COVER INFORMATION Station: HART (Code Hh ) Experiment: Varstrometry selected dual-Quasar candidates Exp. Code: EX010B Schedule Version: 2.00 Processed by SCHED version: 11.60 Release 11.6; April 2020 PI: Wancheng Xu Address: Xinjiang Astronomical Observatory, CAS 150 Science-1 Street Urumqi China Phone: +8615141589572 EMAIL: xuwancheng@xao.ac.cn Fax: Phone during observation: +8615141589572 Observing mode: vlbi Notes: # Please, make sure PHASE CAL is OFF # COVER LETTER: The coordinates of calibrators are from Astrogeo Database (rfc_2023c). Schedule for HART (Code Hh ) Page 2 Varstrometry selected dual-Quasar candidates 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 ---------------------------------------------------------------------------------------- --- Sat 25 May 2024 Day 146 --- Next scan frequencies: 1626.49 1626.49 1626.49 1626.49 1690.49 1690.49 1690.49 1690.49 Next BBC frequencies: 116.49 116.49 116.49 116.49 180.49 180.49 180.49 180.49 Next scan bandwidths: 32.00 32.00 32.00 32.00 32.00 32.00 32.00 32.00 14 30 00 J0927+3902 08 35 25 24.0 11.3 -0.9 0.0 0 0 14 30 00 14 35 00 --- 08 40 25 24.2 10.2 -0.8 0.0 300 39 14 30 01 14 36 10 J0941+4336 08 41 36 19.2 11.7 -1.0 0.0 34 39 14 36 10 14 38 40 --- 08 44 06 19.3 11.2 -1.0 0.0 150 58 14 36 11 14 39 20 J0950+4329S 08 44 46 19.0 12.9 -1.1 0.0 9 58 14 39 20 14 46 00 --- 08 51 27 19.3 11.6 -1.0 0.0 400 109 14 39 21 14 46 40 J0941+4336 08 52 07 19.6 9.7 -0.8 0.0 8 109 14 46 40 14 48 40 --- 08 54 08 19.7 9.3 -0.8 0.0 120 125 14 46 41 14 49 20 J0950+4329S 08 54 48 19.5 11.0 -1.0 0.0 9 125 14 49 20 14 56 00 --- 09 01 29 19.8 9.7 -0.8 0.0 400 176 14 49 21 14 56 40 J0941+4336 09 02 09 20.0 7.8 -0.7 0.0 8 176 14 56 40 14 58 40 --- 09 04 09 20.0 7.4 -0.6 0.0 120 192 14 56 41 14 59 20 J0950+4329S 09 04 49 19.9 9.1 -0.8 0.0 9 192 14 59 20 15 06 00 --- 09 11 30 20.1 7.8 -0.7 0.0 400 243 14 59 21 15 06 40 J0941+4336 09 12 11 20.2 5.9 -0.5 0.0 8 243 15 06 40 15 08 40 --- 09 14 11 20.3 5.5 -0.5 0.0 120 259 15 06 41 15 09 20 J0950+4329S 09 14 51 20.2 7.2 -0.6 0.0 9 259 15 09 20 15 16 00 --- 09 21 32 20.4 5.9 -0.5 0.0 400 310 15 09 21 15 16 40 J0941+4336 09 22 12 20.4 4.0 -0.3 0.0 8 310 15 16 40 15 18 40 --- 09 24 13 20.5 3.6 -0.3 0.0 120 326 15 16 41 15 19 20 J0950+4329S 09 24 53 20.5 5.3 -0.5 0.0 9 326 15 19 20 15 26 00 --- 09 31 34 20.6 4.0 -0.3 0.0 400 377 15 19 21 15 26 40 J0941+4336 09 32 14 20.6 2.0 -0.2 0.0 8 377 15 26 40 15 28 40 --- 09 34 14 20.6 1.7 -0.1 0.0 120 393 15 26 41 15 29 20 J0950+4329S 09 34 54 20.6 3.3 -0.3 0.0 9 393 15 29 20 15 36 00 --- 09 41 35 20.7 2.0 -0.2 0.0 400 444 15 29 21 15 36 40 J0941+4336 09 42 16 20.6 0.1 -0.0 0.0 8 444 15 36 40 15 38 40 --- 09 44 16 20.6 359.7 0.0 0.0 120 460 15 36 41 Schedule for HART (Code Hh ) Page 3 Varstrometry selected dual-Quasar candidates 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 ---------------------------------------------------------------------------------------- --- Sat 25 May 2024 Day 146 --- 15 39 30 J0950+4329S 09 45 06 20.7 1.3 -0.1 0.0 19 460 15 39 30 15 45 50 --- 09 51 27 20.7 0.1 -0.0 0.0 380 509 15 39 31 15 46 40 J0941+4336 09 52 17 20.6 358.2 0.2 0.0 18 509 15 46 40 15 48 40 --- 09 54 17 20.6 357.8 0.2 0.0 120 524 15 46 41 15 49 30 J0950+4329S 09 55 08 20.7 359.4 0.1 0.0 19 524 15 49 30 15 55 50 --- 10 01 29 20.7 358.2 0.2 0.0 380 573 15 49 31 15 56 40 J0941+4336 10 02 19 20.5 356.2 0.3 0.0 18 573 15 56 40 15 58 40 --- 10 04 19 20.4 355.8 0.4 0.0 120 589 15 56 41 15 59 30 J0950+4329S 10 05 09 20.7 357.5 0.2 0.0 19 589 15 59 30 16 05 50 --- 10 11 30 20.6 356.2 0.3 0.0 380 638 15 59 31 16 06 40 J0941+4336 10 12 20 20.3 354.3 0.5 0.0 18 638 16 06 40 16 08 40 --- 10 14 21 20.2 353.9 0.5 0.0 120 653 16 06 41 16 09 30 J0950+4329S 10 15 11 20.5 355.5 0.4 0.0 19 653 16 09 30 16 15 50 --- 10 21 32 20.4 354.3 0.5 0.0 380 702 16 09 31 16 16 40 J0941+4336 10 22 22 20.0 352.4 0.7 0.0 18 702 16 16 40 16 18 40 --- 10 24 22 20.0 352.0 0.7 0.0 120 718 16 16 41 16 19 50 J0950+4329S 10 25 33 20.3 353.5 0.6 0.0 39 718 16 19 50 16 26 10 --- 10 31 54 20.1 352.3 0.7 0.0 380 766 16 19 51 16 27 20 J0941+4336 10 33 04 19.7 350.4 0.8 0.0 38 766 16 27 20 16 29 20 --- 10 35 04 19.6 350.0 0.9 0.0 120 782 16 27 21 16 30 30 J0950+4329S 10 36 14 20.0 351.5 0.7 0.0 39 782 16 30 30 16 36 50 --- 10 42 35 19.8 350.3 0.8 0.0 380 831 16 30 31 16 38 00 J0941+4336 10 43 46 19.2 348.4 1.0 0.0 38 831 16 38 00 16 40 00 --- 10 45 46 19.1 348.0 1.0 0.0 120 846 16 38 01 16 41 10 J0950+4329S 10 46 56 19.6 349.5 0.9 0.0 39 846 16 41 10 16 47 30 --- 10 53 17 19.3 348.3 1.0 0.0 380 895 16 41 11 16 48 40 J0941+4336 10 54 27 18.7 346.4 1.2 0.0 38 895 16 48 40 16 50 40 --- 10 56 28 18.6 346.0 1.2 0.0 120 911 16 48 41 16 51 50 J0950+4329S 10 57 38 19.1 347.5 1.1 0.0 39 911 16 51 50 16 58 10 --- 11 03 59 18.8 346.3 1.2 0.0 380 960 16 51 51 Schedule for HART (Code Hh ) Page 4 Varstrometry selected dual-Quasar candidates 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 ---------------------------------------------------------------------------------------- --- Sat 25 May 2024 Day 146 --- 16 59 20 J0941+4336 11 05 09 18.1 344.4 1.4 0.0 38 960 16 59 20 17 01 20 --- 11 07 09 18.0 344.1 1.4 0.0 120 975 16 59 21 17 02 30 J0950+4329S 11 08 20 18.6 345.5 1.3 0.0 39 975 17 02 30 17 08 50 --- 11 14 41 18.2 344.3 1.4 0.0 380 1024 17 02 31 17 10 00 J0941+4336 11 15 51 17.4 342.5 1.6 0.0 38 1024 17 10 00 17 12 00 --- 11 17 51 17.3 342.2 1.6 0.0 120 1040 17 10 01 17 13 10 J0950+4329S 11 19 01 17.9 343.6 1.4 0.0 39 1040 17 13 10 17 19 30 --- 11 25 22 17.5 342.4 1.6 0.0 380 1089 17 13 11 17 20 40 J0941+4336 11 26 33 16.6 340.7 1.7 0.0 38 1089 17 20 40 17 22 40 --- 11 28 33 16.5 340.3 1.8 0.0 120 1104 17 20 41 17 23 50 J0950+4329S 11 29 43 17.2 341.7 1.6 0.0 39 1104 17 23 50 17 30 10 --- 11 36 04 16.7 340.6 1.7 0.0 380 1153 17 23 51 17 31 20 J0941+4336 11 37 14 15.8 338.8 1.9 0.0 38 1153 17 31 20 17 33 20 --- 11 39 15 15.6 338.5 1.9 0.0 120 1168 17 31 21 17 34 30 J0950+4329S 11 40 25 16.4 339.8 1.8 0.0 39 1168 17 34 30 17 40 50 --- 11 46 46 15.9 338.7 1.9 0.0 380 1217 17 34 31 17 42 00 J0941+4336 11 47 56 14.9 337.1 2.1 0.0 38 1217 17 42 00 17 44 00 --- 11 49 56 14.7 336.7 2.1 0.0 120 1233 17 42 01 17 44 55 J0950+4329S 11 50 52 15.6 338.0 2.0 0.0 24 1233 17 44 55 17 51 05 --- 11 57 03 15.0 337.0 2.1 0.0 370 1280 17 44 56 17 52 00 J0941+4336 11 57 58 14.0 335.4 2.3 0.0 23 1280 17 52 00 17 54 00 --- 11 59 58 13.8 335.1 2.3 0.0 120 1296 17 52 01 17 54 55 J0950+4329S 12 00 53 14.7 336.4 2.1 0.0 24 1296 17 54 55 18 01 05 --- 12 07 04 14.1 335.4 2.3 0.0 370 1344 17 54 56 18 02 00 J0941+4336 12 07 59 13.0 333.9 2.4 0.0 23 1344 18 02 00 18 04 00 --- 12 10 00 12.8 333.5 2.5 0.0 120 1359 18 02 01 18 04 55 J0950+4329S 12 10 55 13.7 334.8 2.3 0.0 24 1359 18 04 55 18 11 05 --- 12 17 06 13.1 333.8 2.4 0.0 370 1407 18 04 56 18 12 00 J0941+4336 12 18 01 12.0 332.3 2.6 0.0 23 1407 18 12 00 18 14 00 --- 12 20 01 11.8 332.0 2.6 0.0 120 1422 18 12 01 Schedule for HART (Code Hh ) Page 5 Varstrometry selected dual-Quasar candidates 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 ---------------------------------------------------------------------------------------- --- Sat 25 May 2024 Day 146 --- 18 14 55 J0950+4329S 12 20 57 12.8 333.2 2.5 0.0 24 1422 18 14 55 18 21 05 --- 12 27 08 12.1 332.3 2.6 0.0 370 1470 18 14 56 18 22 00 J0941+4336 12 28 03 10.9 330.8 2.8 0.0 23 1470 18 22 00 18 24 00 --- 12 30 03 10.7 330.5 2.8 0.0 120 1485 18 22 01 18 24 45 J0950+4329S 12 30 48 11.7 331.7 2.6 0.0 14 1485 18 24 45 18 31 15 --- 12 37 19 11.0 330.7 2.8 0.0 390 1536 18 24 46 18 32 00 J0941+4336 12 38 04 9.8 329.4 2.9 0.0 13 1536 18 32 00 18 34 00 --- 12 40 05 9.6 329.1 3.0 0.0 120 1551 18 32 01 18 34 45 J0950+4329S 12 40 50 10.6 330.2 2.8 0.0 14 1551 18 34 45 18 41 15 --- 12 47 21 9.9 329.3 2.9 0.0 390 1601 18 34 46 19 25 00 J0956+2515 13 31 13 17.6 310.5 3.6 0.0 2561 1601 19 25 00 19 30 00 =OK290 13 36 14 16.7 309.7 3.6 0.0 300 1640 19 25 01 SETUP FILE INFORMATION: NOTE: If DOPPLER, FREQ, or BW were used, see the individual scans for the final BBC settings. ======== Setup file: sess224.L1024 Matching groups in /home/guest/rmc/SCHED/sched11.6/catalogs/freq_RDBE.dat: hh18cm Values confirmed by E-mail Jonathan Quick 20140219 (CR) ****** Only 122.49 of 256.00 MHz total bandwidth is within the IFs in the setup file before any FREQ or DOPPLER shifts. Setup group: 5 Station: HART 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= 1510.00 1510.00 1510.00 1510.00 1510.00 1510.00 1510.00 1510.00 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 C1 A1 C1 A1 C1 A1 C1 The following frequency sets based on these setups were used. Frequency Set: 8 Setup file default. Used with PCAL = off LO sum= 1626.49 1626.49 1626.49 1626.49 1690.49 1690.49 1690.49 1690.49 BBC fr= 116.49 116.49 116.49 116.49 180.49 180.49 180.49 180.49 Bandwd= 32.00 32.00 32.00 32.00 32.00 32.00 32.00 32.00 Matching frequency sets: 8 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) * J0950+4329S 09 47 23.456394 * 09 50 31.630000 09 52 02.913973 0.00 43 43 10.80497 * 43 29 08.26000 43 22 31.49947 0.00 From catalog imbedded in main SCHED input file. * J0927+3902 09 23 55.319223 * 09 27 03.013944 09 28 33.880359 0.00 39 15 23.56637 * 39 02 20.85177 38 56 11.90638 0.00 From catalog imbedded in main SCHED input file. * J0941+4336 09 38 06.240392 * 09 41 16.707942 09 42 49.023018 0.00 43 50 29.00062 * 43 36 49.06097 43 30 23.32098 0.00 From catalog imbedded in main SCHED input file. OK290 09 53 59.738482 * 09 56 49.875376 09 58 12.440319 0.41 * J0956+2515 25 29 33.58581 * 25 15 16.04991 25 08 26.43478 0.37 0953+254 /home/guest/rmc/SCHED/sched11.6/catalogs/sources.gsfc J0956+25 GSFC 2016a X/S astro solution, 26975 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 J0950+4329Ssess224.L1024 1 2 3 4 5 6 7 8 9 10 2.994 264.109 J0927+3902 sess224.L1024 1 2 3 4 5 6 7 8 9 10 0.083 7.583 J0941+4336 sess224.L1024 1 2 3 4 5 6 7 8 9 10 0.975 86.032 J0956+2515 sess224.L1024 1 2 3 4 6 7 8 9 10 0.083 5.447 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) J0950+4329S 72.1 J0927+3902 68.7 J0941+4336 70.5 J0956+2515 78.2 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