COVER INFORMATION Station: URUMQI (Code Ur ) Experiment: 18cm global VLBI observations of Arp220 Exp. Code: GV022A Schedule Version: 5.00 Processed by SCHED version: 11.40 Release 11.4. March 14, 2015 PI: Eskil Varenius Address: Department of Earth and Space Sciences, Chalmers University of T Onsala Space Observatory 439 92 Onsala Sweden Phone: +46 31 772 55 45 EMAIL: varenius@chalmers.se Fax: +46(0)31 772 5590 Phone during observation: +46 31 772 55 45 Observing mode: 18cm 2Gbps global VLBI with phased D-array VLA Notes: Phase calibrator : J1532+2344 Fringe finder / pol. cal / bandpass cal : J1516+1932 VLA phase-up calibrator: J1520+2016 (3C318) Schedule for URUMQI (Code Ur ) Page 2 18cm global VLBI observations of Arp220 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 ---------------------------------------------------------------------------------------- --- Sun 26 Feb 2017 Day 57 --- Next scan frequencies: 1584.25 1584.25 1584.25 1584.25 1616.25 1616.25 1616.25 1616.25 1648.25 1648.25 1648.25 1648.25 1680.25 1680.25 1680.25 1680.25 Next BBC frequencies: 284.25 284.25 284.25 284.25 316.25 316.25 316.25 316.25 348.25 348.25 348.25 348.25 380.25 380.25 380.25 380.25 Next scan bandwidths: 16.00 16.00 16.00 16.00 16.00 16.00 16.00 16.00 16.00 16.00 16.00 16.00 16.00 16.00 16.00 16.00 03 30 00 J1532+2344 19 43 25 35.7 270.0 4.2 52.4 0 0 03 30 00 03 33 00 =1530+239 19 46 26 35.1 270.5 4.2 52.4 180 23 03 30 04 03 33 25 ARP220 19 46 51 35.3 270.0 4.2 52.3 21 23 03 33 25 03 43 25 --- 19 56 53 33.5 271.7 4.4 52.2 600 100 03 33 29 03 43 51 J1532+2344 19 57 19 33.2 272.4 4.4 52.3 21 100 03 43 51 03 46 51 =1530+239 20 00 19 32.6 272.9 4.4 52.3 180 123 03 43 55 03 47 17 ARP220 20 00 45 32.8 272.4 4.4 52.2 21 123 03 47 17 03 57 17 --- 20 10 46 31.0 274.0 4.6 52.1 600 200 03 47 21 03 57 42 J1532+2344 20 11 12 30.7 274.7 4.6 52.2 22 200 03 57 42 04 00 42 =1530+239 20 14 13 30.1 275.2 4.7 52.1 180 223 03 57 46 04 01 08 ARP220 20 14 38 30.3 274.7 4.6 52.0 21 223 04 01 08 04 11 08 --- 20 24 40 28.5 276.3 4.8 51.8 600 300 04 01 12 04 11 33 J1532+2344 20 25 06 28.1 276.9 4.9 51.9 22 300 04 11 33 04 14 33 =1530+239 20 28 06 27.6 277.4 4.9 51.8 180 323 04 11 37 04 14 59 ARP220 20 28 32 27.8 276.9 4.9 51.7 21 323 04 14 59 04 24 59 --- 20 38 33 26.0 278.5 5.0 51.5 600 400 04 15 03 04 25 52 J1516+1932 20 39 27 20.1 278.2 5.4 49.6 39 400 04 25 52 04 27 52 =1514+197 20 41 27 19.7 278.5 5.4 49.6 120 415 04 25 56 04 28 40 J1532+2344 20 42 15 25.1 279.6 5.1 51.4 34 415 04 28 40 04 31 40 =1530+239 20 45 15 24.5 280.1 5.2 51.3 180 438 04 28 44 04 32 05 ARP220 20 45 41 24.7 279.6 5.2 51.2 21 438 04 32 05 04 42 05 --- 20 55 42 22.9 281.2 5.3 50.9 600 515 04 32 09 04 42 31 J1532+2344 20 56 08 22.6 281.8 5.4 50.9 22 515 04 42 31 04 45 31 =1530+239 20 59 09 22.1 282.3 5.4 50.7 180 538 04 42 35 04 45 56 ARP220 20 59 34 22.2 281.8 5.4 50.7 21 538 04 45 56 04 55 56 --- 21 09 36 20.4 283.4 5.6 50.3 600 615 04 46 00 Schedule for URUMQI (Code Ur ) Page 3 18cm global VLBI observations of Arp220 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 ---------------------------------------------------------------------------------------- --- Sun 26 Feb 2017 Day 57 --- 04 56 22 J1532+2344 21 10 02 20.1 284.0 5.6 50.3 22 615 04 56 22 04 59 22 =1530+239 21 13 02 19.6 284.5 5.7 50.1 180 638 04 56 26 04 59 47 ARP220 21 13 28 19.8 284.0 5.6 50.1 21 638 04 59 47 05 09 47 --- 21 23 29 18.0 285.6 5.8 49.6 600 715 04 59 51 05 10 13 J1532+2344 21 23 55 17.7 286.2 5.8 49.6 22 715 05 10 13 05 13 13 =1530+239 21 26 55 17.2 286.6 5.9 49.4 180 738 05 10 17 05 13 38 ARP220 21 27 21 17.3 286.2 5.9 49.4 21 738 05 13 38 05 23 38 --- 21 37 23 15.6 287.7 6.0 48.9 600 815 05 13 42 05 24 25 J1516+1932 21 38 09 9.7 287.7 6.3 47.2 32 815 05 24 25 05 26 25 =1514+197 21 40 10 9.4 288.0 6.4 47.1 120 831 05 24 29 05 27 10 J1532+2344 21 40 55 14.8 288.8 6.1 48.6 31 831 05 27 10 05 30 10 =1530+239 21 43 56 14.2 289.3 6.2 48.4 180 854 05 27 14 05 30 36 ARP220 21 44 21 14.4 288.8 6.1 48.5 21 854 05 30 36 05 40 36 --- 21 54 23 12.7 290.4 6.3 47.8 600 931 05 30 40 05 41 01 J1532+2344 21 54 48 12.4 291.0 6.4 47.7 22 931 05 41 01 05 44 01 =1530+239 21 57 49 11.9 291.5 6.4 47.5 180 954 05 41 05 05 44 27 ARP220 21 58 14 12.0 291.0 6.4 47.6 21 954 05 44 27 05 54 27 --- 22 08 16 10.3 292.6 6.5 46.9 600 1031 05 44 31 05 54 53 J1532+2344 22 08 42 10.1 293.2 6.6 46.8 22 1031 05 54 53 05 57 53 =1530+239 22 11 42 9.6 293.7 6.6 46.5 180 1054 05 54 57 05 58 18 ARP220 22 12 08 9.7 293.2 6.6 46.6 21 1054 05 58 18 06 08 18 --- 22 22 09 8.0 294.8 6.8 45.9 600 1131 05 58 22 06 08 44 J1532+2344 22 22 35 7.8 295.4 6.8 45.7 22 1131 06 08 44 06 11 44 =1530+239 22 25 36 7.3 295.9 6.9 45.5 180 1154 06 08 48 06 12 09 ARP220 22 26 01 7.4 295.5 6.8 45.6 21 1154 06 12 09 06 22 09 --- 22 36 03 5.8 297.1 7.0 44.8 600 1231 06 12 13 SETUP FILE INFORMATION: NOTE: If DOPPLER, FREQ, or BW were used, see the individual scans for the final BBC settings. ======== Setup file: sess117.L2048glob Matching groups in /home/guest/rmc/SCHED/sched11.4/catalogs/freq_RDBE.dat: ur18cm update L.Xiang 9Feb05 Setup group: 12 Station: URUMQI Total bit rate: 1024 Format: MARK5B Bits per sample: 2 Sample rate: 32.000 Number of channels: 16 DBE type: Speedup factor: 1.00 Disk used to record data. 1st LO= 1300.00 1300.00 1300.00 1300.00 1300.00 1300.00 1300.00 1300.00 1300.00 1300.00 1300.00 1300.00 1300.00 1300.00 1300.00 1300.00 Net SB= L L U U L L U U L L U U L L U U IF SB = U U U U U U U U U U U U U U U U Pol. = RCP LCP RCP LCP RCP LCP RCP LCP RCP LCP RCP LCP RCP LCP RCP LCP BBC = 2 1 2 1 4 3 4 3 6 5 6 5 8 7 8 7 BBC SB= L L U U L L U U L L U U L L U U IF = 2N 1N 2N 1N 2N 1N 2N 1N 2N 1N 2N 1N 2N 1N 2N 1N The following frequency sets based on these setups were used. Frequency Set: 6 Setup file default. Used with PCAL = off LO sum= 1584.25 1584.25 1584.25 1584.25 1616.25 1616.25 1616.25 1616.25 1648.25 1648.25 1648.25 1648.25 1680.25 1680.25 1680.25 1680.25 BBC fr= 284.25 284.25 284.25 284.25 316.25 316.25 316.25 316.25 348.25 348.25 348.25 348.25 380.25 380.25 380.25 380.25 Bandwd= 16.00 16.00 16.00 16.00 16.00 16.00 16.00 16.00 16.00 16.00 16.00 16.00 16.00 16.00 16.00 16.00 Matching frequency sets: 6 Track assignments are: track1= 20, 18, 4, 2, 24, 22, 8, 6, 28, 26, 12, 10, 32, 30, 16, 14 barrel=roll_off POSITIONS OF SOURCES USED IN RECORDING SCANS Source Source position (RA/Dec) Error (B1950) (J2000) (Date) (mas) * 3C318 15 17 50.628003 * 15 20 05.489700 15 20 51.619460 0.00 20 26 53.10030 * 20 16 05.61100 20 12 19.37298 0.00 From catalog imbedded in main SCHED input file. Pos. from https://science.nrao.edu/facilities/vla/observing/callist#R15 * ARP220 15 32 46.905485 * 15 34 57.250000 15 35 41.749984 0.00 23 40 07.75728 * 23 30 11.33000 23 26 41.88094 0.00 From catalog imbedded in main SCHED input file. Pos. from Batejat. et al 2011 * 3C286 13 28 49.657758 * 13 31 08.288051 13 31 56.137992 0.18 J1331+3030 30 45 58.64059 * 30 30 32.95924 30 25 07.99101 0.17 1328+307 /home/guest/rmc/SCHED/sched11.4/catalogs/sources.gsfc J1331+30 GSFC 2015a astro solution, unpublished 225 observations. 1514+197 15 14 40.985840 * 15 16 56.796162 15 17 43.268587 0.01 * J1516+1932 19 43 10.94252 * 19 32 12.99209 19 28 23.33097 0.02 J1516+19 /home/guest/rmc/SCHED/sched11.4/catalogs/sources.gsfc GSFC 2015a astro solution, unpublished 2699 observations. 1530+239 15 30 36.092767 * 15 32 46.345222 15 33 30.823776 0.10 * J1532+2344 23 54 09.32921 * 23 44 05.26804 23 40 33.11927 0.17 /home/guest/rmc/SCHED/sched11.4/catalogs/sources.gsfc GSFC 2015a astro solution, unpublished 90 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. 'Core' scans are those for which PREEMPT is not 'EXTRA'. The 'DOSCANS' columns are for scans in the range selected by DOSCANS Those are the scans sent to the Vex and other files Source Setup file Frequency sets Core scans (Hours) DOSCANS (duplicates not shown) Scan Baseline Scan Baseline 3C318 sess117.L2048glob 12 18 0.350 0.917 0.433 0.917 ARP220 sess117.L2048glob 1 2 3 4 5 6 7 8 11 12 18 23 8.331 866.845 9.606 914.411 3C286 sess117.L2048glob 18 0.083 0.000 0.083 0.000 J1516+1932 sess117.L2048glob 1 2 3 4 5 6 7 8 11 12 18 23 0.367 34.836 0.433 36.969 J1532+2344 sess117.L2048glob 1 2 3 4 5 6 7 8 11 12 18 23 2.467 256.869 2.917 272.768 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) 3C318 111.1 ARP220 107.8 3C286 134.1 J1516+1932 111.9 J1532+2344 108.3 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