| VS13a Results
Submitted checklist.txt and checklist.tex is also available |
[Summary | AIPS | Difmap ] |
| Observation code | : | VS13a | AIPS Version | : | 31DEC00 |
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| Date of Observation | : | 2002/204 | Difmap Version | : | 2.3c | |||
| Source Name | : | J0013+40 | vsop_difmap used | : | Yes | |||
| Calibration Source(s) | : | J0136+47,J0423-01 | ||||||
| Ground telescopes | : | Ka, Kl, Nt | Model Fitted to data | : | Yes | |||
| Tracking Station(s) | : | UZ | Image made | : | Yes | |||
| Correlator | : | Penticton |
| Abstract
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| FITLD | DIGICOR=DELCOR=-1 |
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Output file name = VS13A.FITLD |
| MSORT |
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Input file name = VS13a.FITLD, Output file name = VS13a.UVSRT | |
| FIXWT |
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Not done. | |
| INDXR | CPARM(1)=3 CPARM(2)=60 CPARM(3)=0.25 |
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Created NX(1), no CSEs |
| ANTAB |
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For Nt used tsys=50. For HALCA used a Tsys of 88K, 92K. For Kz and Ka used nominal tys' of 50K and 171K respectively. | |
| APCAL |
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Input: Ty(1) + GC(1) | |
| CLCAL | OPCODE = CALP INTERPOL = 'AMBG' REFANT 2 (Ka) |
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| TBOUT | INEXT = 'AN' |
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| TBIN |
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Changed MNTSTA entries in the AN table. Changed Halca from 3 to 2. | |
| TBIN |
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Read in DQA1 delay and rate solutions. Decided to change the refant to Kalyazin (2). | |
| SNEDT |
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Minor editting. | |
| CLCAL | OPCODE = CALP INTERPOL = 'AMBG' REFANT 2 (Kz) |
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| FRING | DOCALIB 1 GAINUSE 3 TIMER 0 SOLINT 5 REFANT 2 SEARCH 1,3 APARM(1)=2 APARM(7)=3 (SNR=3) DPARM(1)=3 (include baseline stacking) DPARM(2)=100 (100 ns delay window) DPARM(3)=20 (20mHz rate window) DPARM(4)=0.5 DPARM(5)=0 DPARM(6)=1 |
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Didn't bother running fring. DQA1 solutions looked good, and the last experiment I did VS09o had better possms without FRING than with FRING. |
| SPLIT | SOURCES 'J0013+40.FITS,J0136+47.FITS,J0423-01.FITS' DOCALIB 1, GAINUSE 3 |
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Input file: VS13a.UVSRT, Output file: J0013+40.FITS, J0136+47.FITS, J0423-01.FITS |
| FITTP |
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Input file: J0013+40.FITS, J0136+47.FITS, J0423-01.FITS Output file: J0013+40.FITS, J0136+47.FITS, J0423-01.FITS amplitude |
AIPS Input Files
| ANTAB.TXT INDXR.TXT |
Comments - None - |
AIPS Output Files
| Phase selfcal applied? | Yes |
| Global amplitude selfcal (gscal) applied? | No |
| Amplitude selfcal on non-global timescales used? | No |
| Modelfit made and saved? | Yes |
| Image Made and saved? | Yes |
| Comments on Difmap processing
Visibility amplitudes for the source seems a little low by about a half (based upon the PLS). However, amps of both calibrators seem about right. So assume the diff in amplitude of the source is just due to variability. Not really any good crossing points. |
| Image | ||||
| Ampl, Phase vs (u,v) Distance PS (64 kb) JPEG (52 kb) |
Ampl, Phase vs Time PS (168 kb) JPEG 1, 2 |
(u,v) Coverage PS (34 kb) JPEG (33 kb) | Closure Phase vs Time PS (116 kb) JPEG 1 |
Clean Image PS (42 kb) JPEG (46 kb) |
| Modelfit | ||||
| Ampl, Phase vs (u,v) Distance PS (64 kb) JPEG (52 kb) |
Ampl, Phase vs Time PS (168 kb) JPEG 1, 2 |
(u,v) Coverage PS (34 kb) JPEG (33 kb) | Closure Phase vs Time PS (115 kb) JPEG 1 |
Image with model components PS (40 kb) JPEG (40 kb) |
More details on the Images and Modelfits are found in this page.
