COVER INFORMATION Station: GBTS (Code Gt ) Experiment: RadioAstron Imaging of high-redshift quasars Exp. Code: eg089d Schedule Version: 1.00 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 4 Mar 2016 Day 64 --- ---------- 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 10 00 00 FAKERA 15 31 03 41.4 -5.4 3.5 124.0 0 0 10 00 00 10 16 45 --- 15 47 51 41.1 -5.7 3.8 119.7 1005 32 10 00 01 10 17 15 FAKERA 15 48 21 41.1 -5.7 3.8 119.5 10 32 10 17 15 10 34 30 --- 16 05 38 40.7 -5.9 4.1 115.1 1035 65 10 17 16 10 35 00 FAKERA 16 06 09 40.7 -5.9 4.1 114.9 10 65 10 35 00 10 52 15 --- 16 23 26 40.4 -6.1 4.4 110.5 1035 99 10 35 01 10 52 45 FAKERA 16 23 56 40.4 -6.1 4.4 110.4 10 99 10 52 45 11 10 00 --- 16 41 14 40.0 -6.3 4.7 106.0 1035 132 10 52 46 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: 15 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 15 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 56.252985 0.00 85 16 41.77889 * 85 00 00.00000 84 54 29.90431 0.00 From catalog imbedded in main SCHED input file. fake circumpolar target for a TS to look at * 1508+572 15 08 45.204538 * 15 10 02.922371 15 10 28.389286 0.00 J1510+5702 57 14 02.08966 * 57 02 43.37583 56 58 52.71241 0.00 ./eg089d_sources.radioastron AGN, HIGHz, rfc_2013d Petrov, 2013, unpublished 2400 observations, RA-AO3-04, RA * 1849+670 18 49 16.505869 * 18 49 16.072282 18 49 14.459139 0.00 J1849+6705 67 02 07.88049 * 67 05 41.68023 67 06 41.01151 0.00 ./eg089d_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 22.284079 0.00 J2022+6136 61 27 18.15575 * 61 36 58.80476 61 40 00.37365 0.00 ./eg089d_sources.radioastron AGN, CSO, rfc_2013d Petrov, 2013, unpublished 3249 observations, RA-AO3-04, RA-A 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 2.933 0.000 1508+572 ra18cm2.set 1 2 3 4 5 6 7 10 12 13 14 8.153 584.572 1849+670 ra18cm2.set 1 2 3 4 5 6 7 10 12 13 14 0.667 49.658 2021+614 ra18cm2.set 1 2 3 4 5 6 7 10 12 13 14 0.333 24.000 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 101.0 1508+572 110.1 1849+670 85.7 2021+614 74.5 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