| VS08v Results
Submitted checklist.txt and checklist.tex is also available |
[Summary | AIPS | Difmap ] |
| Observation code | : | VS08v | AIPS Version | : | 15APR99 |
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| Date of Observation | : | 2000/319 | Difmap Version | : | 2.4a | |||
| Source Name | : | J2101+0341 | vsop_difmap used | : | No | |||
| Calibration Source(s) | : | J1733-1304 | ||||||
| Ground telescopes | : | HOBART, KASHIMA, SESHAN25 | Model Fitted to data | : | Yes | |||
| Tracking Station(s) | : | RZ | Image made | : | Yes | |||
| Correlator | : | Pentincton |
| Abstract
Mopra data were not sent to the correlator because of incorrect IF filter setup. There were no fringes found for Hobart at the correlator but I tried it anyway. Later it turned out from the station logfile that the S2 clock at Hobart was 2s wrong. Fringes were found for Kashima, Shanghai, and HALCA. The amplitude calibration seems to be OK: the ATCA total flux density was 0.685 Jy in Feb 1998, in agreement with the VSOP observations on the short Kashima-Sheshan25 baseline. The source was quite compact because the correlated flux density was 0.5 Jy up to 340 Mlambda. A single Gaussian component has been fitted to the data. |
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| FITLD | douvcomp 1 |
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Data received on DAT tape from Leonid Gurvits (JIVE). This tape has been sent back to ISAS after loading data into AIPS. |
| FIXWT | bif = 1 bchan = 100 detime = -1 |
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| INDXR | cparm = 0, 0, 0.25, 0 |
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There was only a single tracking pass, scan breaking was not necessary. |
| TABED | bcount = 1 ecount = 1 keyval = 0 |
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Correct antenna type for HOBART (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 Kashima and HALCA. Tsys values were available for Hobart and Seshan25. |
| APCAL | tyver = 1 gcver = 1 |
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| CLCAL | opcode = 'cali' interpol = '2pt' |
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| FRING | docalib = 1 flagver = 1 refant = 2 search = 2,4 solint = 3 aparm = 2, 0, 0, 0, 2, 1, 3, 0, 1 dparm = 3, 400, 100, 1.0 |
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Practically no fringes for Hobart, though sometimes SNR is high enough. |
| CLCAL | opcode = 'cali' interpol = '2pt' refant 2 |
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| SPLIT | aparm = 2, 1, 0, 1, 0 sources 'J1733-13' '' |
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Calibrator source. |
| SPLIT | aparm = 2, 1, 0, 1, 0 sources 'J2101+03' '' |
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Target source. |
| FITTP |
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Data written out for analysis in Difmap. |
AIPS Input Files
| 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
Hobart was flagged. No structure could be identified in imaging. The source seems to be very compact anyway. |
| Image | ||||
| Ampl, Phase vs (u,v) Distance PS (25 kb) JPEG (39 kb) |
Ampl, Phase vs Time PS (136 kb) JPEG 1, 2 |
(u,v) Coverage PS (12 kb) JPEG (23 kb) | Closure Phase vs Time PS (118 kb) JPEG 1 |
Clean Image PS (33 kb) JPEG (44 kb) |
| Modelfit | ||||
| Ampl, Phase vs (u,v) Distance PS (20 kb) JPEG (39 kb) |
Ampl, Phase vs Time PS (130 kb) JPEG 1, 2 |
(u,v) Coverage PS (12 kb) JPEG (23 kb) | Closure Phase vs Time PS (114 kb) JPEG 1 |
Image with model components PS (825 bytes) JPEG (0 bytes) |
More details on the Images and Modelfits are found in this page.
