| VS09x Results
Submitted checklist.txt and checklist.tex is also available |
[Summary | AIPS | Difmap ] |
| Observation code | : | VS09x | AIPS Version | : | 31DEC00 |
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| Date of Observation | : | 2000/68 | Difmap Version | : | 2.3c | |||
| Source Name | : | J1147-07 | vsop_difmap used | : | Yes | |||
| Calibration Source(s) | : | 1253-055 | ||||||
| Ground telescopes | : | Mp, Ho, Ka | Model Fitted to data | : | Yes | |||
| Tracking Station(s) | : | TZ, GZ | Image made | : | Yes | |||
| Correlator | : | Penticton |
| Abstract
Antenna gain corection factors were accomplished using scalant in DIFMAP, not CLCOR in AIPS. Hence, the FITS file does not have these corrections applied. |
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| FITLD | DIGICOR=DELCOR=-1 |
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Output file name = VS09X.FITLD |
| MSORT |
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Input file name = VS09X.FITLD, Output file name = VS09X.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) |
| ANTAB |
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For Ho had Tsys values, and estimated the DPFU. For Ka, Mp, used nominal values. For Halca, used a Tsys of 88K, 92K. | |
| APCAL |
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Input: Ty(1) + GC(1) | |
| CLCAL | OPCODE = CALP INTERPOL = 'AMBG' REFANT 4 (Mp) |
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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 to 0. | |
| TBIN |
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Read in DQA1 delay and rate solutions. | |
| SNEDT |
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Extremely minor editting of a few discrepant DQA1 solutions. | |
| CLCAL | OPCODE = CALP INTERPOL = 'AMBG' REFANT 4 (Mp) |
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| FRING | DOCALIB 1 GAINUSE 3 TIMER 0 SOLINT 4 REFANT 4 SEARCH 2,3 APARM(1)=2 APARM(7)=1 (SNR=1) DPARM(1)=3 (include baseline stacking) DPARM(2)=50 (50 ns delay window) DPARM(3)=10 (10mHz rate window) DPARM(4)=0.5 DPARM(5)=0 DPARM(6)=1 |
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Solutions looked great. |
| SNEDT |
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Minor editting. | |
| CLCAL | OPCODE='CALP' INTERPOL = 'AMBG' SMOTYPE = '' REFANT 8 |
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| SPLIT | SOURCES 'J1147-07' DOCALIB 1, GAINUSE 4 |
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Input file: VS09X.UVSRT, Output file: J1147-07.FITS, 1253-055.FITS |
| FITTP |
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Input file: J1147-07.FITS, 1253-055.FITS Output file: J1147-07.FITS, 1253-055.FITS amplitude |
AIPS Input Files
| ANTAB.TXT INDXR.TXT |
Comments - None - |
AIPS Output Files
| Phase selfcal applied? | Yes |
| Global amplitude selfcal (gscal) applied? | Yes |
| Amplitude selfcal on non-global timescales used? | Yes |
| Modelfit made and saved? | Yes |
| Image Made and saved? | Yes |
| Comments on Difmap processing
Applied a root(2) correction factor to all the antennas with scalant (NOT CLCOR in AIPS). Also, corrected Ho and Ka by factors of 1.2 and 2.8 respectively (again with scalant). Used crossing points to determine these scaling factors. Did not use gscale. Final image had a slight extension to the west, consistent with the PLS. Used UVTAPER to pick up the extended emission. When correction factor were applied the zerospacing visibilities for the fringe finder (3C279) was consistent with the AT light curve zerospacing flux. |
| Image | ||||
| Ampl, Phase vs (u,v) Distance PS (81 kb) JPEG (51 kb) |
Ampl, Phase vs Time PS (186 kb) JPEG 1, 2 |
(u,v) Coverage PS (40 kb) JPEG (31 kb) | Closure Phase vs Time PS (125 kb) JPEG 1 |
Clean Image PS (37 kb) JPEG (47 kb) |
| Modelfit | ||||
| Ampl, Phase vs (u,v) Distance PS (81 kb) JPEG (51 kb) |
Ampl, Phase vs Time PS (185 kb) JPEG 1, 2 |
(u,v) Coverage PS (40 kb) JPEG (31 kb) | Closure Phase vs Time PS (123 kb) JPEG 1 |
Image with model components PS (38 kb) JPEG (40 kb) |
More details on the Images and Modelfits are found in this page.
