COVER INFORMATION Station: WSTRBORK (Code Wb ) Experiment: Confirmation of close dual quasars at z=0.6-2.5 Exp. Code: ES103G Schedule Version: 2.00 Processed by SCHED version: 11.60 Release 11.6; April 2020 PI: Yiping SHU Address: Purple Mountain Observatory, Chinese Academy of Sciences No. 10 Yuanhua Road Nanjing China Phone: +86 15946854256 EMAIL: yiping.shu@pmo.ac.cn Fax: Phone during observation: +86 15946854256 Observing mode: vlbi Notes: # Please turn PHASE CAL ON # COVER LETTER: Schedule for WSTRBORK (Code Wb ) Page 2 Confirmation of close dual quasars at z=0.6-2.5 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 23 Feb 2023 Day 54 --- Next scan frequencies: 4958.49 4958.49 4958.49 4958.49 5022.49 5022.49 5022.49 5022.49 Next BBC frequencies: 371.49 371.49 371.49 371.49 435.49 435.49 435.49 435.49 Next scan bandwidths: 32.00 32.00 32.00 32.00 32.00 32.00 32.00 32.00 16 36 00 J0905+4850 03 15 38 37.9 56.6 -5.9 0.0 0 0 16 36 00 16 41 00 =0902+490 03 20 38 38.6 57.3 -5.8 0.0 300 39 16 36 01 16 41 00 SDSSJ0910+49 03 20 38 38.2 56.3 -5.9 0.0 -17 39 No stop 16 44 00 --- 03 23 39 38.6 56.7 -5.8 0.0 163 62 16 41 01 16 44 30 J0905+4850 03 24 09 39.0 57.8 -5.7 0.0 13 62 16 44 30 16 46 30 =0902+490 03 26 09 39.3 58.1 -5.7 0.0 120 77 16 44 31 16 46 30 SDSSJ0910+49 03 26 09 38.9 57.0 -5.8 0.0 -17 77 No stop 16 49 30 --- 03 29 10 39.3 57.4 -5.7 0.0 163 100 16 46 31 16 49 30 J0905+4850 03 29 10 39.6 58.5 -5.6 0.0 -17 100 No stop 16 51 30 =0902+490 03 31 10 39.9 58.7 -5.6 0.0 103 116 16 49 31 16 51 30 SDSSJ0910+49 03 31 10 39.6 57.7 -5.7 0.0 -17 116 No stop 16 54 30 --- 03 34 11 40.0 58.1 -5.6 0.0 163 139 16 51 31 16 55 00 J0905+4850 03 34 41 40.4 59.2 -5.5 0.0 13 139 16 55 00 16 57 00 =0902+490 03 36 41 40.6 59.5 -5.5 0.0 120 155 16 55 01 16 57 00 SDSSJ0910+49 03 36 41 40.3 58.4 -5.6 0.0 -17 155 No stop 17 00 00 --- 03 39 41 40.7 58.8 -5.5 0.0 163 178 16 57 01 17 00 00 J0905+4850 03 39 41 41.0 59.9 -5.5 0.0 -17 178 No stop 17 02 00 =0902+490 03 41 42 41.3 60.1 -5.4 0.0 103 193 17 00 01 17 02 00 SDSSJ0910+49 03 41 42 40.9 59.1 -5.5 0.0 -17 193 No stop 17 05 00 --- 03 44 42 41.3 59.5 -5.4 0.0 163 216 17 02 01 17 05 30 J0905+4850 03 45 12 41.7 60.6 -5.4 0.0 13 216 17 05 30 17 07 30 =0902+490 03 47 13 42.0 60.9 -5.3 0.0 120 232 17 05 31 17 07 30 SDSSJ0910+49 03 47 13 41.6 59.8 -5.4 0.0 -17 232 No stop 17 10 30 --- 03 50 13 42.0 60.2 -5.4 0.0 163 255 17 07 31 17 10 30 J0905+4850 03 50 13 42.4 61.3 -5.3 0.0 -17 255 No stop 17 12 30 =0902+490 03 52 14 42.7 61.5 -5.2 0.0 103 271 17 10 31 17 12 30 SDSSJ0910+49 03 52 14 42.3 60.5 -5.3 0.0 -17 271 No stop 17 15 30 --- 03 55 14 42.7 60.9 -5.3 0.0 163 294 17 12 31 Schedule for WSTRBORK (Code Wb ) Page 3 Confirmation of close dual quasars at z=0.6-2.5 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 23 Feb 2023 Day 54 --- 17 16 00 J0905+4850 03 55 44 43.1 62.0 -5.2 0.0 13 294 17 16 00 17 18 00 =0902+490 03 57 44 43.4 62.3 -5.2 0.0 120 309 17 16 01 17 18 00 SDSSJ0910+49 03 57 44 43.0 61.2 -5.2 0.0 -17 309 No stop 17 21 00 --- 04 00 45 43.4 61.6 -5.2 0.0 163 332 17 18 01 17 21 00 J0905+4850 04 00 45 43.8 62.7 -5.1 0.0 -17 332 No stop 17 23 00 =0902+490 04 02 45 44.1 62.9 -5.1 0.0 103 348 17 21 01 17 23 00 SDSSJ0910+49 04 02 45 43.7 61.9 -5.1 0.0 -17 348 No stop 17 26 00 --- 04 05 46 44.1 62.3 -5.1 0.0 163 371 17 23 01 17 26 30 J0905+4850 04 06 16 44.5 63.4 -5.0 0.0 13 371 17 26 30 17 28 30 =0902+490 04 08 16 44.8 63.7 -5.0 0.0 120 386 17 26 31 17 28 30 SDSSJ0910+49 04 08 16 44.4 62.6 -5.1 0.0 -17 386 No stop 17 31 30 --- 04 11 17 44.8 63.0 -5.0 0.0 163 410 17 28 31 17 31 30 J0905+4850 04 11 17 45.2 64.1 -4.9 0.0 -17 410 No stop 17 33 30 =0902+490 04 13 17 45.5 64.3 -4.9 0.0 103 425 17 31 31 17 33 30 SDSSJ0910+49 04 13 17 45.1 63.3 -5.0 0.0 -17 425 No stop 17 36 30 --- 04 16 17 45.5 63.7 -4.9 0.0 163 448 17 33 31 17 37 00 J0905+4850 04 16 48 46.0 64.8 -4.8 0.0 13 448 17 37 00 17 39 00 =0902+490 04 18 48 46.2 65.1 -4.8 0.0 120 464 17 37 01 17 39 00 SDSSJ0910+49 04 18 48 45.8 64.0 -4.9 0.0 -17 464 No stop 17 42 00 --- 04 21 48 46.2 64.4 -4.8 0.0 163 487 17 39 01 17 42 00 J0905+4850 04 21 48 46.6 65.5 -4.8 0.0 -17 487 No stop 17 44 00 =0902+490 04 23 49 46.9 65.7 -4.7 0.0 103 502 17 42 01 17 44 00 SDSSJ0910+49 04 23 49 46.5 64.6 -4.8 0.0 -17 502 No stop 17 47 00 --- 04 26 49 46.9 65.0 -4.7 0.0 163 526 17 44 01 17 47 30 J0905+4850 04 27 19 47.4 66.2 -4.7 0.0 13 526 17 47 30 17 49 30 =0902+490 04 29 20 47.7 66.5 -4.6 0.0 120 541 17 47 31 17 49 30 SDSSJ0910+49 04 29 20 47.3 65.4 -4.7 0.0 -17 541 No stop 17 52 30 --- 04 32 20 47.7 65.8 -4.7 0.0 163 564 17 49 31 17 52 30 J0905+4850 04 32 20 48.1 66.9 -4.6 0.0 -17 564 No stop 17 54 30 =0902+490 04 34 20 48.4 67.1 -4.5 0.0 103 580 17 52 31 Schedule for WSTRBORK (Code Wb ) Page 4 Confirmation of close dual quasars at z=0.6-2.5 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 23 Feb 2023 Day 54 --- 17 54 30 SDSSJ0910+49 04 34 20 48.0 66.0 -4.6 0.0 -17 580 No stop 17 57 30 --- 04 37 21 48.4 66.4 -4.6 0.0 163 603 17 54 31 17 58 00 J0905+4850 04 37 51 48.9 67.6 -4.5 0.0 13 603 17 58 00 18 00 00 =0902+490 04 39 51 49.1 67.9 -4.5 0.0 120 618 17 58 01 18 00 00 SDSSJ0910+49 04 39 51 48.7 66.8 -4.5 0.0 -17 618 No stop 18 03 00 --- 04 42 52 49.1 67.2 -4.5 0.0 163 642 18 00 01 18 03 00 J0905+4850 04 42 52 49.6 68.3 -4.4 0.0 -17 642 No stop 18 05 00 =0902+490 04 44 52 49.8 68.6 -4.4 0.0 103 657 18 03 01 18 05 00 SDSSJ0910+49 04 44 52 49.4 67.4 -4.4 0.0 -17 657 No stop 18 08 00 --- 04 47 53 49.8 67.8 -4.4 0.0 163 680 18 05 01 18 08 30 J0905+4850 04 48 23 50.3 69.0 -4.3 0.0 13 680 18 08 30 18 10 30 =0902+490 04 50 23 50.6 69.3 -4.3 0.0 120 696 18 08 31 18 10 30 SDSSJ0910+49 04 50 23 50.2 68.1 -4.4 0.0 -17 696 No stop 18 13 30 --- 04 53 24 50.6 68.5 -4.3 0.0 163 719 18 10 31 18 13 30 J0905+4850 04 53 24 51.1 69.7 -4.2 0.0 -17 719 No stop 18 15 30 =0902+490 04 55 24 51.3 70.0 -4.2 0.0 103 734 18 13 31 18 15 30 SDSSJ0910+49 04 55 24 50.9 68.8 -4.3 0.0 -17 734 No stop 18 18 30 --- 04 58 24 51.3 69.2 -4.2 0.0 163 757 18 15 31 18 19 00 J0905+4850 04 58 54 51.8 70.4 -4.1 0.0 13 757 18 19 00 18 21 00 =0902+490 05 00 55 52.1 70.7 -4.1 0.0 120 773 18 19 01 18 21 00 SDSSJ0910+49 05 00 55 51.7 69.5 -4.2 0.0 -17 773 No stop 18 24 00 --- 05 03 55 52.1 69.9 -4.1 0.0 163 796 18 21 01 18 24 00 J0905+4850 05 03 55 52.5 71.1 -4.1 0.0 -17 796 No stop 18 26 00 =0902+490 05 05 56 52.8 71.4 -4.0 0.0 103 812 18 24 01 18 27 00 J0927+3902 05 06 56 44.2 80.3 -4.4 0.0 14 812 18 27 00 18 32 00 =4C39.25 05 11 57 44.9 81.2 -4.3 0.0 300 850 18 27 01 18 33 00 J0905+4850 05 12 57 53.8 72.4 -3.9 0.0 14 850 18 33 00 18 38 00 =0902+490 05 17 58 54.6 73.0 -3.8 0.0 300 889 18 33 01 18 38 00 SDSSJ0910+49 05 17 58 54.1 71.8 -3.9 0.0 -17 889 No stop 18 41 00 --- 05 20 58 54.5 72.2 -3.8 0.0 163 912 18 38 01 Schedule for WSTRBORK (Code Wb ) Page 5 Confirmation of close dual quasars at z=0.6-2.5 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 23 Feb 2023 Day 54 --- 18 41 30 J0905+4850 05 21 28 55.1 73.5 -3.8 0.0 13 912 18 41 30 18 43 30 =0902+490 05 23 28 55.4 73.8 -3.7 0.0 120 927 18 41 31 18 43 30 SDSSJ0910+49 05 23 28 54.9 72.6 -3.8 0.0 -17 927 No stop 18 46 30 --- 05 26 29 55.3 73.0 -3.8 0.0 163 951 18 43 31 18 46 30 J0905+4850 05 26 29 55.8 74.2 -3.7 0.0 -17 951 No stop 18 48 30 =0902+490 05 28 29 56.1 74.5 -3.6 0.0 103 966 18 46 31 18 48 30 SDSSJ0910+49 05 28 29 55.6 73.2 -3.7 0.0 -17 966 No stop 18 51 30 --- 05 31 30 56.0 73.7 -3.7 0.0 163 989 18 48 31 18 52 00 J0905+4850 05 32 00 56.6 75.0 -3.6 0.0 13 989 18 52 00 18 54 00 =0902+490 05 34 00 56.9 75.3 -3.6 0.0 120 1005 18 52 01 18 54 00 SDSSJ0910+49 05 34 00 56.4 74.0 -3.6 0.0 -17 1005 No stop 18 57 00 --- 05 37 01 56.8 74.4 -3.6 0.0 163 1028 18 54 01 18 57 00 J0905+4850 05 37 01 57.3 75.7 -3.5 0.0 -17 1028 No stop 18 59 00 =0902+490 05 39 01 57.6 76.0 -3.5 0.0 103 1043 18 57 01 18 59 00 SDSSJ0910+49 05 39 01 57.1 74.7 -3.5 0.0 -17 1043 No stop 19 02 00 --- 05 42 01 57.6 75.1 -3.5 0.0 163 1067 18 59 01 19 02 30 J0905+4850 05 42 32 58.1 76.5 -3.4 0.0 13 1067 19 02 30 19 04 30 =0902+490 05 44 32 58.4 76.8 -3.4 0.0 120 1082 19 02 31 19 04 30 SDSSJ0910+49 05 44 32 57.9 75.4 -3.5 0.0 -17 1082 No stop 19 07 30 --- 05 47 32 58.4 75.9 -3.4 0.0 163 1105 19 04 31 19 07 30 J0905+4850 05 47 32 58.9 77.2 -3.3 0.0 -17 1105 No stop 19 09 30 =0902+490 05 49 33 59.2 77.5 -3.3 0.0 103 1121 19 07 31 19 09 30 SDSSJ0910+49 05 49 33 58.7 76.1 -3.4 0.0 -17 1121 No stop 19 12 30 --- 05 52 33 59.1 76.6 -3.3 0.0 163 1144 19 09 31 19 13 00 J0905+4850 05 53 03 59.7 78.0 -3.2 0.0 13 1144 19 13 00 19 15 00 =0902+490 05 55 04 60.0 78.3 -3.2 0.0 120 1159 19 13 01 19 15 00 SDSSJ0910+49 05 55 04 59.5 76.9 -3.3 0.0 -17 1159 No stop 19 18 00 --- 05 58 04 59.9 77.3 -3.2 0.0 163 1183 19 15 01 19 18 00 J0905+4850 05 58 04 60.4 78.7 -3.2 0.0 -17 1183 No stop 19 20 00 =0902+490 06 00 04 60.7 79.0 -3.1 0.0 103 1198 19 18 01 Schedule for WSTRBORK (Code Wb ) Page 6 Confirmation of close dual quasars at z=0.6-2.5 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 23 Feb 2023 Day 54 --- 19 20 00 SDSSJ0910+49 06 00 04 60.2 77.6 -3.2 0.0 -17 1198 No stop 19 23 00 --- 06 03 05 60.7 78.1 -3.1 0.0 163 1221 19 20 01 19 23 30 J0905+4850 06 03 35 61.2 79.6 -3.1 0.0 13 1221 19 23 30 19 25 30 =0902+490 06 05 35 61.5 79.9 -3.0 0.0 120 1237 19 23 31 19 25 30 SDSSJ0910+49 06 05 35 61.0 78.4 -3.1 0.0 -17 1237 No stop 19 28 30 --- 06 08 36 61.5 78.9 -3.1 0.0 163 1260 19 25 31 19 28 30 J0905+4850 06 08 36 62.0 80.3 -3.0 0.0 -17 1260 No stop 19 30 30 =0902+490 06 10 36 62.3 80.6 -2.9 0.0 103 1275 19 28 31 19 30 30 SDSSJ0910+49 06 10 36 61.8 79.2 -3.0 0.0 -17 1275 No stop 19 33 30 --- 06 13 37 62.2 79.6 -3.0 0.0 163 1298 19 30 31 19 34 00 J0905+4850 06 14 07 62.8 81.2 -2.9 0.0 13 1298 19 34 00 19 36 00 =0902+490 06 16 07 63.1 81.5 -2.8 0.0 120 1314 19 34 01 19 36 00 SDSSJ0910+49 06 16 07 62.6 80.0 -2.9 0.0 -17 1314 No stop 19 39 00 --- 06 19 08 63.0 80.4 -2.9 0.0 163 1337 19 36 01 19 39 00 J0905+4850 06 19 08 63.5 81.9 -2.8 0.0 -17 1337 No stop 19 41 00 =0902+490 06 21 08 63.8 82.3 -2.8 0.0 103 1353 19 39 01 19 41 00 SDSSJ0910+49 06 21 08 63.3 80.7 -2.8 0.0 -17 1353 No stop 19 44 00 --- 06 24 08 63.8 81.2 -2.8 0.0 163 1376 19 41 01 19 44 30 J0905+4850 06 24 38 64.4 82.8 -2.7 0.0 13 1376 19 44 30 19 46 30 =0902+490 06 26 39 64.7 83.1 -2.7 0.0 120 1391 19 44 31 19 46 30 SDSSJ0910+49 06 26 39 64.2 81.6 -2.8 0.0 -17 1391 No stop 19 49 30 --- 06 29 39 64.6 82.0 -2.7 0.0 163 1414 19 46 31 19 49 30 J0905+4850 06 29 39 65.1 83.6 -2.6 0.0 -17 1414 No stop 19 51 30 =0902+490 06 31 40 65.4 84.0 -2.6 0.0 103 1430 19 49 31 19 51 30 SDSSJ0910+49 06 31 40 64.9 82.3 -2.7 0.0 -17 1430 No stop 19 54 30 --- 06 34 40 65.4 82.8 -2.6 0.0 163 1453 19 51 31 19 55 00 J0905+4850 06 35 10 66.0 84.5 -2.5 0.0 13 1453 19 55 00 19 57 00 =0902+490 06 37 11 66.3 84.9 -2.5 0.0 120 1469 19 55 01 19 57 00 SDSSJ0910+49 06 37 11 65.7 83.2 -2.6 0.0 -17 1469 No stop 20 00 00 --- 06 40 11 66.2 83.7 -2.5 0.0 163 1492 19 57 01 Schedule for WSTRBORK (Code Wb ) Page 7 Confirmation of close dual quasars at z=0.6-2.5 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 23 Feb 2023 Day 54 --- 20 00 00 J0905+4850 06 40 11 66.7 85.4 -2.4 0.0 -17 1492 No stop 20 02 00 =0902+490 06 42 11 67.0 85.7 -2.4 0.0 103 1507 20 00 01 20 02 00 SDSSJ0910+49 06 42 11 66.5 84.0 -2.5 0.0 -17 1507 No stop 20 05 00 --- 06 45 12 66.9 84.5 -2.4 0.0 163 1530 20 02 01 20 05 30 J0905+4850 06 45 42 67.5 86.3 -2.4 0.0 13 1530 20 05 30 20 07 30 =0902+490 06 47 42 67.8 86.7 -2.3 0.0 120 1546 20 05 31 20 07 30 SDSSJ0910+49 06 47 42 67.3 84.9 -2.4 0.0 -17 1546 No stop 20 10 30 --- 06 50 43 67.8 85.4 -2.3 0.0 163 1569 20 07 31 20 10 30 J0905+4850 06 50 43 68.3 87.2 -2.3 0.0 -17 1569 No stop 20 12 30 =0902+490 06 52 43 68.6 87.6 -2.2 0.0 103 1584 20 10 31 20 12 30 SDSSJ0910+49 06 52 43 68.1 85.8 -2.3 0.0 -17 1584 No stop 20 15 30 --- 06 55 44 68.5 86.3 -2.3 0.0 163 1608 20 12 31 20 16 00 J0905+4850 06 56 14 69.1 88.3 -2.2 0.0 13 1608 20 16 00 20 18 00 =0902+490 06 58 14 69.4 88.6 -2.1 0.0 120 1623 20 16 01 20 18 00 SDSSJ0910+49 06 58 14 68.9 86.8 -2.2 0.0 -17 1623 No stop 20 21 00 --- 07 01 14 69.3 87.3 -2.2 0.0 163 1646 20 18 01 20 21 00 J0905+4850 07 01 14 69.9 89.2 -2.1 0.0 -17 1646 No stop 20 23 00 =0902+490 07 03 15 70.2 89.6 -2.1 0.0 103 1662 20 21 01 20 24 00 J0927+3902 07 04 15 61.7 105.0 -2.4 0.0 14 1662 20 24 00 20 30 00 =4C39.25 07 10 16 62.6 106.7 -2.3 0.0 360 1708 20 24 01 SETUP FILE INFORMATION: NOTE: If DOPPLER, FREQ, or BW were used, see the individual scans for the final BBC settings. ======== Setup file: sess123.C2048 --- WARNING --- This group does not match an entry in the frequency catalog. This might be ok because the catalog is not complete. But be very careful to be sure that the setup is correct. Setup group: 9 Station: WSTRBORK Total bit rate: 1024 Format: VDIF Bits per sample: 2 Sample rate: 64.000 Number of channels: 8 DBE type: DBBC_DDC Speedup factor: 1.00 Disk used to record data. 1st LO= 4587.00 4587.00 4587.00 4587.00 4587.00 4587.00 4587.00 4587.00 Net SB= L L U U L L U U IF SB = U U U U U U U U Pol. = RCP LCP RCP LCP RCP LCP RCP LCP BBC = 1 9 1 9 2 10 2 10 BBC SB= L L U U L L U U IF = A1 B1 A1 B1 A1 B1 A1 B1 The following frequency sets based on these setups were used. Frequency Set: 9 Setup file default. Used with PCAL = off LO sum= 4958.49 4958.49 4958.49 4958.49 5022.49 5022.49 5022.49 5022.49 BBC fr= 371.49 371.49 371.49 371.49 435.49 435.49 435.49 435.49 Bandwd= 32.00 32.00 32.00 32.00 32.00 32.00 32.00 32.00 Matching frequency sets: 9 Track assignments are: track1= 1, 2, 3, 4, 5, 6, 7, 8 barrel=roll_off POSITIONS OF SOURCES USED IN RECORDING SCANS Source Source position (RA/Dec) Error (B1950) (J2000) (Date) (mas) * SDSSJ0910+49 09 06 35.862881 * 09 10 02.590000 09 11 39.478693 0.00 49 27 13.94852 * 49 15 00.25000 49 09 23.76236 0.00 From catalog imbedded in main SCHED input file. 0902+490 09 02 00.374037 * 09 05 27.463885 09 07 04.490285 0.15 * J0905+4850 49 02 49.85961 * 48 50 49.96508 48 45 20.07373 0.15 /home/guest/rmc/SCHED/sched11.6/catalogs/sources.gsfc GSFC 2016a X/S astro solution, 114 observations. 4C39.25 09 23 55.319216 * 09 27 03.013937 09 28 30.898990 0.31 * J0927+3902 39 15 23.56644 * 39 02 20.85185 38 56 19.59308 0.16 0923+392 /home/guest/rmc/SCHED/sched11.6/catalogs/sources.gsfc J0927+39 GSFC 2016a X/S astro solution, 250526 observations. SOURCE SCAN SUMMARY FOR SOURCES LISTED ABOVE Scan hours are for recording scans only. Baseline hours are only counted for scans above horizon at both ends. Source Setup file Frequency sets Observing hours (duplicates not shown) Scan Baseline SDSSJ0910+4sess123.C2048 1 2 3 4 5 6 7 8 9 2.000 64.635 J0905+4850 sess123.C2048 1 2 3 4 5 6 7 8 9 1.500 45.476 J0927+3902 sess123.C2048 1 2 3 4 5 6 7 8 9 0.267 8.878 EFFECT OF SOLAR CORONA 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) SDSSJ0910+49 137.6 J0905+4850 137.5 J0927+3902 148.0 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