COVER INFORMATION Station: WSTRBORK (Code Wb ) Experiment: Confirmation of close dual quasars at z=0.6-2.5 Exp. Code: ES103I 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 ---------------------------------------------------------------------------------------- --- Tue 28 Feb 2023 Day 59 --- Next scan frequencies: 8383.49 8383.49 8383.49 8383.49 8447.49 8447.49 8447.49 8447.49 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 17 00 00 J0927+3902 03 59 24 34.4 69.0 -5.5 0.0 0 0 17 00 00 17 05 00 =4C39.25 04 04 25 35.1 69.8 -5.4 0.0 300 39 17 00 01 17 06 00 J0905+4850 04 05 25 44.4 63.3 -5.0 0.0 14 39 17 06 00 17 11 00 =0902+490 04 10 26 45.1 64.0 -4.9 0.0 300 77 17 06 01 17 11 00 SDSSJ0910+49 04 10 26 44.7 62.9 -5.0 0.0 -17 77 No stop 17 14 00 --- 04 13 27 45.1 63.3 -5.0 0.0 163 100 17 11 01 17 14 30 J0905+4850 04 13 57 45.6 64.4 -4.9 0.0 13 100 17 14 30 17 16 30 =0902+490 04 15 57 45.8 64.7 -4.9 0.0 120 116 17 14 31 17 16 30 SDSSJ0910+49 04 15 57 45.5 63.6 -4.9 0.0 -17 116 No stop 17 19 30 --- 04 18 57 45.9 64.0 -4.9 0.0 163 139 17 16 31 17 19 30 J0905+4850 04 18 57 46.3 65.1 -4.8 0.0 -17 139 No stop 17 21 30 =0902+490 04 20 58 46.5 65.4 -4.8 0.0 103 155 17 19 31 17 21 30 SDSSJ0910+49 04 20 58 46.1 64.3 -4.8 0.0 -17 155 No stop 17 24 30 --- 04 23 58 46.5 64.7 -4.8 0.0 163 178 17 21 31 17 25 00 J0905+4850 04 24 28 47.0 65.8 -4.7 0.0 13 178 17 25 00 17 27 00 =0902+490 04 26 29 47.3 66.1 -4.7 0.0 120 193 17 25 01 17 27 00 SDSSJ0910+49 04 26 29 46.9 65.0 -4.8 0.0 -17 193 No stop 17 30 00 --- 04 29 29 47.3 65.4 -4.7 0.0 163 216 17 27 01 17 30 00 J0905+4850 04 29 29 47.7 66.5 -4.6 0.0 -17 216 No stop 17 32 00 =0902+490 04 31 29 48.0 66.8 -4.6 0.0 103 232 17 30 01 17 32 00 SDSSJ0910+49 04 31 29 47.6 65.7 -4.7 0.0 -17 232 No stop 17 35 00 --- 04 34 30 48.0 66.1 -4.6 0.0 163 255 17 32 01 17 35 30 J0905+4850 04 35 00 48.5 67.2 -4.5 0.0 13 255 17 35 30 17 37 30 =0902+490 04 37 00 48.8 67.5 -4.5 0.0 120 271 17 35 31 17 37 30 SDSSJ0910+49 04 37 00 48.3 66.4 -4.6 0.0 -17 271 No stop 17 40 30 --- 04 40 01 48.7 66.8 -4.5 0.0 163 294 17 37 31 17 40 30 J0905+4850 04 40 01 49.2 67.9 -4.5 0.0 -17 294 No stop 17 42 30 =0902+490 04 42 01 49.5 68.2 -4.4 0.0 103 309 17 40 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 ---------------------------------------------------------------------------------------- --- Tue 28 Feb 2023 Day 59 --- 17 42 30 SDSSJ0910+49 04 42 01 49.0 67.0 -4.5 0.0 -17 309 No stop 17 45 30 --- 04 45 02 49.4 67.4 -4.4 0.0 163 332 17 42 31 17 46 00 J0905+4850 04 45 32 49.9 68.6 -4.4 0.0 13 332 17 46 00 17 48 00 =0902+490 04 47 32 50.2 68.9 -4.3 0.0 120 348 17 46 01 17 48 00 SDSSJ0910+49 04 47 32 49.8 67.8 -4.4 0.0 -17 348 No stop 17 51 00 --- 04 50 33 50.2 68.2 -4.4 0.0 163 371 17 48 01 17 51 00 J0905+4850 04 50 33 50.6 69.3 -4.3 0.0 -17 371 No stop 17 53 00 =0902+490 04 52 33 50.9 69.6 -4.2 0.0 103 386 17 51 01 17 53 00 SDSSJ0910+49 04 52 33 50.5 68.4 -4.3 0.0 -17 386 No stop 17 56 00 --- 04 55 33 50.9 68.8 -4.3 0.0 163 410 17 53 01 17 56 30 J0905+4850 04 56 04 51.4 70.1 -4.2 0.0 13 410 17 56 30 17 58 30 =0902+490 04 58 04 51.7 70.3 -4.2 0.0 120 425 17 56 31 17 58 30 SDSSJ0910+49 04 58 04 51.3 69.2 -4.2 0.0 -17 425 No stop 18 01 30 --- 05 01 04 51.7 69.6 -4.2 0.0 163 448 17 58 31 18 01 30 J0905+4850 05 01 04 52.1 70.7 -4.1 0.0 -17 448 No stop 18 03 30 =0902+490 05 03 05 52.4 71.0 -4.1 0.0 103 464 18 01 31 18 03 30 SDSSJ0910+49 05 03 05 52.0 69.8 -4.1 0.0 -17 464 No stop 18 06 30 --- 05 06 05 52.4 70.2 -4.1 0.0 163 487 18 03 31 18 07 00 J0905+4850 05 06 35 52.9 71.5 -4.0 0.0 13 487 18 07 00 18 09 00 =0902+490 05 08 36 53.2 71.8 -4.0 0.0 120 502 18 07 01 18 09 00 SDSSJ0910+49 05 08 36 52.8 70.6 -4.1 0.0 -17 502 No stop 18 12 00 --- 05 11 36 53.2 71.0 -4.0 0.0 163 526 18 09 01 18 12 00 J0905+4850 05 11 36 53.6 72.2 -3.9 0.0 -17 526 No stop 18 14 00 =0902+490 05 13 36 53.9 72.4 -3.9 0.0 103 541 18 12 01 18 14 00 SDSSJ0910+49 05 13 36 53.5 71.2 -4.0 0.0 -17 541 No stop 18 17 00 --- 05 16 37 53.9 71.6 -3.9 0.0 163 564 18 14 01 18 17 30 J0905+4850 05 17 07 54.4 72.9 -3.8 0.0 13 564 18 17 30 18 19 30 =0902+490 05 19 07 54.7 73.2 -3.8 0.0 120 580 18 17 31 18 19 30 SDSSJ0910+49 05 19 07 54.3 72.0 -3.9 0.0 -17 580 No stop 18 22 30 --- 05 22 08 54.7 72.4 -3.8 0.0 163 603 18 19 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 ---------------------------------------------------------------------------------------- --- Tue 28 Feb 2023 Day 59 --- 18 22 30 J0905+4850 05 22 08 55.2 73.6 -3.7 0.0 -17 603 No stop 18 24 30 =0902+490 05 24 08 55.5 73.9 -3.7 0.0 103 618 18 22 31 18 24 30 SDSSJ0910+49 05 24 08 55.0 72.7 -3.8 0.0 -17 618 No stop 18 27 30 --- 05 27 09 55.4 73.1 -3.7 0.0 163 642 18 24 31 18 28 00 J0905+4850 05 27 39 56.0 74.4 -3.7 0.0 13 642 18 28 00 18 30 00 =0902+490 05 29 39 56.3 74.7 -3.6 0.0 120 657 18 28 01 18 30 00 SDSSJ0910+49 05 29 39 55.8 73.4 -3.7 0.0 -17 657 No stop 18 33 00 --- 05 32 40 56.2 73.8 -3.6 0.0 163 680 18 30 01 18 33 00 J0905+4850 05 32 40 56.7 75.1 -3.6 0.0 -17 680 No stop 18 35 00 =0902+490 05 34 40 57.0 75.4 -3.5 0.0 103 696 18 33 01 18 35 00 SDSSJ0910+49 05 34 40 56.5 74.1 -3.6 0.0 -17 696 No stop 18 38 00 --- 05 37 40 56.9 74.5 -3.6 0.0 163 719 18 35 01 18 38 30 J0905+4850 05 38 10 57.5 75.9 -3.5 0.0 13 719 18 38 30 18 40 30 =0902+490 05 40 11 57.8 76.1 -3.4 0.0 120 734 18 38 31 18 40 30 SDSSJ0910+49 05 40 11 57.3 74.8 -3.5 0.0 -17 734 No stop 18 43 30 --- 05 43 11 57.7 75.3 -3.5 0.0 163 757 18 40 31 18 43 30 J0905+4850 05 43 11 58.2 76.6 -3.4 0.0 -17 757 No stop 18 45 30 =0902+490 05 45 12 58.5 76.9 -3.4 0.0 103 773 18 43 31 18 45 30 SDSSJ0910+49 05 45 12 58.0 75.5 -3.4 0.0 -17 773 No stop 18 48 30 --- 05 48 12 58.5 76.0 -3.4 0.0 163 796 18 45 31 18 49 00 J0905+4850 05 48 42 59.0 77.4 -3.3 0.0 13 796 18 49 00 18 51 00 =0902+490 05 50 42 59.3 77.7 -3.3 0.0 120 812 18 49 01 18 51 00 SDSSJ0910+49 05 50 42 58.8 76.3 -3.3 0.0 -17 812 No stop 18 54 00 --- 05 53 43 59.3 76.7 -3.3 0.0 163 835 18 51 01 18 54 00 J0905+4850 05 53 43 59.8 78.1 -3.2 0.0 -17 835 No stop 18 56 00 =0902+490 05 55 43 60.1 78.4 -3.2 0.0 103 850 18 54 01 18 57 00 J0927+3902 05 56 43 51.6 89.5 -3.5 0.0 14 850 18 57 00 19 02 00 =4C39.25 06 01 44 52.4 90.5 -3.4 0.0 300 889 18 57 01 19 03 00 J0905+4850 06 02 44 61.1 79.4 -3.1 0.0 14 889 19 03 00 19 08 00 =0902+490 06 07 45 61.9 80.2 -3.0 0.0 300 927 19 03 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 ---------------------------------------------------------------------------------------- --- Tue 28 Feb 2023 Day 59 --- 19 08 00 SDSSJ0910+49 06 07 45 61.3 78.7 -3.1 0.0 -17 927 No stop 19 11 00 --- 06 10 46 61.8 79.2 -3.0 0.0 163 951 19 08 01 19 11 30 J0905+4850 06 11 16 62.4 80.7 -2.9 0.0 13 951 19 11 30 19 13 30 =0902+490 06 13 16 62.7 81.0 -2.9 0.0 120 966 19 11 31 19 13 30 SDSSJ0910+49 06 13 16 62.2 79.6 -3.0 0.0 -17 966 No stop 19 16 30 --- 06 16 17 62.6 80.0 -2.9 0.0 163 989 19 13 31 19 16 30 J0905+4850 06 16 17 63.1 81.5 -2.8 0.0 -17 989 No stop 19 18 30 =0902+490 06 18 17 63.4 81.8 -2.8 0.0 103 1005 19 16 31 19 18 30 SDSSJ0910+49 06 18 17 62.9 80.3 -2.9 0.0 -17 1005 No stop 19 21 30 --- 06 21 17 63.4 80.8 -2.8 0.0 163 1028 19 18 31 19 22 00 J0905+4850 06 21 48 63.9 82.4 -2.8 0.0 13 1028 19 22 00 19 24 00 =0902+490 06 23 48 64.2 82.7 -2.7 0.0 120 1043 19 22 01 19 24 00 SDSSJ0910+49 06 23 48 63.7 81.1 -2.8 0.0 -17 1043 No stop 19 27 00 --- 06 26 48 64.2 81.6 -2.7 0.0 163 1067 19 24 01 19 27 00 J0905+4850 06 26 48 64.7 83.2 -2.7 0.0 -17 1067 No stop 19 29 00 =0902+490 06 28 49 65.0 83.5 -2.6 0.0 103 1082 19 27 01 19 29 00 SDSSJ0910+49 06 28 49 64.5 81.9 -2.7 0.0 -17 1082 No stop 19 32 00 --- 06 31 49 64.9 82.4 -2.7 0.0 163 1105 19 29 01 19 32 30 J0905+4850 06 32 19 65.5 84.1 -2.6 0.0 13 1105 19 32 30 19 34 30 =0902+490 06 34 20 65.8 84.4 -2.5 0.0 120 1121 19 32 31 19 34 30 SDSSJ0910+49 06 34 20 65.3 82.8 -2.6 0.0 -17 1121 No stop 19 37 30 --- 06 37 20 65.8 83.2 -2.6 0.0 163 1144 19 34 31 19 37 30 J0905+4850 06 37 20 66.3 84.9 -2.5 0.0 -17 1144 No stop 19 39 30 =0902+490 06 39 20 66.6 85.2 -2.5 0.0 103 1159 19 37 31 19 39 30 SDSSJ0910+49 06 39 20 66.1 83.6 -2.5 0.0 -17 1159 No stop 19 42 30 --- 06 42 21 66.5 84.1 -2.5 0.0 163 1183 19 39 31 19 43 00 J0905+4850 06 42 51 67.1 85.8 -2.4 0.0 13 1183 19 43 00 19 45 00 =0902+490 06 44 51 67.4 86.2 -2.4 0.0 120 1198 19 43 01 19 45 00 SDSSJ0910+49 06 44 51 66.9 84.5 -2.4 0.0 -17 1198 No stop 19 48 00 --- 06 47 52 67.3 85.0 -2.4 0.0 163 1221 19 45 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 ---------------------------------------------------------------------------------------- --- Tue 28 Feb 2023 Day 59 --- 19 48 00 J0905+4850 06 47 52 67.9 86.7 -2.3 0.0 -17 1221 No stop 19 50 00 =0902+490 06 49 52 68.2 87.1 -2.3 0.0 103 1237 19 48 01 19 50 00 SDSSJ0910+49 06 49 52 67.6 85.3 -2.4 0.0 -17 1237 No stop 19 53 00 --- 06 52 53 68.1 85.8 -2.3 0.0 163 1260 19 50 01 19 53 30 J0905+4850 06 53 23 68.7 87.7 -2.2 0.0 13 1260 19 53 30 19 55 30 =0902+490 06 55 23 69.0 88.1 -2.2 0.0 120 1275 19 53 31 19 55 30 SDSSJ0910+49 06 55 23 68.5 86.3 -2.3 0.0 -17 1275 No stop 19 58 30 --- 06 58 24 68.9 86.8 -2.2 0.0 163 1298 19 55 31 19 58 30 J0905+4850 06 58 24 69.4 88.7 -2.1 0.0 -17 1298 No stop 20 00 30 =0902+490 07 00 24 69.7 89.0 -2.1 0.0 103 1314 19 58 31 20 00 30 SDSSJ0910+49 07 00 24 69.2 87.1 -2.2 0.0 -17 1314 No stop 20 03 30 --- 07 03 24 69.7 87.7 -2.1 0.0 163 1337 20 00 31 20 04 00 J0905+4850 07 03 54 70.3 89.7 -2.1 0.0 13 1337 20 04 00 20 06 00 =0902+490 07 05 55 70.6 90.1 -2.0 0.0 120 1353 20 04 01 20 06 00 SDSSJ0910+49 07 05 55 70.0 88.1 -2.1 0.0 -17 1353 No stop 20 09 00 --- 07 08 55 70.5 88.7 -2.0 0.0 163 1376 20 06 01 20 09 00 J0905+4850 07 08 55 71.0 90.7 -2.0 0.0 -17 1376 No stop 20 11 00 =0902+490 07 10 56 71.3 91.2 -1.9 0.0 103 1391 20 09 01 20 11 00 SDSSJ0910+49 07 10 56 70.8 89.1 -2.0 0.0 -17 1391 No stop 20 14 00 --- 07 13 56 71.3 89.7 -2.0 0.0 163 1414 20 11 01 20 14 30 J0905+4850 07 14 26 71.9 91.9 -1.9 0.0 13 1414 20 14 30 20 16 30 =0902+490 07 16 27 72.2 92.3 -1.8 0.0 120 1430 20 14 31 20 16 30 SDSSJ0910+49 07 16 27 71.6 90.2 -1.9 0.0 -17 1430 No stop 20 19 30 --- 07 19 27 72.1 90.8 -1.9 0.0 163 1453 20 16 31 20 19 30 J0905+4850 07 19 27 72.6 93.0 -1.8 0.0 -17 1453 No stop 20 21 30 =0902+490 07 21 27 72.9 93.4 -1.8 0.0 103 1469 20 19 31 20 21 30 SDSSJ0910+49 07 21 27 72.4 91.2 -1.8 0.0 -17 1469 No stop 20 24 30 --- 07 24 28 72.8 91.8 -1.8 0.0 163 1492 20 21 31 20 25 00 J0905+4850 07 24 58 73.4 94.3 -1.7 0.0 13 1492 20 25 00 20 27 00 =0902+490 07 26 58 73.7 94.7 -1.7 0.0 120 1507 20 25 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 ---------------------------------------------------------------------------------------- --- Tue 28 Feb 2023 Day 59 --- 20 27 00 SDSSJ0910+49 07 26 58 73.2 92.4 -1.7 0.0 -17 1507 No stop 20 30 00 --- 07 29 59 73.7 93.1 -1.7 0.0 163 1530 20 27 01 20 30 00 J0905+4850 07 29 59 74.2 95.5 -1.6 0.0 -17 1530 No stop 20 32 00 =0902+490 07 31 59 74.5 96.0 -1.6 0.0 103 1546 20 30 01 20 32 00 SDSSJ0910+49 07 31 59 74.0 93.5 -1.7 0.0 -17 1546 No stop 20 35 00 --- 07 35 00 74.4 94.2 -1.6 0.0 163 1569 20 32 01 20 35 30 J0905+4850 07 35 30 75.0 96.9 -1.5 0.0 13 1569 20 35 30 20 37 30 =0902+490 07 37 30 75.3 97.5 -1.5 0.0 120 1584 20 35 31 20 37 30 SDSSJ0910+49 07 37 30 74.8 94.8 -1.6 0.0 -17 1584 No stop 20 40 30 --- 07 40 30 75.3 95.6 -1.5 0.0 163 1608 20 37 31 20 40 30 J0905+4850 07 40 30 75.8 98.3 -1.4 0.0 -17 1608 No stop 20 42 30 =0902+490 07 42 31 76.1 98.9 -1.4 0.0 103 1623 20 40 31 20 42 30 SDSSJ0910+49 07 42 31 75.6 96.1 -1.5 0.0 -17 1623 No stop 20 45 30 --- 07 45 31 76.0 96.9 -1.4 0.0 163 1646 20 42 31 20 46 00 J0905+4850 07 46 01 76.6 99.9 -1.4 0.0 13 1646 20 46 00 20 48 00 =0902+490 07 48 02 76.9 100.6 -1.3 0.0 120 1662 20 46 01 20 48 00 SDSSJ0910+49 07 48 02 76.4 97.6 -1.4 0.0 -17 1662 No stop 20 51 00 --- 07 51 02 76.8 98.5 -1.3 0.0 163 1685 20 48 01 20 51 00 J0905+4850 07 51 02 77.3 101.5 -1.3 0.0 -17 1685 No stop 20 53 00 =0902+490 07 53 03 77.6 102.2 -1.2 0.0 103 1700 20 51 01 20 54 00 J0927+3902 07 54 03 68.6 121.3 -1.6 0.0 14 1700 20 54 00 21 00 00 =4C39.25 08 00 04 69.4 123.8 -1.5 0.0 360 1747 20 54 01 SETUP FILE INFORMATION: NOTE: If DOPPLER, FREQ, or BW were used, see the individual scans for the final BBC settings. ======== Setup file: sess123.X2048 --- 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= 8012.00 8012.00 8012.00 8012.00 8012.00 8012.00 8012.00 8012.00 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: 1 Setup file default. Used with PCAL = off LO sum= 8383.49 8383.49 8383.49 8383.49 8447.49 8447.49 8447.49 8447.49 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: 1 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 39.460810 0.00 49 27 13.94852 * 49 15 00.25000 49 09 24.57117 0.00 From catalog imbedded in main SCHED input file. 0902+490 09 02 00.374037 * 09 05 27.463885 09 07 04.469886 0.15 * J0905+4850 49 02 49.85961 * 48 50 49.96508 48 45 20.86542 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 30.898934 0.31 * J0927+3902 39 15 23.56644 * 39 02 20.85185 38 56 20.17576 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.X2048 1 2 3 4 5 6 7 9 2.000 64.825 J0905+4850 sess123.X2048 1 2 3 4 5 6 7 9 1.500 50.127 J0927+3902 sess123.X2048 1 2 3 4 5 6 7 9 0.267 9.474 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+49 134.2 J0905+4850 134.1 J0927+3902 144.4 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