Документ взят из кэша поисковой машины. Адрес оригинального документа : http://www.atnf.csiro.au/pub/people/vlbi/delete_me/v147asch.ho Дата изменения: Thu Nov 8 11:17:38 2001 Дата индексирования: Mon Dec 24 16:52:49 2007 Кодировка: Поисковые слова: solar corona

COVER INFORMATION

Station: HOBART (Code Ho )
Experiment: LBA Imaging of X-ray jet in PKS 0637-752
Exp. Code: v147a


Schedule Version: 1.00
Processed by SCHED version: Release of 28 April 2000

PI: Roopesh Ojha

Address: ATNF
PO Box 76
Epping NSW 2112, Australia


Phone: +61-02-9372-4174
EMAIL: rojha@atnf.csiro.au
Fax: +61-02-9372-4310
Phone during observation:

Observing mode: LBA, 1.6 GHz continuum

Notes: Fringe finder : 1934-638




Schedule for HOBART (Code Ho ) Page 2
LBA Imaging of X-ray jet in PKS 0637-752
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.
----------------------------------------------------------------------------------------
Start UT Source Start / Stop Early Tapes TPStart
Stop UT LST EL AZ HA UP ParA Dwell (see above)
----------------------------------------------------------------------------------------

--- Sun 11 Nov 2001 Day 315 ---

Next scan frequencies: 1634.00 1650.00
Next BBC frequencies: 164.60 148.60
Next scan bandwidths: 16.00 16.00

09 30 00 1934-638 22 42 09 56.8 215.3 3.0 73.2 0 1 1 52 09 30 00
09 40 00 --- 22 52 11 55.7 215.8 3.2 75.8 600 F 1 263

09 40 00 0637-752 22 52 11 35.1 163.8 -7.7 -126.2 -51 1 1 263 09 40 00
11 40 00 --- 00 52 31 42.1 160.0 -5.7 -99.4 7149 F 1 2783

11 40 00 1934-638 00 52 31 42.5 216.0 5.2 103.1 -63 1 1 2783 11 40 00
11 50 00 --- 01 02 32 41.4 215.6 5.4 105.1 537 F 1 2993

11 50 00 0637-752 01 02 32 42.8 159.9 -5.6 -97.1 -63 1 1 2993 11 50 00
14 50 00 --- 04 03 02 53.5 164.7 -2.5 -49.7 10737 F 1 6773

14 50 00 0637-752 04 03 02 53.5 164.7 -2.5 -49.7 -2 1 1 6773 14 50 00
15 26 00 --- 04 39 08 55.1 167.5 -1.9 -38.7 2158 F 1 7529

----------- Tape Change ------------

15 30 00 0607-157 04 43 08 57.2 41.0 -1.4 -150.0 148 1 1 52 15 30 00
15 50 00 --- 05 03 12 59.4 32.8 -1.1 -155.6 1200 F 1 472

15 50 00 0637-752 05 03 12 56.0 169.7 -1.5 -31.0 -92 1 1 472 15 50 00
21 26 00 --- 10 40 07 48.4 199.6 4.1 75.1 20068 F 1 7528

--- Start: Sun 11 Nov 2001 Day 315 -- Stop: Mon 12 Nov 2001 Day 316 ---

----------- Tape Change ------------

21 30 00 0637-752 10 44 08 48.1 199.7 4.1 76.2 238 1 1 52 21 30 00
01 00 00 --- 14 14 42 35.4 196.5 7.6 125.2 12600 F 1 4463

01 00 00 1934-638 14 14 42 41.2 144.4 -5.4 -105.4 -61 1 1 4463 01 00 00
01 10 00 --- 14 24 44 42.3 144.1 -5.2 -103.4 539 F 1 4673

01 10 00 0637-752 14 24 44 34.9 196.0 7.8 127.3 -60 1 1 4673 01 10 00
03 26 00 --- 16 41 06 29.6 188.1 10.1 156.1 8100 F 1 7529


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


Setup file: lba1634_s2.set
Matches group ho18cm in /nfs/atapplic/vlbi/sched/catalogs/freq.dat
LO from M Costa, e-mail 24/03/97 other values guesses

Setup group: 4 Station: HOBART 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= 1798.60 1798.60
Net SB= U U
Pol. = LCP LCP
BBC = 1 3
BBC SB= L L
IF = 1N 1N

The following frequency sets based on this setup were used.

Frequency Set: 4 Setup file default. No pcal detection.
LO sum= 1634.00 1650.00
BBC fr= 164.60 148.60
Bandwd= 16.000 16.000

Track assignments are:
track1= 0, 0
barrel=roll_off
 SOURCE LIST -- LBA Imaging of X-ray jet in PKS 0637-752
Catalog positions marked with *.
Position of date is for stop time of first scan.
Names used in schedule marked with *.
Short names used in VLA and SNAP files marked with +.

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

J0609-1542 06 07 25.981281 * 06 09 40.949535 06 09 46.034834
* 0607-157 -15 42 03.30587 *-15 42 40.67266 -15 42 33.06924
J0609-15 /nfs/atapplic/vlbi/sched/catalogs/sources.vlba
USNO - Ref Frame 1998-6, Eubanks June 1998

J0635-7516 06 37 23.353517 * 06 35 46.507923 06 35 47.182769
* 0637-752 -75 13 37.54896 *-75 16 16.81537 -75 16 05.77082
J0635-75 /nfs/atapplic/vlbi/sched/catalogs/sources.vlba
USNO - Ref Frame 1998-6, Eubanks June 1998

J1939-6342 19 34 47.606927 * 19 39 25.026512 19 39 31.913087
* 1934-638 -63 49 37.72356 *-63 42 45.62517 -63 42 46.85238
J1939-63 /nfs/atapplic/vlbi/sched/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)
0607-157 124.2
0637-752 81.8
1934-638 64.5

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