12 1 1 5600 11 09 00 11 11 00 --- 16 23 07 17.9 161.6 -1.4 -17.3 108 F 1 7200 11 11 00 W109 16 23 07 20.7 160.0 -1.4 -18.1 -12 1 1 7200 11 11 00 11 12 00 --- 16 24 07 20.7 160.3 -1.4 -17.9 48 F 1 8000 11 12 00 I1746-321 16 24 07 17.9 161.8 -1.4 -17.1 -12 1 1 8000 11 12 00 11 14 00 --- 16 26 07 18.0 162.2 -1.3 -16.7 108 F 1 9600 11 14 00 W109 16 26 07 20.9 160.7 -1.4 -17.5 -12 1 1 9600 11 14 00 11 15 00 --- 16 27 07 20.9 160.9 -1.4 -17.3 48 F 1 10400 11 15 00 I1746-321 16 27 07 18.1 162.4 -1.3 -16.5 -12 1 1 10400 11 15 00 11 17 30 --- 16 29 38 18.3 163.0 -1.3 -16.0 138 F 1 12400 11 17 30 GC441 16 29 38 21.2 163.4 -1.2 -15.2 -12 1 1 12400 11 17 30 11 18 30 --- 16 30 38 21.3 163.6 -1.2 -15.0 48 F 1 13200 11 18 30 I1746-321 16 30 38 18.3 163.2 -1.3 -15.8 -12 1 1 13200 11 18 30 11 20 30 --- 16 32 38 18.4 163.6 -1.2 -15.4 108 F 1 14800 Schedule for VLBA_OV (Code Ov ) Page 3 IGR J1746-321 ToO UP: D => Below limits; H => Below horizon mask. blank => Up. Early: Seconds between end of slew and start. Dwell: On source seconds. Tapes: Drive, Index, Start footage / Direction, Head Group, End footage. TPStart: Tape motion start time. Frequencies are LO sum (band edge). 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) ---------------------------------------------------------------------------------------- --- Tue 8 Apr 2003 Day 98 --- 11 20 30 GC441 16 32 38 21.4 164.0 -1.1 -14.6 -12 1 1 14800 11 20 30 11 21 30 --- 16 33 38 21.4 164.3 -1.1 -14.4 48 F 1 15600 11 21 30 W56 16 33 38 22.3 162.8 -1.2 -15.5 -8 1 1 15600 11 21 30 11 22 30 --- 16 34 38 22.3 163.0 -1.2 -15.3 52 F 1 16400 11 24 30 J1733-1304 16 36 39 38.0 162.4 -0.9 -14.3 83 1 1 16400 11 24 30 11 25 30 --- 16 37 39 38.0 162.7 -0.9 -14.0 60 F 1 17200 11 25 30 I1746-321 16 37 39 18.7 164.7 -1.1 -14.4 -45 1 2 17200 11 25 30 11 27 30 --- 16 39 39 18.8 165.1 -1.1 -14.0 75 R 1 15600 11 27 30 W109 16 39 39 21.7 163.7 -1.2 -14.8 -12 1 2 15600 11 27 30 11 28 30 --- 16 40 39 21.7 164.0 -1.1 -14.6 48 R 1 14800 11 28 30 I1746-321 16 40 39 18.9 165.3 -1.1 -13.8 -12 1 2 14800 11 28 30 11 30 30 --- 16 42 40 19.0 165.8 -1.1 -13.4 108 R 1 13200 11 30 30 W109 16 42 40 21.8 164.4 -1.1 -14.2 -12 1 2 13200 11 30 30 11 31 30 --- 16 43 40 21.9 164.7 -1.1 -14.0 48 R 1 12400 11 31 30 I1746-321 16 43 40 19.0 166.0 -1.0 -13.2 -12 1 2 12400 11 31 30 11 33 30 --- 16 45 40 19.1 166.4 -1.0 -12.8 108 R 1 10800 11 33 30 W109 16 45 40 22.0 165.1 -1.1 -13.5 -12 1 2 10800 11 33 30 11 34 30 --- 16 46 40 22.1 165.3 -1.0 -13.3 48 R 1 10000 11 34 30 I1746-321 16 46 40 19.1 166.6 -1.0 -12.6 -12 1 2 10000 11 34 30 11 36 30 --- 16 48 41 19.2 167.1 -1.0 -12.1 108 R 1 8400 11 36 30 W109 16 48 41 22.2 165.8 -1.0 -12.9 -12 1 2 8400 11 36 30 11 37 30 --- 16 49 41 22.2 166.0 -1.0 -12.7 48 R 1 7600 11 37 30 I1746-321 16 49 41 19.3 167.3 -0.9 -11.9 -12 1 2 7600 11 37 30 11 40 00 --- 16 52 11 19.4 167.9 -0.9 -11.4 138 R 1 5600 11 40 00 GC441 16 52 11 22.3 168.5 -0.8 -10.5 -12 1 2 5600 11 40 00 11 41 00 --- 16 53 11 22.3 168.7 -0.8 -10.3 48 R 1 4800 11 41 00 I1746-321 16 53 11 19.4 168.1 -0.9 -11.2 -12 1 2 4800 11 41 00 11 43 00 --- 16 55 12 19.5 168.5 -0.9 -10.8 108 R 1 3200 Schedule for VLBA_OV (Code Ov ) Page 4 IGR J1746-321 ToO UP: D => Below limits; H => Below horizon mask. blank => Up. Early: Seconds between end of slew and start. Dwell: On source seconds. Tapes: Drive, Index, Start footage / Direction, Head Group, End footage. TPStart: Tape motion start time. Frequencies are LO sum (band edge). 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) ---------------------------------------------------------------------------------------- --- Tue 8 Apr 2003 Day 98 --- 11 43 00 GC441 16 55 12 22.4 169.2 -0.8 -9.9 -12 1 2 3200 11 43 00 11 44 00 --- 16 56 12 22.4 169.4 -0.7 -9.7 48 R 1 2400 11 44 00 W56 16 56 12 23.4 168.1 -0.8 -10.8 -8 1 2 2400 11 44 00 11 45 00 --- 16 57 12 23.4 168.3 -0.8 -10.6 52 R 1 1600 11 47 00 J1733-1304 16 59 12 39.1 169.3 -0.6 -8.7 83 1 2 1600 11 47 00 11 48 00 --- 17 00 13 39.1 169.6 -0.6 -8.5 60 R 1 800 11 48 00 I1746-321 17 00 13 19.7 169.6 -0.8 -9.8 -45 1 3 800 11 48 00 11 50 00 --- 17 02 13 19.8 170.1 -0.7 -9.3 75 F 1 800 11 50 00 W109 17 02 13 22.7 168.9 -0.8 -10.1 -12 1 3 800 11 50 00 11 51 00 --- 17 03 13 22.8 169.2 -0.8 -9.9 48 F 1 1600 11 51 00 I1746-321 17 03 13 19.8 170.3 -0.7 -9.1 -12 1 3 1600 11 51 00 11 53 00 --- 17 05 13 19.9 170.7 -0.7 -8.7 108 F 1 3200 11 53 00 W109 17 05 13 22.9 169.6 -0.7 -9.4 -12 1 3 3200 11 53 00 11 54 00 --- 17 06 14 22.9 169.9 -0.7 -9.2 48 F 1 4000 11 54 00 I1746-321 17 06 14 19.9 171.0 -0.7 -8.5 -12 1 3 4000 11 54 00 11 56 00 --- 17 08 14 20.0 171.4 -0.6 -8.1 108 F 1 5600 11 56 00 W109 17 08 14 23.0 170.3 -0.7 -8.8 -12 1 3 5600 11 56 00 11 57 00 --- 17 09 14 23.0 170.6 -0.7 -8.6 48 F 1 6400 11 57 00 I1746-321 17 09 14 20.0 171.6 -0.6 -7.9 -12 1 3 6400 11 57 00 11 59 00 --- 17 11 14 20.0 172.1 -0.6 -7.5 108 F 1 8000 11 59 00 W109 17 11 14 23.1 171.1 -0.6 -8.1 -12 1 3 8000 11 59 00 12 00 00 --- 17 12 15 23.1 171.3 -0.6 -7.9 48 F 1 8800 12 00 00 I1746-321 17 12 15 20.1 172.3 -0.6 -7.2 -12 1 3 8800 12 00 00 12 02 30 --- 17 14 45 20.1 172.9 -0.5 -6.7 138 F 1 10800 12 02 30 GC441 17 14 45 23.0 173.8 -0.4 -5.7 -12 1 3 10800 12 02 30 12 03 30 --- 17 15 45 23.0 174.0 -0.4 -5.5 48 F 1 11600 12 03 30 I1746-321 17 15 45 20.2 173.1 -0.5 -6.5 -12 1 3 11600 12 03 30 12 05 30 --- 17 17 46 20.2 173.5 -0.5 -6.1 108 F 1 13200 Schedule for VLBA_OV (Code Ov ) Page 5 IGR J1746-321 ToO UP: D => Below limits; H => Below horizon mask. blank => Up. Early: Seconds between end of slew and start. Dwell: On source seconds. Tapes: Drive, Index, Start footage / Direction, Head Group, End footage. TPStart: Tape motion start time. Frequencies are LO sum (band edge). 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) ---------------------------------------------------------------------------------------- --- Tue 8 Apr 2003 Day 98 --- 12 05 30 GC441 17 17 46 23.0 174.5 -0.4 -5.0 -12 1 3 13200 12 05 30 12 06 30 --- 17 18 46 23.1 174.7 -0.4 -4.8 48 F 1 14000 12 06 30 W56 17 18 46 24.1 173.4 -0.5 -6.0 -8 1 3 14000 12 06 30 12 07 30 --- 17 19 46 24.1 173.7 -0.4 -5.7 52 F 1 14800 12 09 30 J1733-1304 17 21 46 39.6 176.4 -0.2 -3.0 83 1 3 14800 12 09 30 12 10 30 --- 17 22 46 39.6 176.7 -0.2 -2.7 60 F 1 15600 12 10 30 I1746-321 17 22 46 20.3 174.7 -0.4 -5.0 -45 1 3 15600 12 10 30 12 12 30 --- 17 24 47 20.3 175.1 -0.4 -4.6 75 F 1 17200 12 12 30 W109 17 24 47 23.4 174.2 -0.4 -5.2 -12 1 4 17200 12 12 30 12 13 30 --- 17 25 47 23.4 174.5 -0.4 -5.0 48 R 1 16400 12 13 30 I1746-321 17 25 47 20.4 175.3 -0.3 -4.4 -12 1 4 16400 12 13 30 12 15 30 --- 17 27 47 20.4 175.8 -0.3 -4.0 108 R 1 14800 12 15 30 W109 17 27 47 23.5 175.0 -0.4 -4.6 -12 1 4 14800 12 15 30 12 16 30 --- 17 28 47 23.5 175.2 -0.3 -4.4 48 R 1 14000 12 16 30 I1746-321 17 28 47 20.4 176.0 -0.3 -3.8 -12 1 4 14000 12 16 30 12 18 30 --- 17 30 48 20.4 176.5 -0.3 -3.3 108 R 1 12400 12 18 30 W109 17 30 48 23.5 175.7 -0.3 -3.9 -12 1 4 12400 12 18 30 12 19 30 --- 17 31 48 23.5 175.9 -0.3 -3.7 48 R 1 11600 12 19 30 I1746-321 17 31 48 20.4 176.7 -0.2 -3.1 -12 1 4 11600 12 19 30 12 21 30 --- 17 33 48 20.5 177.1 -0.2 -2.7 108 R 1 10000 12 21 30 W109 17 33 48 23.5 176.4 -0.3 -3.3 -12 1 4 10000 12 21 30 12 22 30 --- 17 34 48 23.6 176.6 -0.2 -3.1 48 R 1 9200 12 22 30 I1746-321 17 34 48 20.5 177.4 -0.2 -2.5 -12 1 4 9200 12 22 30 12 25 00 --- 17 37 19 20.5 177.9 -0.2 -1.9 138 R 1 7200 12 25 00 GC441 17 37 19 23.3 179.1 -0.1 -0.8 -12 1 4 7200 12 25 00 12 26 00 --- 17 38 19 23.3 179.3 0.0 -0.6 48 R 1 6400 12 26 00 I1746-321 17 38 19 20.5 178.2 -0.1 -1.7 -12 1 4 6400 12 26 00 12 28 00 --- 17 40 19 20.5 178.6 -0.1 -1.3 108 R 1 4800 Schedule for VLBA_OV (Code Ov ) Page 6 IGR J1746-321 ToO UP: D => Below limits; H => Below horizon mask. blank => Up. Early: Seconds between end of slew and start. Dwell: On source seconds. Tapes: Drive, Index, Start footage / Direction, Head Group, End footage. TPStart: Tape motion start time. Frequencies are LO sum (band edge). 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) ---------------------------------------------------------------------------------------- --- Tue 8 Apr 2003 Day 98 --- 12 28 00 GC441 17 40 19 23.3 179.8 0.0 -0.2 -12 1 4 4800 12 28 00 12 29 00 --- 17 41 19 23.3 180.1 0.0 0.0 48 R 1 4000 12 29 00 W56 17 41 19 24.4 178.9 -0.1 -1.0 -8 1 4 4000 12 29 00 12 30 00 --- 17 42 20 24.4 179.1 -0.1 -0.8 52 R 1 3200 12 32 00 J1733-1304 17 44 20 39.6 183.5 0.2 2.9 84 1 4 3200 12 32 00 12 33 00 --- 17 45 20 39.6 183.8 0.2 3.1 60 R 1 2400 12 33 00 I1746-321 17 45 20 20.5 179.7 0.0 -0.2 -44 1 4 2400 12 33 00 12 35 00 --- 17 47 20 20.5 180.2 0.0 0.2 76 R 1 800 12 35 00 W109 17 47 20 23.6 179.6 0.0 -0.4 -12 1 4 800 12 35 00 12 36 00 --- 17 48 21 23.6 179.9 0.0 -0.1 48 R 1 0 12 36 00 I1746-321 17 48 21 20.5 180.4 0.0 0.4 -12 1 5 0 12 36 00 12 38 00 --- 17 50 21 20.5 180.9 0.1 0.8 108 F 1 1600 12 38 00 W109 17 50 21 23.6 180.3 0.0 0.3 -12 1 5 1600 12 38 00 12 39 00 --- 17 51 21 23.6 180.6 0.0 0.5 48 F 1 2400 12 39 00 I1746-321 17 51 21 20.5 181.1 0.1 1.0 -12 1 5 2400 12 39 00 12 41 00 --- 17 53 21 20.5 181.6 0.1 1.5 108 F 1 4000 12 41 00 W109 17 53 21 23.6 181.0 0.1 1.0 -12 1 5 4000 12 41 00 12 42 00 --- 17 54 22 23.6 181.3 0.1 1.2 48 F 1 4800 12 42 00 I1746-321 17 54 22 20.5 181.8 0.1 1.7 -12 1 5 4800 12 42 00 12 44 00 --- 17 56 22 20.5 182.2 0.2 2.1 108 F 1 6400 12 44 00 W109 17 56 22 23.6 181.8 0.1 1.6 -12 1 5 6400 12 44 00 12 45 00 --- 17 57 22 23.6 182.0 0.1 1.8 48 F 1 7200 12 45 00 I1746-321 17 57 22 20.5 182.5 0.2 2.3 -12 1 5 7200 12 45 00 12 47 00 --- 17 59 22 20.5 182.9 0.2 2.7 108 F 1 8800 12 47 00 W109 17 59 22 23.6 182.5 0.2 2.3 -12 1 5 8800 12 47 00 12 48 00 --- 18 00 22 23.6 182.7 0.2 2.5 48 F 1 9600 12 48 00 I1746-321 18 00 22 20.5 183.1 0.2 3.0 -12 1 5 9600 12 48 00 12 50 00 --- 18 02 23 20.4 183.6 0.3 3.4 108 F 1 11200 Schedule for VLBA_OV (Code Ov ) Page 7 IGR J1746-321 ToO UP: D => Below limits; H => Below horizon mask. blank => Up. Early: Seconds between end of slew and start. Dwell: On source seconds. Tapes: Drive, Index, Start footage / Direction, Head Group, End footage. TPStart: Tape motion start time. Frequencies are LO sum (band edge). 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) ---------------------------------------------------------------------------------------- --- Tue 8 Apr 2003 Day 98 --- 12 50 00 W109 18 02 23 23.6 183.2 0.2 2.9 -12 1 5 11200 12 50 00 12 51 00 --- 18 03 23 23.6 183.4 0.2 3.1 48 F 1 12000 12 51 00 I1746-321 18 03 23 20.4 183.8 0.3 3.6 -12 1 5 12000 12 51 00 12 53 30 --- 18 05 53 20.4 184.4 0.3 4.1 138 F 1 14000 12 53 30 GC441 18 05 53 23.0 185.9 0.4 5.4 -11 1 5 14000 12 53 30 12 54 30 --- 18 06 54 23.0 186.1 0.4 5.6 49 F 1 14800 12 54 30 I1746-321 18 06 54 20.4 184.6 0.3 4.3 -11 1 5 14800 12 54 30 12 56 30 --- 18 08 54 20.3 185.1 0.4 4.8 109 F 1 16400 12 56 30 GC441 18 08 54 23.0 186.6 0.5 6.0 -11 1 5 16400 12 56 30 12 57 30 --- 18 09 54 22.9 186.8 0.5 6.2 49 F 1 17200 12 57 30 I1746-321 18 09 54 20.3 185.3 0.4 5.0 -11 1 6 17200 12 57 30 12 59 00 --- 18 11 24 20.3 185.6 0.4 5.3 79 R 1 16000 12 59 00 W56 18 11 24 24.2 186.1 0.4 5.5 -14 1 6 16000 12 59 00 13 00 00 --- 18 12 24 24.1 186.3 0.4 5.7 46 R 1 15200 SETUP FILE INFORMATION: NOTE: If DOPPLER, FREQ, or BW were used, see the individual scans for the final BBC settings. Setup file: /users/cwalker/sched/setups/v2cm-256-8-2.set Matches group v2cm_d3 in /users/cwalker/sched/catalogs/freq.dat Fourth 2cm filter Setup group: 1 Station: VLBA Total bit rate: 256 Format: VLBA1:2 Bits per sample: 2 Sample rate: 16.000 Number of channels: 8 Passes/head pos: 1 Speedup factor: 1.00 Tape speeds: Low density - 266.660 ips, High density - 160.00 ips Time per pass for 17600 ft, High density tapes is: 00:22:00 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: 1 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_auto SOURCE LIST -- IGR J1746-321 ToO 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). Source Source position (RA/Dec) (B1950) (J2000) (Date) * I1746-321 17 42 59.799246 * 17 46 15.607000 17 46 27.723285 -32 12 53.51182 *-32 14 00.70000 -32 14 06.16971 From catalog imbedded in main SCHED input file. * GC441 17 37 43.113166 * 17 40 54.524900 17 41 06.394475 -29 28 19.93553 *-29 29 50.29000 -29 29 58.12492 From catalog imbedded in main SCHED input file. * J1733-1304 17 30 13.535186 * 17 33 02.705784 17 33 13.246165 -13 02 45.83985 *-13 04 49.54833 -13 05 04.87816 From catalog imbedded in main SCHED input file. * W109 17 45 34.736305 * 17 48 45.684100 17 48 57.483620 -29 06 43.28585 *-29 07 39.37400 -29 07 45.19707 From catalog imbedded in main SCHED input file. * W56 17 42 42.769582 * 17 45 52.494900 17 46 04.233452 -28 19 17.62858 *-28 20 26.27000 -28 20 33.14011 From catalog imbedded in main SCHED input file. 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) I1746-321 110.9 GC441 112.3 J1733-1304 114.5 W109 110.6 W56 111.2 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