| VS09O Results
Submitted checklist.txt and checklist.tex is also available |
[Summary | AIPS | Difmap ] |
| Observation code | : | VS09O | AIPS Version | : | 31DEC00 |
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| Date of Observation | : | 2002/357 | Difmap Version | : | 2.3c | |||
| Source Name | : | J0253-54 | vsop_difmap used | : | Yes | |||
| Calibration Source(s) | : | J0334-40,J0635-75 | ||||||
| Ground telescopes | : | Mp, Ho, Hh | 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 = VS09O.FITLD |
| MSORT |
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Input file name = VS09O.FITLD, Output file name = VS09O.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 Ho used tsys=175, DPFU=0.1. Had measured tsys values for Mp and Hh. For HALCA used a Tsys of 88K, 92K. | |
| APCAL |
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Input: Ty(1) + GC(1) | |
| SNEDT |
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Editted some anomalous Tsys' | |
| CLCAL | OPCODE = CALP INTERPOL = 'AMBG' REFANT 2 (Ho) |
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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, and changed Ho and Hh to 0. | |
| TBIN |
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Read in DQA1 delay and rate solutions. | |
| SNEDT |
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Extremely minor editting. | |
| CLCAL | OPCODE = CALP INTERPOL = 'AMBG' REFANT 2 (Ho) |
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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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Solutions looked ok...but there was more scatter in these solutions than in the DQA1 solutions. Use DQA1 solutions instead. Possms for these solutions also looked worse than the possms from the DQA1 solutions. |
| SPLIT | SOURCES 'J0253-54' DOCALIB 1, GAINUSE 4 |
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Input file: VS09O.UVSRT, Output file: J0253-54.FITS, J0334-40,J0635-75.FITS |
| FITTP |
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Input file: J0253-54.FITS, J0334-40,J0635-75.FITS Output file: J0253-54.FITS, J0334-40,J0635-75.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
Looking at calibrator J0635-75 the short spacing amplitude looked to be low by about a factor of 8 (Ho, Mp baseline). For the target source, crossing points with Ho and Mp to other baselines were also out by a factor of 8 (Mp was low). ANTAB file for Mp looked ok!?! Nevertheless, multiplied up Mp by a factor of 8 with scalant to make the radplots sane. |
| Image | ||||
| Ampl, Phase vs (u,v) Distance PS (34 kb) JPEG (38 kb) |
Ampl, Phase vs Time PS (127 kb) JPEG 1, 2 |
(u,v) Coverage PS (19 kb) JPEG (26 kb) | Closure Phase vs Time PS (100 kb) JPEG 1 |
Clean Image PS (39 kb) JPEG (48 kb) |
| Modelfit | ||||
| Ampl, Phase vs (u,v) Distance PS (34 kb) JPEG (38 kb) |
Ampl, Phase vs Time PS (126 kb) JPEG 1, 2 |
(u,v) Coverage PS (19 kb) JPEG (26 kb) | Closure Phase vs Time PS (100 kb) JPEG 1 |
Image with model components PS (46 kb) JPEG (42 kb) |
More details on the Images and Modelfits are found in this page.
