| VS03e Results
Submitted checklist.txt and checklist.tex is also available |
[Summary | AIPS | Difmap ] |
| Observation code | : | VS03e | AIPS Version | : | 15APR99 |
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| Date of Observation | : | 1998/231 | Difmap Version | : | 2.3c | |||
| Source Name | : | J0405-13 | vsop_difmap used | : | Yes | |||
| Calibration Source(s) | : | 0420-014 | ||||||
| Ground telescopes | : | Sh, Mp | Model Fitted to data | : | Yes | |||
| Tracking Station(s) | : | RZ, GZ | Image made | : | Yes | |||
| Correlator | : | Penticton |
| Abstract
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| FITLD | DIGICOR=DELCOR=-1 |
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Output file name = VS03E.FITLD |
| MSORT |
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Input file name = VS03E.FITLD, Output file name = VS03E.UVSRT | |
| FIXWT | CPARM(1)=3 CPARM(3)=0.25 = Cl table time interval |
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Input file name = VS03E.UVSRT, Output file name = VS03E.FIXWT |
| INDXR |
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Created NX(1) | |
| OBTAB |
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Not Used | |
| TABPUT |
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Changed entries in AN(1) for MNTSTA, ie: VSOP_SC from 3 to 2, | |
| UVFLG | TIMER 0 18 0 0 0 23 0 0 ANTENNAS 0 BASELINE 0 OPCODE 'REAS' REASON 'NO PRC/LOW DVA' |
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Unflagged all the data in the second tracking pass that was flagged due to 'NO PRC/LOW DVA'. This was due to a bad transport (cf. the PI letter), so this data should be ok, but with a slightly lower SNR. |
| IBLED |
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Edits stored in FG(1). | |
| ACCOR |
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Not Used | |
| ANTAB |
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INFILE='CAL:VS03E_CAL.DAT'. Output sent to TY(1) and GC(1). For Halca, used a nominal Tsys' values of 95K, 98K for IF1, IF2. Shifted two Tsys values for Sh by 5 minutes so ANTAB would apply them. | |
| APCAL |
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Input: Ty(1) + GC(1) | |
| SNSMO |
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Did not use | |
| CLCAL | OPCODE = CALI INTERPOL = 2PT REFANT 2 (Sechan) |
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| TACOP |
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| CLCOR | ANTENNAS=0 OPCODE=GAIN CLCORPRM=0.9055 GAINVER=3 |
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Correction for Van Vleck normalization. |
| CLCOR | OPCODE='SBDL' ANTENNAS = 1 (Hart) CLCORPRM= 164, 164 GAINVER=3 |
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| CLCOR | OPCODE='SBDL' ANTENNAS = 1 (Halca) CLCORPRM= 158, 158 GAINVER=3 |
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| CLCOR | OPCODE='SBDL' ANTENNAS = 3 (Mopra) CLCORPRM= -109, -109 GAINVER=3 |
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| FRING | APARM(1)=2 APARM(7)=3 (SNR=3) APARM(9)=1 DPARM(1)=1 (no baseline stacking) DPARM(2)=300 (300ns delay window) DPARM(3)=100 (100mHz rate window) DPARM(4)=0.5 (0.5 sec integration time) DPARM(6)=1 (don't average in frequency) BCHAN 0, ECHAN 0 SEARCH 3 REFANT 2 (Seshan) |
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These are the standard parameters I used (unless otherwise specified). |
| FRING | Standard+ SOLINT=5 TIMER 0 18 30 0 0 19 0 0 DOCALIB 1, GAINUSE 3 |
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Got good solutions (ground SNRs were on the order of 80, space-ground SNRs were on the order of 10). Abs(delay) less than 25ns, Abs(rate) less than 25mHz. |
| FRING | Standard+ SOLINT=5 DPARM(2)=200 DOCALIB 1, GAINUSE 3 |
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Solutions look good. |
| SNEDT |
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Did not use/need. | |
| CLCAL | OPCODE='CALI' INTERPOL = '2PT' REFANT 2 |
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| CALIB |
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Not used. | |
| TASAV |
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Input file: VS03E.FIXWT, Output file: VS03E.TABLES | |
| SPLIT | SOURCES 'J0405-13' BCHAN 0, ECHAN 0 DOCALIB 1, GAINUSE 4 APARM(1)=2 (average each IF separately) APARM(2)=0.5 APARM(4)=1 |
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Input file: VS03E.FIXWT, Output file: J0405-13.FITS |
| FITTP |
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Input file: VS03E.FITS, Output file: FITS:J0405-13.FITS |
AIPS Input Files
| ANTAB.TXT INDXR.TXT |
Comments - None - |
Additional Files
| Name | Description |
| image.ps.gz | The final Difmap image (gzipped). |
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? | Yes |
| Comments on Difmap processing
Ran uvaver 30,true (averaged over 30 seconds and redo the weights). Did not try amp-self-cal, since there were not enough antennas. Did not add any clean components outside of the core, since I could not tell if they were real, or sidelobes. Final image: Core was slightly resolved, with component in roughly a NNE-SSW direction. Peak core amplitude was 0.358 Jy/beam. There was possibly an additional component to the NE, although it was difficult to determine if it was real or not. |
| Image | ||||
| Ampl, Phase vs (u,v) Distance PS (28 kb) JPEG (38 kb) |
Ampl, Phase vs Time PS (82 kb) JPEG 1, 2 |
(u,v) Coverage PS (15 kb) JPEG (26 kb) | Closure Phase vs Time PS (52 kb) JPEG 1 |
Clean Image PS (41 kb) JPEG (44 kb) |
| Modelfit | ||||
| Ampl, Phase vs (u,v) Distance PS (28 kb) JPEG (39 kb) |
Ampl, Phase vs Time PS (83 kb) JPEG 1, 2 |
(u,v) Coverage PS (15 kb) JPEG (26 kb) | Closure Phase vs Time PS (52 kb) JPEG 1 |
Image with model components PS (47 kb) JPEG (42 kb) |
More details on the Images and Modelfits are found in this page.
