COVER INFORMATION Station: GBTS (Code Gt ) Experiment: RadioAstron Imaging of high-redshift quasars Exp. Code: eg089a Schedule Version: 1.20 Processed by SCHED version: 11.40 Release 11.4. March 14, 2015 PI: Leonid Gurvits Address: Joint Institute for VLBI in Europe Oude Hoogeveensedijk 4 7991 PD Dwingeloo, The Netherlands Phone: +31 521 596 514 EMAIL: lgurvits@jive.eu Fax: +31 521 596 539 Phone during observation: +31 521 596 514 Observing mode: L-band, dual-pol Notes: L-band, Radioastron-compatible frequency setup P-CAL is ON Tsys is ON auto-level (AGC) is ON Schedule for GBTS (Code Gt ) Page 2 RadioAstron Imaging of high-redshift quasars 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 ---------------------------------------------------------------------------------------- --- Fri 16 Oct 2015 Day 289 --- ---------- The following is to control the GBTS tracking station recorder ---------- Next scan frequencies: 1668.00 1668.00 1668.00 1668.00 Next BBC frequencies: 178.00 178.00 178.00 178.00 Next scan bandwidths: 16.00 16.00 16.00 16.00 17 10 00 FAKERA 13 30 16 43.1 -2.7 1.5 155.8 0 0 17 10 00 17 27 40 --- 13 47 59 42.9 -3.1 1.8 151.1 1060 34 17 10 01 17 28 40 FAKERA 13 48 59 42.9 -3.2 1.8 150.8 40 34 17 28 40 17 46 20 --- 14 06 42 42.7 -3.6 2.1 146.1 1060 68 17 28 41 17 47 20 FAKERA 14 07 42 42.7 -3.6 2.1 145.8 40 68 17 47 20 18 00 00 --- 14 20 24 42.5 -4.0 2.3 142.4 760 92 17 47 21 SETUP FILE INFORMATION: NOTE: If DOPPLER, FREQ, or BW were used, see the individual scans for the final BBC settings. ======== Setup file: ra18cm2.set --- 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: 13 Station: GBTS Total bit rate: 256 Format: MARK5B Bits per sample: 2 Sample rate: 32.000 Number of channels: 4 DBE type: Speedup factor: 1.00 Disk used to record data. 1st LO= 1490.00 1490.00 1490.00 1490.00 Net SB= U L U L IF SB = U U U U Pol. = LCP LCP RCP RCP BBC = 1 1 2 2 BBC SB= U L U L IF = A A B B The following frequency sets based on these setups were used. Frequency Set: 11 Setup file default. Used with PCAL = off LO sum= 1668.00 1668.00 1668.00 1668.00 BBC fr= 178.00 178.00 178.00 178.00 Bandwd= 16.00 16.00 16.00 16.00 Matching frequency sets: 11 13 Track assignments are: track1= 2, 4, 6, 8 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 00 28.343040 0.00 85 16 41.77889 * 85 00 00.00000 84 54 36.68124 0.00 From catalog imbedded in main SCHED input file. fake circumpolar target for a TS to look at * 0014+813 00 14 04.461856 * 00 17 08.474899 00 18 20.230014 0.00 J0017+8135 81 18 28.65820 * 81 35 08.13656 81 40 30.19439 0.00 ./eg089a_sources.radioastron HIGHz, rfc_2013d Petrov, 2013, unpublished 73794 observations, RA-AO3-03, RA-AO2 * 1849+670 18 49 16.505869 * 18 49 16.072282 18 49 15.374758 0.00 J1849+6705 67 02 07.88049 * 67 05 41.68023 67 07 17.87875 0.00 ./eg089a_sources.radioastron AGN, rfc_2013d Petrov, 2013, unpublished 7270 observations, RA-AO3-04, RA-AO2-12 * 2021+614 20 21 13.300234 * 20 22 06.681752 20 22 24.522826 0.00 J2022+6136 61 27 18.15575 * 61 36 58.80476 61 40 29.91825 0.00 ./eg089a_sources.radioastron AGN, CSO, rfc_2013d Petrov, 2013, unpublished 3249 observations, RA-AO3-04, RA-A * 2200+420 22 00 39.362504 * 22 02 43.291371 22 03 23.862147 0.00 J2202+4216 42 02 08.59073 * 42 16 39.97987 42 21 36.00268 0.00 BLLAC ./eg089a_sources.radioastron AGN, rfc_2013d Petrov, 2013, unpublished 59417 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 11 2.567 0.000 0014+813 ra18cm2.set 1 2 3 4 5 6 7 8 12 5.958 274.700 1849+670 ra18cm2.set 1 2 3 4 5 6 7 8 12 0.667 30.166 2021+614 ra18cm2.set 1 2 3 4 5 6 7 8 12 0.667 29.984 2200+420 ra18cm2.set 1 2 3 4 5 6 7 8 12 0.500 22.492 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 94.1 0014+813 106.9 1849+670 94.8 2021+614 104.7 2200+420 124.8 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