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COVER INFORMATION

Station: TID70_S2 (Code Ti )
Experiment: VSOP observation of J1850+28 at 1.6 GHz
Exp. Code: w171d


Schedule Version: 1.00
Processed by SCHED version: Short term release of 12 Feb. 2001

PI: Seiji Kameno

Address: National Astronomical Observatory
2-21-1 Osawa, Mitaka, Tokyo
181-8588 Japan


Phone: +81-422-34-3807
EMAIL: kameno@hotaka.mtk.nao.ac.jp
Fax: +81-422-34-3869
Phone during observation:

Observing mode: VSOP, 1.6 GHz continuum, 128-2-2

Notes: Fringe finder : J1733-13 and J1924-29




Schedule for TID70_S2 (Code Ti ) Page 2
VSOP observation of J1850+28 at 1.6 GHz
UP: D => Below limits; H => Below horizon mask. blank => Up.
Early: Seconds between end of slew and start. Dwell: On source seconds.
Tapes: Drive, Index, Start footage / Direction, Head Group, End footage.
TPStart: Tape motion start time. Frequencies are LO sum (band edge).
----------------------------------------------------------------------------------------
Start UT Source Start / Stop Early Tapes TPStart
Stop UT LST EL AZ HA UP ParA Dwell (see above)
----------------------------------------------------------------------------------------

--- Thu 19 Apr 2001 Day 109 ---

Next scan frequencies: 1634.00 1650.00
Next BBC frequencies: 254.00 270.00
Next scan bandwidths: 16.00 16.00

15 35 00 J1850+28 15 22 09 9.5 404.7 -3.5 -139.3 0 1 1 52 15 35 00
16 00 00 --- 15 47 13 12.9 400.3 -3.1 -143.1 1500 F 1 578

16 15 00 J1850+28 16 02 15 14.9 397.6 -2.8 -145.6 884 1 1 632 16 15 00
16 45 00 --- 16 32 20 18.3 391.7 -2.3 -150.9 1800 F 1 1262

17 10 00 J1733-13 16 57 24 66.3 382.1 -0.6 -161.7 1258 1 1 1317 17 10 00
17 20 00 --- 17 07 26 66.9 376.1 -0.4 -166.5 600 F 1 1527

17 30 00 J1850+28 17 17 28 22.5 382.1 -1.6 -159.6 376 1 1 1581 17 30 00
17 45 00 --- 17 32 30 23.6 378.7 -1.3 -162.7 900 F 1 1896

18 00 00 J1850+28 17 47 32 24.5 375.2 -1.0 -165.9 881 1 1 1951 18 00 00
18 15 00 --- 18 02 35 25.2 371.6 -0.8 -169.2 900 F 1 2266

18 45 00 J1850+28 18 32 40 26.0 364.4 -0.3 -176.0 1762 1 1 2321 18 45 00
19 00 00 --- 18 47 42 26.2 360.7 0.0 -179.4 900 F 1 2636

19 10 00 J1924-29 18 57 44 81.6 404.8 -0.5 -138.8 321 1 1 2690 19 10 00
19 20 00 --- 19 07 46 82.9 391.6 -0.3 -150.7 600 F 1 2900

19 30 00 J1850+28 19 17 47 25.9 353.3 0.5 173.8 313 1 1 2955 19 30 00
20 00 00 --- 19 47 52 24.8 346.1 1.0 167.2 1800 F 1 3585

20 00 00 J1850+28 19 47 52 24.8 346.1 1.0 167.2 -2 1 1 3585 20 00 00
21 00 00 --- 20 48 02 20.4 332.6 2.0 154.7 3598 F 1 4845

21 00 00 J1850+28 20 48 02 20.4 332.6 2.0 154.7 -2 1 1 4845 21 00 00
22 10 00 --- 21 58 14 12.3 318.9 3.1 142.4 4198 F 1 6315


SETUP FILE INFORMATION:
NOTE: If DOPPLER, FREQ, or BW were used, see the individual scans for the final BBC settings.


Setup file: /home/sched/short-term/progs/current/setups/vsop1634_s2.set
Matches group ti18cm in /home/sched/short-term/progs/current/catalogs/freq.dat
LO from Harbison, e-mail 20/03/97. other values guesses

Setup group: 4 Station: TID70_S2 Total bit rate: 128
Format: S2 Bits per sample: 2 Sample rate: 32.000
Number of channels: 2 Passes/head pos: 1 Speedup factor: 1.00

Tape speeds: Low density - 6.300 ips, High density - 4.20 ips
Time per pass for 7600 ft, High density tapes is: 06:01:54

1st LO= 1380.00 1380.00
Net SB= U U
Pol. = LCP LCP
BBC = 1 3
BBC SB= U U
IF = 1N 1N

The following frequency sets based on this setup were used.

Frequency Set: 3 Setup file default. No pcal detection.
LO sum= 1634.00 1650.00
BBC fr= 254.00 270.00
Bandwd= 16.000 16.000

Track assignments are:
track1= 0, 0
barrel=roll_off
 SOURCE LIST -- VSOP observation of J1850+28 at 1.6 GHz
Catalog positions marked with *.
Precession of date coordinates is based on stop time of first scan.
Names used in schedule marked with *.
Short names used in VLA and SNAP files marked with +.
Observation date used in B1950/J2000 coordinate conversion (PRECDATE): 1979.900
No adjustments are made for rates (DRA, DDEC).

Source Source position (RA/Dec)
(B1950) (J2000) (Date)

J1733-1304 17 30 13.535185 * 17 33 02.705782 17 33 06.695616
1730-130 -13 02 45.83980 *-13 04 49.54828 -13 04 54.12969
* J1733-13 /home/sched/short-term/progs/current/catalogs/sources.vlba
NRAO530 USNO - Ref Frame 1998-6, Eubanks June 1998

J1850+2825 18 48 29.073525 * 18 50 27.593600 18 50 30.288966
1848+283 28 21 38.44750 * 28 25 13.11800 28 25 03.45792
* J1850+28 /home/sched/short-term/progs/current/catalogs/sources.vlba
JVAS - Wilkinson et al. 1998, mnras, 300, 790; S8.4GHz= 1467 mJy

J1924-2914 19 21 42.234131 * 19 24 51.055958 19 24 54.841037
1921-293 -29 20 26.35409 *-29 14 30.12119 -29 14 19.20853
* J1924-29 /home/sched/short-term/progs/current/catalogs/sources.vlba
USNO - Ref Frame 1998-6, Eubanks June 1998



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)
J1733-13 125.8
J1850+28 97.5
J1924-29 101.1

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