| VS07U Results
Submitted checklist.txt and checklist.tex is also available |
[Summary | AIPS | Difmap ] |
| Observation code | : | VS07U | AIPS Version | : | 15APR99 |
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| Date of Observation | : | 1999/224 | Difmap Version | : | 2.3c | |||
| Source Name | : | J0042+23 | vsop_difmap used | : | Yes | |||
| Calibration Source(s) | : | 0202+149 | ||||||
| Ground telescopes | : | MOP, SES, | Model Fitted to data | : | Yes | |||
| Tracking Station(s) | : | NZ | Image made | : | No | |||
| Correlator | : | Penticton |
| Abstract
Space fringes were hard to find, but solutions were found near the single good point in the DQA1. I speculate that the poor nature of the phases for VSOP represent the quality of the solution. However with these few baselines, a complicated model was not needed. A simple gaussian was the final model. 0202+149 matches (to 0.1 Jy) the observations of two days before. (VS07T) |
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| FITLD | douvcomp = 1; clint = 0.25 ; digicor = -1; delcorr = -1 |
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Created VS07U.MULTI.1 |
| MSORT |
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| INDXR | cparm = 0, 0, 0.25 |
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No INDXR.TXT |
| ANTAB |
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logs2keyin.pl used for mopra Tsys | |
| APCAL |
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| CLCAL | refant=1;opcode='calp';smotyp='ampl';interpol='box';intp=0.25; |
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Amplitude calibration and smoothing applied. |
| TACOP |
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Copy CL tables | |
| CLCOR | antennas=2,0;opcode='sbdl';clcorprm |
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Delay correction for VSOP, referenced to Mopra. From single point in one IF. Seems to work tho. |
| KRING | cparm 0,0,2,200,200,-1,-1,-1,-1,0;refant=1; bparm(5)=0.5;solint 300;SOLTYPE 'NOLS' |
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No LSS. Prelim work has shown that the frings are close to zero (now). bparm(5)=0.5 has to be set. |
| KRING | cparm 0,0,2,200,200,-1,-1,-1,-1,0;refant=1; bparm(5)=0.5;solint 600;SOLTYPE 'NOLS' |
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No LSS. Prelim work has shown that the frings are close to zero (now). bparm(5)=0.5 has to be set. |
| SNEDT | solint 0 |
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Remove bad solutions, of which there are many. The "good" ones are all near zero |
| CLCAL | interpol 'ambg';intparm=0;smotype='VLBI'; opcode='CALP';refant 1 |
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no smoothing applied, just interpolate the edited points. |
| KRING | cparm 0,0,2,100,100,0.1,0.1,-1,-1,0 bparm(5)=0.5;solint 600;SOLTYPE ''; |
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With LSS. check over a small region. |
| SNEDT | solint 0 |
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Remove bad solutions, of which there are many. The "good" ones are all near zero |
| CLCAL | interpol 'ambg';intparm=0.25;smotype='VLBI'; opcode='CALP'; |
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| POSSM | timer 0 17 0 0 0 17 30 0; solint 10 |
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Check the Pass band over 30 mins. |
| UVFLG | antenna 3,0;bchan 1;echan 20; |
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remove bottom 20 chans of Shanghi. |
| SPLIT | aparm(1)=1; |
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Av within IF |
| FITTP |
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All three sources written out for analysis in Difmap |
AIPS Input Files
| INDXR.TXT | Comments Only the first VS07U PI is available. Hobart did not observe. |
Additional Files
| Name | Description |
| SUR_7U.0JP | Survey run file |
AIPS Output Files
| Phase selfcal applied? | Yes |
| Global amplitude selfcal (gscal) applied? | Yes |
| Amplitude selfcal on non-global timescales used? | No |
| Modelfit made and saved? | Yes |
| Image Made and saved? | No |
| Comments on Difmap processing
J0042+23: two points sources and a single gaussian were tried. The single was preferred. B0202+149: Matches the VS07T experiment values. No modelfit possible (single baseline). |
| Modelfit | ||||
| Ampl, Phase vs (u,v) Distance PS (24 kb) GIF (6 kb) |
Ampl, Phase vs Time PS (87 kb) GIF 1, 2 |
(u,v) Coverage PS (14 kb) GIF (4 kb) | Closure Phase vs Time PS (50 kb) GIF 1 |
Image with model components PS (31 kb) GIF (7 kb) |
More details on the Images and Modelfits are found in this page.
