COVER INFORMATION Station: GBT_VLBA (Code Gb ) Experiment: RadioAstron AGN polarization imaging Exp. Code: gr039 Schedule Version: 1.00 Processed by SCHED version: 11.40 Release 11.4. March 14, 2015 PI: E.Ros Address: Max Planck Institute for Radio Astronomy Auf dem Hugel 69 D-53121 Bonn Phone: +79165452842 EMAIL: eros@mpifr-bonn.mpg.de Fax: Phone during observation: +79165452842 Observing mode: L-K-Q-band, dual-pol Notes: L-band, Radioastron-compatible frequency setup P-CAL is ON Tsys is ON auto-level (AGC) is ON Schedule for GBT_VLBA (Code Gb ) Page 2 RadioAstron AGN polarization imaging 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 ---------------------------------------------------------------------------------------- --- Mon 20 Mar 2017 Day 79 --- ---------- This is an 8-min scan for GBT pointing & focus scans ---------- Next scan frequencies: 1668.00 1668.00 1668.00 1668.00 Next BBC frequencies: 732.00 732.00 732.00 732.00 Next scan bandwidths: 16.00 16.00 16.00 16.00 18 30 00 0615+820 01 04 33 39.2 10.2 -5.4 -92.3 0 0 Stopped 18 38 00 --- 01 12 35 39.5 10.2 -5.3 -94.3 480 0 ---------- L-band VLBI scans. Space segment 01: 0615+820 with ---------- 18 40 00 0615+820 01 14 35 39.6 10.2 -5.3 -94.8 100 0 18 40 00 19 00 00 --- 01 34 38 40.2 10.0 -4.9 -99.9 1200 39 18 40 01 19 00 30 0615+820 01 35 08 40.3 10.0 -4.9 -100.0 10 39 19 00 30 19 20 00 --- 01 54 41 40.9 9.8 -4.6 -105.0 1170 76 19 00 31 ---------- Ground segment 02: scans on 0615+820 at L-band ---------- 19 21 00 2007+777 01 55 42 37.9 -15.4 5.8 82.8 -14 76 19 21 14 19 37 30 --- 02 12 14 37.1 -15.2 6.1 78.8 976 108 19 21 01 19 38 00 0615+820 02 12 44 41.5 9.6 -4.3 -109.6 -43 108 19 38 43 19 54 20 --- 02 29 07 42.0 9.3 -4.0 -113.8 937 138 19 38 01 19 54 50 0615+820 02 29 37 42.1 9.3 -4.0 -114.0 10 138 19 54 50 20 11 10 --- 02 46 00 42.6 9.0 -3.7 -118.3 980 169 19 54 51 20 11 40 0615+820 02 46 30 42.6 9.0 -3.7 -118.4 10 169 20 11 40 20 28 00 --- 03 02 53 43.1 8.6 -3.4 -122.7 980 201 20 11 41 20 28 30 0615+820 03 03 23 43.1 8.6 -3.4 -122.8 10 201 20 28 30 20 44 50 --- 03 19 45 43.6 8.1 -3.2 -127.2 980 233 20 28 31 20 45 20 0615+820 03 20 15 43.6 8.1 -3.2 -127.3 10 233 20 45 20 21 01 40 --- 03 36 38 44.0 7.6 -2.9 -131.7 980 264 20 45 21 21 02 10 0615+820 03 37 08 44.0 7.6 -2.9 -131.9 10 264 21 02 10 21 18 30 --- 03 53 31 44.4 7.0 -2.6 -136.3 980 296 21 02 11 21 19 00 0615+820 03 54 01 44.4 7.0 -2.6 -136.5 10 296 21 19 00 21 35 20 --- 04 10 24 44.8 6.4 -2.3 -140.9 980 327 21 19 01 21 35 50 0615+820 04 10 54 44.8 6.4 -2.3 -141.1 10 327 21 35 50 21 52 10 --- 04 27 16 45.2 5.7 -2.0 -145.6 980 359 21 35 51 Schedule for GBT_VLBA (Code Gb ) Page 3 RadioAstron AGN polarization imaging 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 ---------------------------------------------------------------------------------------- --- Mon 20 Mar 2017 Day 79 --- 21 52 40 0615+820 04 27 47 45.2 5.7 -2.0 -145.7 10 359 21 52 40 22 09 00 --- 04 44 09 45.5 5.0 -1.8 -150.3 980 390 21 52 41 ---------- L-band VLBI scans. Space segment 02: 0615+820 with ---------- 22 10 00 0615+820 04 45 09 45.5 5.0 -1.7 -150.5 40 390 22 10 00 22 30 00 --- 05 05 13 45.8 4.1 -1.4 -156.1 1200 429 22 10 01 22 30 30 0615+820 05 05 43 45.8 4.1 -1.4 -156.3 10 429 22 30 30 22 50 00 --- 05 25 16 46.0 3.2 -1.1 -161.8 1170 467 22 30 31 ---------- Ground segment 03: scans on 0615+820 at L-band ---------- 22 51 00 2007+777 05 26 16 28.8 -8.8 9.4 34.8 -24 467 22 51 24 23 10 10 --- 05 45 29 28.3 -7.8 9.7 30.5 1126 503 22 51 01 23 10 40 0615+820 05 45 59 46.2 2.2 -0.7 -167.6 -56 503 23 11 36 23 27 00 --- 06 02 22 46.3 1.4 -0.5 -172.3 924 533 23 10 41 23 27 30 0615+820 06 02 52 46.3 1.3 -0.4 -172.4 10 533 23 27 30 23 43 50 --- 06 19 15 46.4 0.5 -0.2 -177.1 980 564 23 27 31 --- Start: Mon 20 Mar 2017 Day 79 -- Stop: Tue 21 Mar 2017 Day 80 --- 23 44 20 0615+820 06 19 45 46.4 0.5 -0.2 -177.2 10 564 23 44 20 00 00 40 --- 06 36 08 46.4 -0.3 0.1 178.2 980 596 23 44 21 00 01 10 0615+820 06 36 38 46.4 -0.4 0.1 178.0 10 596 00 01 10 00 17 30 --- 06 53 00 46.4 -1.2 0.4 173.4 980 627 00 01 11 00 18 00 0615+820 06 53 30 46.4 -1.2 0.4 173.2 10 627 00 18 00 00 34 20 --- 07 09 53 46.3 -2.0 0.7 168.6 980 659 00 18 01 00 34 50 0615+820 07 10 23 46.3 -2.0 0.7 168.4 10 659 00 34 50 00 51 10 --- 07 26 46 46.1 -2.8 1.0 163.8 980 691 00 34 51 00 51 40 0615+820 07 27 16 46.1 -2.9 1.0 163.7 10 691 00 51 40 01 08 00 --- 07 43 39 45.9 -3.6 1.2 159.1 980 722 00 51 41 01 08 30 0615+820 07 44 09 45.9 -3.7 1.2 158.9 10 722 01 08 30 01 24 50 --- 08 00 31 45.7 -4.4 1.5 154.3 980 754 01 08 31 01 25 20 0615+820 08 01 01 45.7 -4.4 1.5 154.2 10 754 01 25 20 01 41 40 --- 08 17 24 45.4 -5.1 1.8 149.6 980 785 01 25 21 Schedule for GBT_VLBA (Code Gb ) Page 4 RadioAstron AGN polarization imaging 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 21 Mar 2017 Day 80 --- 01 42 10 0615+820 08 17 54 45.4 -5.2 1.8 149.5 10 785 01 42 10 01 58 30 --- 08 34 17 45.1 -5.8 2.1 144.9 980 817 01 42 11 ---------- L-band VLBI scans. Space segment 03: 0615+820 with ---------- 02 00 00 0615+820 08 35 47 45.1 -5.9 2.1 144.5 70 817 02 00 00 02 20 00 --- 08 55 50 44.7 -6.7 2.4 139.0 1200 855 02 00 01 02 20 30 0615+820 08 56 21 44.6 -6.7 2.4 138.9 10 855 02 20 30 02 40 00 --- 09 15 54 44.2 -7.4 2.8 133.6 1170 893 02 20 31 ---------- Ground segment 04: scans on 0615+820 at L-band ---------- 02 41 00 0615+820 09 16 54 44.1 -7.4 2.8 133.3 40 893 02 41 00 02 51 00 --- 09 26 56 43.9 -7.7 3.0 130.6 600 912 02 41 01 02 51 30 0615+820 09 27 26 43.9 -7.7 3.0 130.4 10 912 02 51 30 03 07 50 --- 09 43 48 43.4 -8.2 3.2 126.1 980 944 02 51 31 03 08 20 0615+820 09 44 18 43.4 -8.2 3.2 125.9 10 944 03 08 20 03 24 40 --- 10 00 41 42.9 -8.7 3.5 121.6 980 976 03 08 21 03 25 10 0615+820 10 01 11 42.9 -8.7 3.5 121.4 10 976 03 25 10 03 41 30 --- 10 17 34 42.4 -9.1 3.8 117.1 980 1007 03 25 11 03 42 00 0615+820 10 18 04 42.4 -9.1 3.8 117.0 10 1007 03 42 00 03 58 20 --- 10 34 27 41.9 -9.4 4.1 112.7 980 1039 03 42 01 03 58 50 0615+820 10 34 57 41.9 -9.4 4.1 112.6 10 1039 03 58 50 04 15 10 --- 10 51 19 41.4 -9.7 4.4 108.4 980 1070 03 58 51 SETUP FILE INFORMATION: NOTE: If DOPPLER, FREQ, or BW were used, see the individual scans for the final BBC settings. ======== Setup file: ra18cm2.set Matching groups in ./gr039_freq.dat: g20cm_2 LO1=4.632, LO2=12.732, LO3=10.5 Setup group: 1 Station: GBT_VLBA Total bit rate: 256 Format: VDIF Bits per sample: 2 Sample rate: 32.000 Number of channels: 4 DBE type: RDBE_DDC Speedup factor: 1.00 Disk used to record data. 1st LO= 2400.00 2400.00 2400.00 2400.00 Net SB= L L U U IF SB = L L L L Pol. = RCP LCP RCP LCP BBC = 1 2 3 4 BBC SB= U U L L IF = A C A C The following frequency sets based on these setups were used. Frequency Set: 1 Setup file default. Used with PCAL = 1MHz LO sum= 1668.00 1668.00 1668.00 1668.00 BBC fr= 732.00 732.00 732.00 732.00 Bandwd= 16.00 16.00 16.00 16.00 VLBA legacy crd files using 4 channels based on RDBE channels: 1 2 3 4 CRD fr= 731.99 731.99 732.01 732.01 CRD bw= 16.00 16.00 16.00 16.00 Matching frequency sets: 1 Track assignments are: track1= 1, 2, 3, 4 barrel=roll_off POSITIONS OF SOURCES USED IN RECORDING SCANS Source Source position (RA/Dec) Error (B1950) (J2000) (Date) (mas) * FAKERA 11 57 21.769299 * 12 00 00.000000 12 01 00.367264 0.00 85 16 41.77889 * 85 00 00.00000 84 54 17.22708 0.00 From catalog imbedded in main SCHED input file. fake circumpolar target for a TS to look at * 0615+820 06 15 32.765101 * 06 26 03.006221 06 29 37.890984 0.00 J0626+8202 82 03 56.43135 * 82 02 25.56790 82 01 53.90638 0.00 ./gr039_sources.radioastron AGN, rfc_2013d Petrov, 201d, RA-AO4-09 * 2007+777 20 07 20.430168 * 20 05 30.998496 20 04 50.658051 0.00 J2005+7752 77 43 58.12300 * 77 52 43.24753 77 55 30.00114 0.00 ./gr039_sources.radioastron AGN, rfc_2013d Petrov, 2013, unpublished 16338 observations, RA-AO3-04, RA-AO2-1 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 FAKERA ra18cm2.set 23 4.600 0.000 0615+820 ra18cm2.set 1 2 3 4 5 6 7 8 9 10 13 17.992 1564.327 ra1cm2.set 24 25 26 27 30 35 36 28.325 631.950 ra7mm2.set 31 34 46 56 7.350 595.039 2007+777 ra18cm2.set 1 2 3 4 6 7 8 9 10 0.867 34.039 ra1cm2.set 24 25 26 27 30 35 36 1.831 77.044 ra7mm2.set 31 34 46 56 0.856 82.328 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) FAKERA 94.8 0615+820 90.6 2007+777 83.6 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