| VS03z Results
Submitted checklist.txt and checklist.tex is also available |
[Summary | AIPS | Difmap ] |
| Observation code | : | VS03z | AIPS Version | : | 15APR99 |
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| Date of Observation | : | 1998/211 | Difmap Version | : | 2.3c | |||
| Source Name | : | J0403-3605 | vsop_difmap used | : | No | |||
| Calibration Source(s) | : | 0420-014, 0202+149 | ||||||
| Ground telescopes | : | Ceduna, Hartebeesthoek | Model Fitted to data | : | Yes | |||
| Tracking Station(s) | : | NZ, TZ, UZ | Image made | : | Yes | |||
| Correlator | : | Penticton |
| Abstract
The source is fairly compact up to 500 Mlambda with a correlated flux density exceeding 0.5 Jy. The correlated flux density of 0.8 Jy on the shortest baseline (100 Mlambda) is less than half of the pre-launch survey value. VLBApls data show a ~2.2 Jy point source up to 100 Mlambda. The ATCA lightcurve reveals that the total flux density continuously decreased from the epoch of the VLBApls obser- vastions. Imaging was possible in spite of the poor uv-coverage (much data have been lost in the first phase selfcal). |
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| FITLD | douvcomp 1 |
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Correlator output files have already been processed with FITLD by Leonid Gurvits in JIVE (or at ISAS?). I just had to load the data at the SGO. |
| FIXWT | bif = 1 bchan = 100 detime = -1 |
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| INDXR | cparm = 0, 0, 0.25, 0 |
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Input scan break taken from PI letter. |
| TABED | inext = 'an' inver = 1 outver = 1 optyp = 'repl' aparm = 5, 0, 0, 6, 0 bcount = 2 ecount = 2 keyval = 0 |
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Correct antenna type for Hartrao (MNTSTA: altaz->0) |
| TABED | bcount = 3 ecount = 3 keyval = 2 |
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Correct antenna type for HALCA (MNTSTA: orbiter->2) |
| ANTAB | tyver = 1 gcver = 1 |
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Gain curve information from VSOP calibration web page. Nominal Tsys used for Ceduna and HALCA. |
| APCAL |
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| CLCAL | opcode = 'cali' interpol = '2pt' |
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| FRING | docalib = 1 flagver = 1 refant = 1 search = 1,2 solint = 3 aparm = 2, 0, 0, 0, 2, 1, 3, 0, 1, 0 dparm = 3, 400, 100, 0.6 |
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Found 280 good solution, failed on two. |
| CLCAL | opcode = 'cali' interpol = 'ambg' |
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| TACOP |
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Prepare a copy of CL table before amplitude scaling. | |
| CLCOR | opcode = 'gain' antenn = 0 clcorprm = 0.906, 0 |
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Gain correction for Penticton data correlated before 14 Feb 1999. |
| SPLIT | aparm = 2, 0.6, 0, 1, 0 |
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Only data for J0403-36 are available. |
| FITTP |
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Data written out for analysis in Difmap. |
AIPS Input Files
| ANTAB.TXT INDXR.TXT |
Comments No measured Tsys for AT, MP and HALCA, nominal values are used. |
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
Data were processed according to the survey standards. Imaging was quite straightforward, in spite of that three stations were available for only a short time (~2 hours). A Gaussian and a circular component was fitted to the visibility data. |
| Image | ||||
| Ampl, Phase vs (u,v) Distance PS (25 kb) GIF (6 kb) |
Ampl, Phase vs Time PS (74 kb) GIF 1, 2 |
(u,v) Coverage PS (15 kb) GIF (4 kb) | Closure Phase vs Time PS (43 kb) GIF 1 |
Clean Image PS (34 kb) GIF (50 kb) |
| Modelfit | ||||
| Ampl, Phase vs (u,v) Distance PS (25 kb) GIF (6 kb) |
Ampl, Phase vs Time PS (74 kb) GIF 1, 2 |
(u,v) Coverage PS (15 kb) GIF (4 kb) | Closure Phase vs Time PS (43 kb) GIF 1 |
Image with model components PS (33 kb) GIF (7 kb) |
More details on the Images and Modelfits are found in this page.
