| vs04q Results
Submitted checklist.txt and checklist.tex is also available |
[Summary | AIPS | Difmap ] |
| Observation code | : | vs04q | AIPS Version | : | 31DEC00 |
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| Date of Observation | : | 1999/36 | Difmap Version | : | 2.4 | |||
| Source Name | : | J1522-2730 | vsop_difmap used | : | No | |||
| Calibration Source(s) | : | 1548+056 | ||||||
| Ground telescopes | : | AT, FD, OV, PT | Model Fitted to data | : | Yes | |||
| Tracking Station(s) | : | RZ | Image made | : | Yes | |||
| Correlator | : | Socorro |
| Abstract
A slightly resolved core with some emission to the south-west. This extension is seen in lower resolution VLBI. |
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| FITLD | digicorr 1 delcorr 1 |
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| MSORT |
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| INDXR | cparm = 0, 0, 0.5, 1, 1, 0 |
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No PI letter; one tracking station, probably no scan breaks |
| OBTAB | antenna 13 subarray 1 aparm 0 |
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OB table data into the AN table |
| ACCOR | solint 2 |
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| CLCAL | opcode 'cali' interpol '2pt' refant = 3 antennas 1, 3, 9, 10, 13 |
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| VLOG |
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| ANTAB |
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gain curve information from VSOP calibration web page. Nominal Tsys used for HALCA. Slight difference between HALCA IF1 and IF2 (96 & 102 K) based on earlier experience. | |
| APCAL | antennas: 1, 3, 9, 10, 13 |
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Weather information was used. |
| CLCAL | opcode 'cali' interpol '2pt' refant = 3 antennas 1, 3, 9, 10, 13 |
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Amplitude calibration solutions applied. |
| TACOP | inext 'pc' |
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PC table 2 |
| PCLOD | outver 2 |
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PC table made, pulse-cal info added |
| PCCOR | timer 0 16 30 0 0 16 32 0 cutoff 0 refant 3 inver 2 |
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| CLCAL | opcode 'calp' interpol '2pt' refant 1 antennas 1, 3, 9, 10, 13 |
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| UVFLG |
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| FRING | docalib 1 antennas 1, 3, 9, 10, 13 dofit 1, 3, 9, 10, 13 flagver 1 gainuse 4 refant 3 search 9, 10, 1 solint 3 aparm 2, 0, 0, 0, 0, 1, 3, 0, 1, 0 dparm 3, 400, 100, 0, 1 |
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| CLCAL | antenna 1, 3, 9, 10, 13 opcode 'cali' interpol 'ambg' refant 3 |
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| SPLIT | aparm = 3, 2.06, 0, 1, 0 docalib 1 |
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Create single-source file, IFs averaged, aparm(2) from DTSUM |
| FITTP |
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Data written out for analysis in Difmap. |
AIPS Input Files
| ANTAB.TXT | Comments No PI letter, information from NRAO ftp site and from ftp.atnf.csiro.au. Flags, Tsys data, etc., are from the v008d2cal.vlba and the vlba_gains.key files. No UVFLG.TXT, but V008D2.FLAG was made by task VLOG. |
Additional Files
| Name | Description |
| V008D2.FLAG | flag file by task VLOG |
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
The image and model show two components. The major one is the core and its size is 0.25 +/- 0.05 mas in size. The secondary component is to the south-west and is seen on other VLBI images. |
| Image | ||||
| Ampl, Phase vs (u,v) Distance PS (31 kb) JPEG (37 kb) |
Ampl, Phase vs Time PS (174 kb) JPEG 1, 2, 3 |
(u,v) Coverage PS (18 kb) JPEG (28 kb) | Closure Phase vs Time PS (212 kb) JPEG 1, 2 |
Clean Image PS (35 kb) JPEG (43 kb) |
| Modelfit | ||||
| Ampl, Phase vs (u,v) Distance PS (31 kb) JPEG (37 kb) |
Ampl, Phase vs Time PS (174 kb) JPEG 1, 2, 3 |
(u,v) Coverage PS (18 kb) JPEG (28 kb) | Closure Phase vs Time PS (212 kb) JPEG 1, 2 |
Image with model components PS (38 kb) JPEG (41 kb) |
More details on the Images and Modelfits are found in this page.
