|
This file was used to observe 3C273 in continuum mode at
Q-band. Several flux calibrators as well as tipping scans are
included.
Observing strategy:
- Start with an X-band pointing scan on the target source 3C273
- Observe the target 3C273 at the intended frequency (Q-band)
- Go to the secondary flux calibrator 3C286 and do an X-band
pointing (it is not close enough to 3C273 and needs a new pointing
correction)
- Observe the secondary flux calibrator 3C286 at Q-band
- Go to the primary flux calibrator 0410+769 and do an X-band pointing
scan
- Observe 0410+769 at Q-band.
- Finish the observations with tipping scans; here are two
tipping scans included.
This is the resulting observe file. Parts of the file are
marked in color, with explanations below. These are things you need
to look for in your observe file, to make sure the schedule is
correct.
/.DSTST 2160
//* ***
//* *** NRAO VLA Observe Program, Version U4.0.5, 1999.01.06
//* ***
//* *** Observation day 58,261 at 11 18 00 LST, 2000.01.05 04:30:56 MST.
//* ***
//* *** Observer
//* *** Debra Shepherd Phone
//* *** NRAO, Socorro Office: (505)835-7398
//* *** During observation: (505)835-7398
//* ***
//* ***
//* ***
//* *** E-Mail address
//* *** dshepher@aoc.nrao.edu
//* ***
//* *** Observing mode(s): Continuum
//* ***
//* *** Special Instructions
//* *** Q Band observations of 3c273 using all available receivers
//* *** (set to run after K Band obs file)
//* ***
//* ***
//* ***
//* *** Date Prepared: 2000.01.04 09:37:06 MST.
//* ***
1229+020 11 22 17 12 29 06.6997 +02 03 08.598C XX IRA 0000 27.50
//DS 10
//LO 13.4 13.4 3940 3890
//FISF 100.000000 200.000000
1229+020 11 23 42 12 29 06.6997 +02 03 08.598C QQ A 0000T 27.70
//DS 10
//LO 51.6 13.0 3690 3740 0000
//FISF 100.000000 200.000000
1331+305 11 28 06 13 31 08.2882 +30 30 32.960C XX IRA 0000 5.23
//DS 10
//LO 13.4 13.4 3940 3890
//FISF 100.000000 200.000000
1331+305 11 29 33 13 31 08.2882 +30 30 32.960C QQ A 0000T 1.49
//DS 10
//LO 51.6 13.0 3690 3740 0000
//FISF 100.000000 200.000000
0410+769 11 34 59 04 10 45.6057 +76 56 45.301C XX IRC 0000 2.21
//DS 10
//LO 13.4 13.4 3940 3890
//FISF 100.000000 200.000000
0410+769 11 37 25 04 10 45.6057 +76 56 45.301C QQ C 0000T 0.70
//DS 10
//LO 51.6 13.0 3690 3740 0000
//FISF 100.000000 200.000000
QTIPDWN 11 48 25 21 20 00.0000 +60 00 00.000C QQ TE 0000
//DS 10
//LO 51.6 13.0 3690 3740 0000
//FISF 100.000000 200.000000
QTIPUP 12 00 00 21 20 00.0000 +20 00 00.000C QQ TE 0000
//DS 10
//LO 51.6 13.0 3690 3740 0000
//FISF 100.000000 200.000000
| 12 29 06.6997 +02 03 08.598 |
The observing position given in RA and DEC. |
| XX |
XX defines the observing frequency. Since this is a pointing scan, it should be in X-band. |
| IR |
This defince a referenced pointing scan (set by specifying "Det. ref. point." in the OBSERVE Source Page). |
| 10 |
The integration time in seconds. Make sure this is 10 for your pointing scan. |
| QQ |
Check that in this scan you observe at your desired band, here Q. |
| T |
This T shows that you are applying the pointing corrections
to the observing scan (set by specifying "Referenced Pointing" in
the OBSERVE Source Page). |
| TE |
This defines a tipping scan (set by specifying "Tipping scan" in the OBSERVE Source Page). |
| 21 20 00.0000 |
For a tipping scan this is the
azimuth (in degrees) at which the tip should be performed. The
important thing here is to avoid shadowing in the compact C and D
configurations. |
+60 00
00.000
+20 00
00.000 |
The Dec determines whether the tip is
done from low to high elevation, or from high to low
elevation. Close to 23 degrees means from low to high elevations,
while nearer to 55 degrees means the pass goes from high to low
elevations. |
|
National Radio
