COVER INFORMATION Station: JODRELL1 (Code Jb ) 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 JODRELL1 (Code Jb ) 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: 4830.49 4830.49 4830.49 4830.49 4894.49 4894.49 4894.49 4894.49 4958.49 4958.49 4958.49 4958.49 5022.49 5022.49 5022.49 5022.49 Next BBC frequencies: 833.51 833.51 833.51 833.51 769.51 769.51 769.51 769.51 705.51 705.51 705.51 705.51 641.51 641.51 641.51 641.51 Next scan bandwidths: 32.00 32.00 32.00 32.00 32.00 32.00 32.00 32.00 32.00 32.00 32.00 32.00 32.00 32.00 32.00 32.00 16 30 00 J0927+3902 02 34 00 23.2 55.3 -6.9 -39.3 0 0 16 30 00 16 35 00 =4C39.25 02 39 01 23.8 56.1 -6.8 -39.7 300 77 16 30 01 16 36 00 J0905+4850 02 40 01 33.8 52.0 -6.5 -45.6 -27 77 16 36 00 16 41 00 =0902+490 02 45 02 34.4 52.7 -6.4 -46.2 273 155 16 36 01 16 41 00 SDSSJ0910+49 02 45 02 34.1 51.7 -6.4 -45.9 -18 155 No stop 16 44 00 --- 02 48 02 34.5 52.1 -6.4 -46.2 162 201 16 41 01 16 44 30 J0905+4850 02 48 32 34.8 53.1 -6.3 -46.6 12 201 16 44 30 16 46 30 =0902+490 02 50 33 35.0 53.4 -6.3 -46.8 120 232 16 44 31 16 46 30 SDSSJ0910+49 02 50 33 34.8 52.4 -6.4 -46.5 -18 232 No stop 16 49 30 --- 02 53 33 35.1 52.8 -6.3 -46.8 162 278 16 46 31 16 51 30 SDSSJ0910+49 02 55 33 35.3 53.1 -6.3 -47.1 112 278 16 51 30 16 54 30 --- 02 58 34 35.7 53.5 -6.2 -47.4 180 325 16 51 31 16 55 00 J0905+4850 02 59 04 36.1 54.6 -6.1 -47.7 11 325 16 55 00 16 57 00 =0902+490 03 01 04 36.3 54.9 -6.1 -47.9 120 356 16 55 01 16 57 00 SDSSJ0910+49 03 01 04 36.0 53.9 -6.2 -47.7 -18 356 No stop 17 00 00 --- 03 04 05 36.4 54.3 -6.1 -48.0 162 402 16 57 01 17 02 00 SDSSJ0910+49 03 06 05 36.6 54.5 -6.1 -48.2 112 402 17 02 00 17 05 00 --- 03 09 06 37.0 55.0 -6.0 -48.5 180 448 17 02 01 17 05 30 J0905+4850 03 09 36 37.4 56.0 -6.0 -48.8 11 448 17 05 30 17 07 30 =0902+490 03 11 36 37.6 56.3 -5.9 -49.0 120 479 17 05 31 17 07 30 SDSSJ0910+49 03 11 36 37.3 55.3 -6.0 -48.8 -18 479 No stop 17 10 30 --- 03 14 37 37.7 55.7 -6.0 -49.1 162 526 17 07 31 17 12 30 SDSSJ0910+49 03 16 37 37.9 56.0 -5.9 -49.3 112 526 17 12 30 17 15 30 --- 03 19 37 38.3 56.4 -5.9 -49.6 180 572 17 12 31 17 16 00 J0905+4850 03 20 07 38.7 57.5 -5.8 -49.9 11 572 17 16 00 17 18 00 =0902+490 03 22 08 38.9 57.7 -5.7 -50.1 120 603 17 16 01 Schedule for JODRELL1 (Code Jb ) 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 18 00 SDSSJ0910+49 03 22 08 38.6 56.7 -5.8 -49.9 -18 603 No stop 17 21 00 --- 03 25 08 39.0 57.1 -5.8 -50.2 162 649 17 18 01 17 23 00 SDSSJ0910+49 03 27 09 39.2 57.4 -5.7 -50.4 112 649 17 23 00 17 26 00 --- 03 30 09 39.6 57.8 -5.7 -50.7 180 696 17 23 01 17 26 30 J0905+4850 03 30 39 40.0 58.9 -5.6 -51.0 11 696 17 26 30 17 28 30 =0902+490 03 32 40 40.3 59.2 -5.6 -51.2 120 727 17 26 31 17 28 30 SDSSJ0910+49 03 32 40 39.9 58.1 -5.6 -51.0 -18 727 No stop 17 31 30 --- 03 35 40 40.3 58.5 -5.6 -51.3 162 773 17 28 31 17 33 30 SDSSJ0910+49 03 37 40 40.6 58.8 -5.6 -51.5 112 773 17 33 30 17 36 30 --- 03 40 41 41.0 59.2 -5.5 -51.8 180 819 17 33 31 17 37 00 J0905+4850 03 41 11 41.4 60.3 -5.4 -52.1 11 819 17 37 00 17 39 00 =0902+490 03 43 11 41.6 60.6 -5.4 -52.3 120 850 17 37 01 17 39 00 SDSSJ0910+49 03 43 11 41.3 59.5 -5.5 -52.1 -18 850 No stop 17 42 00 --- 03 46 12 41.7 59.9 -5.4 -52.4 162 897 17 39 01 17 44 00 SDSSJ0910+49 03 48 12 41.9 60.2 -5.4 -52.6 112 897 17 44 00 17 47 00 --- 03 51 13 42.3 60.6 -5.3 -52.9 180 943 17 44 01 17 47 30 J0905+4850 03 51 43 42.7 61.7 -5.3 -53.1 11 943 17 47 30 17 49 30 =0902+490 03 53 43 43.0 62.0 -5.2 -53.3 120 974 17 47 31 17 49 30 SDSSJ0910+49 03 53 43 42.6 60.9 -5.3 -53.1 -19 974 No stop 17 52 30 --- 03 56 43 43.0 61.4 -5.2 -53.4 161 1020 17 49 31 17 54 30 SDSSJ0910+49 03 58 44 43.3 61.6 -5.2 -53.6 112 1020 17 54 30 17 57 30 --- 04 01 44 43.7 62.0 -5.2 -53.9 180 1067 17 54 31 17 58 00 J0905+4850 04 02 14 44.1 63.2 -5.1 -54.1 11 1067 17 58 00 18 00 00 =0902+490 04 04 15 44.4 63.4 -5.0 -54.3 120 1098 17 58 01 18 00 00 SDSSJ0910+49 04 04 15 44.0 62.4 -5.1 -54.2 -19 1098 No stop 18 03 00 --- 04 07 15 44.4 62.8 -5.1 -54.5 161 1144 18 00 01 18 05 00 SDSSJ0910+49 04 09 16 44.7 63.0 -5.0 -54.6 112 1144 18 05 00 18 08 00 --- 04 12 16 45.1 63.4 -5.0 -54.9 180 1190 18 05 01 18 08 30 J0905+4850 04 12 46 45.6 64.6 -4.9 -55.1 11 1190 18 08 30 18 10 30 =0902+490 04 14 46 45.8 64.8 -4.9 -55.3 120 1221 18 08 31 Schedule for JODRELL1 (Code Jb ) 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 --- 18 10 30 SDSSJ0910+49 04 14 46 45.4 63.8 -4.9 -55.2 -19 1221 No stop 18 13 30 --- 04 17 47 45.8 64.2 -4.9 -55.4 161 1268 18 10 31 18 15 30 SDSSJ0910+49 04 19 47 46.1 64.4 -4.9 -55.6 112 1268 18 15 30 18 18 30 --- 04 22 48 46.5 64.8 -4.8 -55.9 180 1314 18 15 31 18 19 00 J0905+4850 04 23 18 47.0 66.0 -4.7 -56.0 11 1314 18 19 00 18 21 00 =0902+490 04 25 18 47.3 66.3 -4.7 -56.2 120 1345 18 19 01 18 21 00 SDSSJ0910+49 04 25 18 46.9 65.2 -4.8 -56.1 -19 1345 No stop 18 24 00 --- 04 28 19 47.3 65.6 -4.7 -56.4 161 1391 18 21 01 18 27 00 J0927+3902 04 31 19 39.0 74.5 -5.0 -47.9 104 1391 18 27 00 18 32 00 =4C39.25 04 36 20 39.7 75.4 -4.9 -48.1 300 1469 18 27 01 18 33 00 J0905+4850 04 37 20 48.9 67.9 -4.5 -57.3 -21 1469 18 33 00 18 38 00 =0902+490 04 42 21 49.6 68.6 -4.4 -57.7 279 1546 18 33 01 18 38 00 SDSSJ0910+49 04 42 21 49.2 67.4 -4.5 -57.7 -19 1546 No stop 18 41 00 --- 04 45 21 49.6 67.8 -4.4 -57.9 161 1592 18 38 01 18 41 30 J0905+4850 04 45 52 50.1 69.0 -4.4 -58.0 11 1592 18 41 30 18 43 30 =0902+490 04 47 52 50.4 69.3 -4.3 -58.1 120 1623 18 41 31 18 43 30 SDSSJ0910+49 04 47 52 50.0 68.2 -4.4 -58.2 -19 1623 No stop 18 46 30 --- 04 50 52 50.4 68.6 -4.3 -58.4 161 1669 18 43 31 18 48 30 SDSSJ0910+49 04 52 53 50.7 68.8 -4.3 -58.6 112 1669 18 48 30 18 51 30 --- 04 55 53 51.1 69.2 -4.3 -58.8 180 1716 18 48 31 18 52 00 J0905+4850 04 56 23 51.6 70.5 -4.2 -58.8 10 1716 18 52 00 18 54 00 =0902+490 04 58 24 51.9 70.8 -4.1 -59.0 120 1747 18 52 01 18 54 00 SDSSJ0910+49 04 58 24 51.4 69.6 -4.2 -59.1 -19 1747 No stop 18 57 00 --- 05 01 24 51.8 70.0 -4.2 -59.3 161 1793 18 54 01 18 59 00 SDSSJ0910+49 05 03 24 52.1 70.3 -4.1 -59.5 112 1793 18 59 00 19 02 00 --- 05 06 25 52.6 70.7 -4.1 -59.7 180 1840 18 59 01 19 02 30 J0905+4850 05 06 55 53.1 71.9 -4.0 -59.7 10 1840 19 02 30 19 04 30 =0902+490 05 08 55 53.4 72.2 -4.0 -59.8 120 1870 19 02 31 19 04 30 SDSSJ0910+49 05 08 55 52.9 71.0 -4.0 -59.9 -19 1870 No stop 19 07 30 --- 05 11 56 53.3 71.4 -4.0 -60.2 161 1917 19 04 31 Schedule for JODRELL1 (Code Jb ) 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 --- 19 09 30 SDSSJ0910+49 05 13 56 53.6 71.7 -4.0 -60.3 112 1917 19 09 30 19 12 30 --- 05 16 57 54.0 72.1 -3.9 -60.6 180 1963 19 09 31 19 13 00 J0905+4850 05 17 27 54.6 73.4 -3.8 -60.5 10 1963 19 13 00 19 15 00 =0902+490 05 19 27 54.9 73.7 -3.8 -60.6 120 1994 19 13 01 19 15 00 SDSSJ0910+49 05 19 27 54.4 72.4 -3.9 -60.8 -20 1994 No stop 19 18 00 --- 05 22 28 54.8 72.9 -3.8 -61.0 160 2040 19 15 01 19 20 00 SDSSJ0910+49 05 24 28 55.1 73.1 -3.8 -61.1 112 2040 19 20 00 19 23 00 --- 05 27 28 55.6 73.6 -3.7 -61.4 180 2087 19 20 01 19 23 30 J0905+4850 05 27 58 56.1 74.9 -3.7 -61.2 10 2087 19 23 30 19 25 30 =0902+490 05 29 59 56.4 75.2 -3.6 -61.4 120 2118 19 23 31 19 25 30 SDSSJ0910+49 05 29 59 55.9 73.9 -3.7 -61.6 -20 2118 No stop 19 28 30 --- 05 32 59 56.3 74.3 -3.6 -61.8 160 2164 19 25 31 19 30 30 SDSSJ0910+49 05 35 00 56.6 74.6 -3.6 -61.9 112 2164 19 30 30 19 33 30 --- 05 38 00 57.1 75.0 -3.6 -62.1 180 2211 19 30 31 19 34 00 J0905+4850 05 38 30 57.6 76.4 -3.5 -61.9 10 2211 19 34 00 19 36 00 =0902+490 05 40 30 57.9 76.7 -3.4 -62.1 120 2241 19 34 01 19 36 00 SDSSJ0910+49 05 40 30 57.4 75.4 -3.5 -62.3 -20 2241 No stop 19 39 00 --- 05 43 31 57.9 75.8 -3.5 -62.5 160 2288 19 36 01 19 41 00 SDSSJ0910+49 05 45 31 58.2 76.1 -3.4 -62.7 112 2288 19 41 00 19 44 00 --- 05 48 32 58.6 76.5 -3.4 -62.9 180 2334 19 41 01 19 44 30 J0905+4850 05 49 02 59.2 77.9 -3.3 -62.6 9 2334 19 44 30 19 46 30 =0902+490 05 51 02 59.4 78.2 -3.3 -62.7 120 2365 19 44 31 19 46 30 SDSSJ0910+49 05 51 02 59.0 76.9 -3.3 -63.0 -20 2365 No stop 19 49 30 --- 05 54 03 59.4 77.3 -3.3 -63.2 160 2411 19 46 31 19 51 30 SDSSJ0910+49 05 56 03 59.7 77.6 -3.3 -63.4 112 2411 19 51 30 19 54 30 --- 05 59 04 60.1 78.0 -3.2 -63.5 180 2458 19 51 31 19 55 00 J0905+4850 05 59 34 60.7 79.5 -3.1 -63.2 9 2458 19 55 00 19 57 00 =0902+490 06 01 34 61.0 79.8 -3.1 -63.3 120 2489 19 55 01 19 57 00 SDSSJ0910+49 06 01 34 60.5 78.4 -3.2 -63.7 -21 2489 No stop 20 00 00 --- 06 04 34 60.9 78.8 -3.1 -63.9 159 2535 19 57 01 Schedule for JODRELL1 (Code Jb ) 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 --- 20 02 00 SDSSJ0910+49 06 06 35 61.2 79.1 -3.1 -64.0 112 2535 20 02 00 20 05 00 --- 06 09 35 61.7 79.6 -3.0 -64.2 180 2582 20 02 01 20 05 30 J0905+4850 06 10 05 62.3 81.1 -2.9 -63.8 9 2582 20 05 30 20 07 30 =0902+490 06 12 06 62.6 81.5 -2.9 -63.9 120 2612 20 05 31 20 07 30 SDSSJ0910+49 06 12 06 62.0 80.0 -3.0 -64.3 -21 2612 No stop 20 10 30 --- 06 15 06 62.5 80.4 -2.9 -64.5 159 2659 20 07 31 20 12 30 SDSSJ0910+49 06 17 06 62.8 80.7 -2.9 -64.6 112 2659 20 12 30 20 15 30 --- 06 20 07 63.2 81.2 -2.9 -64.7 180 2705 20 12 31 20 16 00 J0905+4850 06 20 37 63.8 82.8 -2.8 -64.3 8 2705 20 16 00 20 18 00 =0902+490 06 22 37 64.1 83.1 -2.7 -64.3 120 2736 20 16 01 20 18 00 SDSSJ0910+49 06 22 37 63.6 81.6 -2.8 -64.9 -21 2736 No stop 20 21 00 --- 06 25 38 64.0 82.1 -2.8 -65.0 159 2782 20 18 01 20 24 00 J0927+3902 06 28 38 56.4 96.7 -3.0 -49.8 107 2782 20 24 00 20 30 00 =4C39.25 06 34 39 57.3 98.1 -2.9 -49.6 360 2875 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: 2 Station: JODRELL1 Total bit rate: 2048 Format: VDIF Bits per sample: 2 Sample rate: 64.000 Number of channels: 16 DBE type: DBBC_DDC Speedup factor: 1.00 Disk used to record data. 1st LO= 5664.00 5664.00 5664.00 5664.00 5664.00 5664.00 5664.00 5664.00 5664.00 5664.00 5664.00 5664.00 5664.00 5664.00 5664.00 5664.00 Net SB= L L U U L L U U L L U U L L U U IF SB = L L L L L L L L L L L L L L L L Pol. = RCP LCP RCP LCP RCP LCP RCP LCP RCP LCP RCP LCP RCP LCP RCP LCP BBC = 1 9 1 9 2 10 2 10 3 11 3 11 4 12 4 12 BBC SB= U U L L U U L L U U L L U U L L IF = A1 B1 A1 B1 A1 B1 A1 B1 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= 4830.49 4830.49 4830.49 4830.49 4894.49 4894.49 4894.49 4894.49 4958.49 4958.49 4958.49 4958.49 5022.49 5022.49 5022.49 5022.49 BBC fr= 833.51 833.51 833.51 833.51 769.51 769.51 769.51 769.51 705.51 705.51 705.51 705.51 641.51 641.51 641.51 641.51 Bandwd= 32.00 32.00 32.00 32.00 32.00 32.00 32.00 32.00 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, 9, 10, 11, 12, 13, 14, 15, 16 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