|
Those observations searched for 43 GHz SiO masers in AGB stars
in the Galactic centre. Fast switching is applied. All sources are
close to 1733-130 (used for bandpass calibration and pointing
scans) and 1745-290 (the phase calibrator thus used for all
sources).
Observing strategy:
- Go to the flux calibrator 3C286 and do an X-band pointing scan
- Observe 3C286 at Q-band in the desired spectral line mode
- Go to the bandpass calibrator 1733-130 and do a pointing scan
- Observe the bandpass calibrator 1733-130 at 4 different
frequencies, corresponding to 4 different groups of velocities (or
equivalently, 4 different LO frequencies). When applying those
corrections in the data reduction, use the one closest in
frequency.
- Observe the set of 39 sources according to:
- Observe the phase calibrator 1745-290 at frequency corresponding to the target source no i.
- Do a fast switching scan of around 5 minutes switching
between the target source and the phase calibrator
1745-290. Cycle time 100 sec (70 sec on target/30 sec on
calibrator). Note that the target source is defined first in
the fast switching card, to make sure Doppler corrections are
made for the target.
- Repeat those steps for the next target source. However, if the
frequency of the next target is close to the preceding, step no 1
is skipped.
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.
/.AS717 1905
//* ***
//* *** NRAO VLA Observe Program, Version U4.0.6, 2000.07.11
//* ***
//* *** Observation day 58,997 at 14 00 00 LST, 2002.01.08 06:58:40 MST.
//* ***
//* *** Observer
//* *** LO Sjouwerman Phone
//* *** NRAO Socorro Office: 835-7332
//* *** During observation: Offc or 8382996
//* ***
//* ***
//* ***
//* *** E-Mail address
//* *** lsjouwer@nrao.edu
//* ***
//* *** Observing mode(s): line
//* ***
//* *** Special Instructions
//* *** 4IF line mode in Fast-switching Qband and Reference pointing in Xband
//* *** Extend on pointing if necessary; need all correlator capacity (ie set
//* *** non-Q offline=subarray -1). If possible due to Qant moves try 3.3 or 5
//* *** sec (now set to 6.6 but prefer shorter) - NOT 10 secs if avoidable!
//* ***
//* *** Date Prepared: 2002.01.07 12:21:07 MST.
//* ***
//*
1331+305 14 05 24 13 31 08.2880 +30 30 32.959C XX IRA 0000 5.23
//DS 10
//LO 13.4 13.4 3940 3890
//FISF 100.000000 200.000000
1331+305 14 07 49 13 31 08.2880 +30 30 32.959C QQ A 3333T 1.49
//DS 4 6 0 000 0 000 0 000 0 000
//LO 51.6 13.4 3610 3910 0000
//FISVTL 0.000 0.000 42820.587000 43122.080000
1733-130 14 13 43 17 33 02.7058 -13 04 49.548C XX IRB 0000 10.50
//DS 10
//LO 13.4 13.4 3940 3890
//FISF 100.000000 200.000000
1733-130 2 14 17 10 17 33 02.7058 -13 04 49.548C QQ B 3333T 9.00
//DS 4 6 0 000 0 000 0 000 0 000
//LO 51.6 13.4 3590 3890 0000
//FISVTL 100.000 100.000 42820.587000 43122.080000
1733-130 1 14 19 44 17 33 02.7058 -13 04 49.548C QQ B 3333T 9.00
//DS 4 6 0 000 0 000 0 000 0 000
//LO 51.6 13.4 3560 3860 0000
//FISVTL 300.250 300.250 42820.587000 43122.080000
1733-130 4 14 22 15 17 33 02.7058 -13 04 49.548C QQ B 3333T 9.00
//DS 4 6 0 000 0 000 0 000 0 000
//LO 51.6 13.4 3640 3940 0000
//FISVTL -198.360 -198.360 42820.587000 43122.080000
1733-130 3 14 24 45 17 33 02.7058 -13 04 49.548C QQ B 3333T 9.00
//DS 4 6 0 000 0 000 0 000 0 000
//LO 51.6 13.4 3610 3910 0000
//FISVTL 00000.000 00000.000 42820.587000 43122.080000
1745-290 1 14 26 18 17 45 40.0383 -29 00 28.069C QQ C 3333T 1.10
//DS 4 6 0 000 0 000 0 000 0 000
//LO 51.6 13.4 3560 3860 0000
//FISVTL 300.250 300.250 42820.587000 43122.080000
103.300 1 14 31 45 17 48 37.8710 -26 59 52.080C QQ 3333T
//DS 4 6 0 000 0 000 0 000 0 000
//LO 51.6 13.4 3560 3860 0000
//FISVTL 300.250 300.250 42820.587000 43122.080000
//OF NOD SKY 17 45 40.0383 -29 00 28.069 C 70 30
1745-290 4 14 32 40 17 45 40.0383 -29 00 28.069C QQ C 3333T 1.10
//DS 07">4 6 0 000 0 000 0 000 0 000
//LO 51.6 13.4 3640 3940 0000
//FISVTL -198.360 -198.360 42820.587000 43122.080000
56.-198 4 14 38 01 17 45 04.7820 -29 05 48.450C QQ 3333T
//DS 4 6 0 000 0 000 0 000 0 000
//LO 51.6 13.4 3640 3940 0000
//FISVTL -198.360 -198.360 42820.587000 43122.080000
//OF NOD SKY 17 45 40.0383 -29 00 28.069 C 70 30
1745-290 2 14 38 51 17 45 40.0383 -29 00 28.069C QQ C 3333T 1.10
//DS 4 6 0 000 0 000 0 000 0 000
//LO 51.6 13.4 3590 3890 0000
//FISVTL 120.000 120.000 42820.587000 43122.080000
111.105 2 14 44 16 17 49 25.8480 -28 00 45.140C QQ 3333T
//DS 4 6 0 000 0 000 0 000 0 000
//LO 51.6 13.4 3590 3890 0000
//FISVTL 105.800 105.800 42820.587000 43122.080000
//OF NOD SKY 17 45 40.0383 -29 00 28.069 C 70 30
100.111 2 14 49 39 17 48 18.0880 -28 07 38.820C QQ 3333T
//DS 4 6 0 000 0 000 0 000 0 000
//LO 51.6 13.4 3590 3890 0000
//FISVTL 111.240 111.240 42820.587000 43122.080000
//OF NOD SKY 17 45 40.0383 -29 00 28.069 C 70 30
97.88 2 14 55 04 17 48 08.7770 -28 18 35.750C QQ 3333T
//DS 4 6 0 000 0 000 0 000 0 000
//LO 51.6 13.4 3590 3890 0000
//FISVTL 88.420 88.420 42820.587000 43122.080000
//OF NOD SKY 17 45 40.0383 -29 00 28.069 C 70 30
95.117 2 15 00 29 17 47 36.3530 -28 23 28.390C QQ 3333T
//DS 4 6 0 000 0 000 0 000 0 000
//LO 51.6 13.4 3590 3890 0000
//FISVTL 117.750 117.750 42820.587000 43122.080000
//OF NOD SKY 17 45 40.0383 -29 00 28.069 C 70 30
90.119 2 15 05 55 17 47 01.1820 -28 04 58.800C QQ 3333T
//DS 4 6 0 000 0 000 0 000 0 000
//LO 51.6 13.4 3590 3890 0000
//FISVTL 119.930 119.930 42820.587000 43122.080000
//OF NOD SKY 17 45 40.0383 -29 00 28.069 C 70 30
85.113 2 15 11 20 17 46 42.7170 -28 35 43.550C QQ 3333T
//DS 4 6 0 000 0 000 0 000 0 000
//LO 51.6 13.4 3590 3890 0000
//FISVTL 113.410 113.410 42820.587000 43122.080000
//OF NOD SKY 17 45 40.0383 -29 00 28.069 C 70 30
70.82 2 15 16 44 17 45 42.3210 -28 42 45.180C QQ 3333T
//DS 4 6 0 000 0 000 0 000 0 000
//LO 51.6 13.4 3590 3890 0000
//FISVTL 82.990 82.990 42820.587000 43122.080000
//OF NOD SKY 17 45 40.0383 -29 00 28.069 C 70 30
55.149 2 15 22 09 17 45 01.3330 -28 34 15.380C QQ 3333T
//DS 4 6 0 000 0 000 0 000 0 000
//LO 51.6 13.4 3590 3890 0000
//FISVTL 149.260 149.260 42820.587000 43122.080000
//OF NOD SKY 17 45 40.0383 -29 00 28.069 C 70 30
30.140 2 15 27 35 17 43 35.1810 -29 24 47.200C QQ 3333T
//DS 4 6 0 000 0 000 0 000 0 000
//LO 51.6 13.4 3590 3890 0000
//FISVTL 140.570 140.570 42820.587000 43122.080000
//OF NOD SKY 17 45 40.0383 -29 00 28.069 C 70 30
26.178 2 15 32 59 17 43 25.3190 -29 45 28.480C QQ 3333T
//DS 4 6 0 000 0 000 0 000 0 000
//LO 51.6 13.4 3590 3890 0000
//FISVTL 178.590 178.590 42820.587000 43122.080000
//OF NOD SKY 17 45 40.0383 -29 00 28.069 C 70 30
11.101 2 15 38 24 17 39 37.2610 -30 08 51.360C QQ 3333T
//DS 4 6 0 000 0 000 0 000 0 000
//LO 51.6 13.4 3590 3890 0000
//FISVTL 101.460 101.460 42820.587000 43122.080000
//OF NOD SKY 17 45 40.0383 -29 00 28.069 C 70 30
1745-290 3 15 39 15 17 45 40.0383 -29 00 28.069C QQ C 3333T 1.10
//DS 4 6 0 000 0 000 0 000 0 000
//LO 51.6 13.4 3610 3910 0000
//FISVTL -27.000 -27.000 42820.587000 43122.080000
18.-124 3 15 44 38 17 42 04.3600 -29 58 46.310C QQ 3333T
//DS 4 6 0 000 0 000 0 000 0 000
//LO 51.6 13.4 3610 3910 0000
//FISVTL -124.490 -124.490 42820.587000 43122.080000
//OF NOD SKY 17 45 40.0383 -29 00 28.069 C 70 30
24.-56 3 15 50 02 17 43 09.7990 -29 24 03.240C QQ 3333T
//DS 4 6 0 000 0 000 0 000 0 000
//LO 51.6 13.4 3610 3910 0000
//FISVTL -56.050 -56.050 42820.587000 43122.080000
//OF NOD SKY 17 45 40.0383 -29 00 28.069 C 70 30
25.-27 3 15 55 27 17 43 23.6470 -28 53 49.280C QQ 3333T
//DS 4 6 0 000 0 000 0 000 0 000
//LO 51.6 13.4 3610 3910 0000
//FISVTL -27.810 -27.810 42820.587000 43122.080000
//OF NOD SKY 17 45 40.0383 -29 00 28.069 C 70 30
27.-94 3 16 00 52 17 43 32.7290 -29 15 39.180C QQ 3333T
//DS 4 6 0 000 0 000 0 000 0 000
//LO 51.6 13.4 3610 3910 0000
//FISVTL -94.070 -94.070 42820.587000 43122.080000
//OF NOD SKY 17 45 40.0383 -29 00 28.069 C 70 30
57.62 3 16 06 16 17 45 05.7390 -28 57 52.200C QQ 3333T
//DS 4 6 0 000 0 000 0 000 0 000
//LO 51.6 13.4 3610 3910 0000
//FISVTL 62.350 62.35 42820.587000 43122.080000
//OF NOD SKY 17 45 40.0383 -29 00 28.069 C 70 30
74.66 3 16 11 42 17 46 07.7620 -28 12 38.990C QQ 3333T
//DS 4 6 0 000 0 000 0 000 0 000
//LO 51.6 13.4 3610 3910 0000
//FISVTL 66.700 66.700 42820.587000 43122.080000
//OF NOD SKY 17 45 40.0383 -29 00 28.069 C 70 30
29.-112 3 16 17 09 17 43 34.8400 -29 40 30.140C QQ 3333T
//DS 4 6 0 000 0 000 0 000 0 000
//LO 51.6 13.4 3610 3910 0000
//FISVTL -112.540 -112.540 42820.587000 43122.080000
//OF NOD SKY 17 45 40.0383 -29 00 28.069 C 70 30
31.-23 3 16 22 31 17 43 39.8300 -29 11 35.590C QQ 3333T
//DS 4 6 0 000 0 000 0 000 0 000
//LO 51.6 13.4 3610 3910 0000
//FISVTL -23.460 -23.460 42820.587000 43122.080000
//OF NOD SKY 17 45 40.0383 -29 00 28.069 C 70 30
32.-107 3 16 27 55 17 43 41.8100 -29 01 18.950C QQ 3333T
//DS 4 6 0 000 0 000 0 000 0 000
//LO 51.6 13.4 3610 3910 0000
//FISVTL -107.110 -107.110 42820.587000 43122.080000
//OF NOD SKY 17 45 40.0383 -29 00 28.069 C 70 30
34.27 3 16 33 20 17 43 50.0130 -29 01 21.180C QQ 3333T
//DS 4 6 0 000 0 000 0 000 0 000
//LO 51.6 13.4 3610 3910 0000
//FISVTL 27.590 27.590 42820.587000 43122.080000
//OF NOD SKY 17 45 40.0383 -29 00 28.069 C 70 30
44.-122 3 16 38 45 17 44 19.9190 -29 08 03.840C QQ 3333T
//DS 4 6 0 000 0 000 0 000 0 000
//LO 51.6 13.4 3610 3910 0000
//FISVTL -122.230 -122.230 42820.587000 43122.080000
//OF NOD SKY 17 45 40.0383 -29 00 28.069 C 70 30
46.-121 3 16 44 11 17 44 30.5090 -29 25 07.490C QQ 3333T
//DS 4 6 0 000 0 000 0 000 0 000
//LO 51.6 13.4 3610 3910 0000
//FISVTL -121.230 -121.230 42820.587000 43122.080000
//OF NOD SKY 17 45 40.0383 -29 00 28.069 C 70 30
49.-109 3 16 49 36 17 44 54.9530 -28 58 13.620C QQ 3333T
//DS 4 6 0 000 0 000 0 000 0 000
//LO 51.6 13.4 3610 3910 0000
//FISVTL -109.280 -109.280 42820.587000 43122.080000
//OF NOD SKY 17 45 40.0383 -29 00 28.069 C 70 30
52.-63 3 16 55 00 17 44 58.9000 -29 09 10.630C QQ 3333T
//DS 4 6 0 000 0 000 0 000 0 000
//LO 51.6 13.4 3610 3910 0000
//FISVTL -63.660 -63.660 42820.587000 43122.080000
//OF NOD SKY 17 45 40.0383 -29 00 28.069 C 70 30
59.24 3 17 00 24 17 45 13.5030 -29 05 26.750C QQ 3333T
//DS 4 6 0 000 0 000 0 000 0 000
//LO 51.6 13.4 3610 3910 0000
//FISVTL 24.330 24.330 42820.587000 43122.080000
//OF NOD SKY 17 45 40.0383 -29 00 28.069 C 70 30
66.1 3 17 05 51 17 45 32.2890 -28 33 38.740C QQ 3333T
//DS 4 6 0 000 0 000 0 000 0 000
//LO 51.6 13.4 3610 3910 0000
//FISVTL 1.520 1.520 42820.587000 43122.080000
//OF NOD SKY 17 45 40.0383 -29 00 28.069 C 70 30
72.2 3 17 11 17 17 46 05.9000 -29 36 31.390C QQ 3333T
//DS 4 6 0 000 0 000 0 000 0 000
//LO 51.6 13.4 3610 3910 0000
//FISVTL 2.610 2.610 42820.587000 43122.080000
//OF NOD SKY 17 45 40.0383 -29 00 28.069 C 70 30
75.-38 3 17 16 43 17 46 12.5030 -28 07 02.420C QQ 3333T
//DS 4 6 0 000 0 000 0 000 0 000
//LO 51.6 13.4 3610 3910 0000
//FISVTL -38.670 -38.670 42820.587000 43122.080000
//OF NOD SKY 17 45 40.0383 -29 00 28.069 C 70 30
76.-11 3 17 22 06 17 46 17.9580 -28 57 16.020C QQ 3333T
//DS 4 6 0 000 0 000 0 000 0 000
//LO 51.6 13.4 3610 3910 0000
//FISVTL -11.520 -11.520 42820.587000 43122.080000
//OF NOD SKY 17 45 40.0383 -29 00 28.069 C 70 30
79.-35 3 17 27 30 17 46 19.1320 -28 31 57.110C QQ 3333T
//DS 4 6 0 000 0 000 0 000 0 000
//LO 51.6 13.4 3610 3910 0000
//FISVTL -35.410 -35.410 42820.587000 43122.080000
//OF NOD SKY 17 45 40.0383 -29 00 28.069 C 70 30
80.-61 3 17 32 55 17 46 23.6630 -29 06 19.120C QQ 3333T
//DS 4 6 0 000 0 000 0 000 0 000
//LO 51.6 13.4 3610 3910 0000
//FISVTL -61.480 -61.480 42820.587000 43122.080000
//OF NOD SKY 17 45 40.0383 -29 00 28.069 C 70 30
93.-40 3 17 38 22 17 47 28.5500 -27 50 58.450C QQ 3333T
//DS 4 6 0 000 0 000 0 000 0 000
//LO 51.6 13.4 3610 3910 0000
//FISVTL -40.840 -40.840 42820.587000 43122.080000
//OF NOD SKY 17 45 40.0383 -29 00 28.069 C 70 30
99.-36 3 17 43 45 17 48 13.1380 -28 19 41.410C QQ 3333T
//DS 4 6 0 000 0 000 0 000 0 000
//LO 51.6 13.4 3610 3910 0000
//FISVTL -36.500 -36.500 42820.587000 43122.080000
//OF NOD SKY 17 45 40.0383 -29 00 28.069 C 70 30
106.-115 3 17 49 11 17 49 08.2100 -27 33 29.520C QQ 3333T
//DS 4 6 0 000 0 000 0 000 0 000
//LO 51.6 13.4 3610 3910 0000
//FISVTL -115.800 -115.800 42820.587000 43122.080000
//OF NOD SKY 17 45 40.0383 -29 00 28.069 C 70 30
117.17 3 17 54 34 17 51 04.0590 -27 18 51.010C QQ 3333T
//DS 4 6 0 000 0 000 0 000 0 000
//LO 51.6 13.4 3610 3910 0000
//FISVTL 17.820 17.820 42820.587000 43122.080000
//OF NOD SKY 17 45 40.0383 -29 00 28.069 C 70 30
121.-19 3 17 59 59 17 51 34.3590 -27 29 17.120C QQ 3333T
//DS 4 6 0 000 0 000 0 000 0 000
//LO 51.6 13.4 3610 3910 0000
//FISVTL -19.120 -19.120 42820.587000 43122.080000
//OF NOD SKY 17 45 40.0383 -29 00 28.069 C 70 30
| XX |
XX defines the observing frequency. Since this is a pointing scan, it should be in X-band. |
| IA |
This defines a referenced pointing scan with IF A (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. |
| 3333 |
Defines the bandwidth code for the 4 IFs, here 6.25 MHz |
| 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). |
| 6 |
The integration time in seconds. Make sure this is what you need for your observations. Please check the minimum integration time allowed. |
| 4 |
Defines the correlator mode; 4 means four
IF processing giving correlation AA, BB, CC and DD |
| VTL |
Important for spectral line: the //FI card
defines the Fluke synthesizer frequencies. V stands for velocities
according to the radio convention, T for center frequency reference
and L for an LSR rest frame. If you are observing extragalactic
targets you probably want to have "ZTB" instead of "VTL", where Z
stands for optical velocity convention (and that you define a rest
frequency in addition to velocity of the source), T as above and B for
a barycentric rest frame. |
0.000
300.250 |
Fluke A and B velocities in km/s - the velocity of your target. |
| 42820.587000
43122.080000 |
Fluke A and B line rest frequencies in MHz
- the rest frequencies of your lines. Here two transitions of SiO are
observed simultaneously (AC at v=1-0 and BD at v=2-1). |
| //OF NOD SKY |
Fast switching is determined by this
'off-set' card in 'NOD SKY' mode |
| 17 48 37.8710 -26 59
52.080 |
RA and Dec of the first source in the fast
switching cycle (here the target source). Note that in spectral line
mode you want to have the first source in the cycle to be your target,
since OBSERVE will Doppler track on the first source in this
card. |
| 17 45 40.0383 -29 00
28.069 |
RA and Dec of the second source in the
fast switching cycle (here the calibrator) |
| 2 |
The source qualifier number which here is related to..
|
3590
3890 |
.. the 2-4 GHz synthesizer (L6) frequency
in MHz (here two different values because of two observing
frequencies). At frequencies higher than L-band there is a bandpass
filter, which precludes the use of synthesizer values outside the
range of 3410 to 4060 MHz. Check that your values are within this
range.the synthesizer frequencies (two different because of two
observing frequencies). Avoid values between 3750 and 3800 which is
close to a VLA birdie. |
| 1, 3, 4 |
Other qualifier number => with other L6
frequency settings respectively. |
| 70 30 |
The amount of time spent on the first and second source in the fast switching cycle (70 sec and 30 sec respectively). Move time is included. |
|
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