| VS02t Results
Submitted checklist.txt and checklist.tex is also available |
[Summary | AIPS | Difmap ] |
| Observation code | : | VS02t | AIPS Version | : | 15OCT98 |
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| Date of Observation | : | 1998/182 | Difmap Version | : | 2.3c | |||
| Source Name | : | J0108+01 | vsop_difmap used | : | Yes | |||
| Calibration Source(s) | : | 0420-014 | ||||||
| Ground telescopes | : | Hobart, Seshan25 | Model Fitted to data | : | Yes | |||
| Tracking Station(s) | : | TZ,RZ | Image made | : | No | |||
| Correlator | : | Penticton |
| Abstract
Fringes were only detected on 2 baselines. (One was the ground-ground baseline Hobart-Seshan25. The other was ground-space baseline to Seshan25 with good space fringes detected during the TZ pass and weak fringes seen with the RZ pass.) As a result, no any image was made. The survey source (J0108+01) has a correlated flux density of 0.7Jy on a ground baseline Hobart-Seshan25 of 7,200km, and a correlated flux density of 0.45Jy and 0.15Jy at a spacing of 15,600km and 23,000km correspondingly, on the space baseline to Seshan25. The calibrator (0420-014) has an 18-min data on the ground baseline Hobart-Seshan25 (about 7,600km) with a correlated flux density of 1.1Jy. Changed checklist. Two AIPS versions were given in the "AIPS Version used" question (15OCT98 and 15APR99). Changed to 15OCT98 to allow checklist to be accepted. RGD 10-03-2005 Fitted a model, and phase calibrated on 2 minute time scale (selffal fal,2,2) to prevent data being flagged. |
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| FITLD | douvcomp=1;dotable=1 |
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load the uv FITS data with 15APR99 version AIPS to overcome the timestamp problem when the first FITS file ran cross the 24-hour boundary. Later data reduction was kept with 15OCT98 version. |
| MSORT | sort='TB' |
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sort the data to 'TB' order |
| INDXR | cparm(3)=1 |
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index uv data with 1 min CL entry interval |
| TACOP |
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protect original CL1 | |
| ANTAB |
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determine the Tsys and gain curve (see ANTAB.TXT file). Tsys=95K for Halca. | |
| APCAL | opcode=' ' |
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generate an amplitude calibration solution table |
| CLCAL | opcode='CALI' interpol=' ' refant=3 |
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apply amplitude calibration solution |
| FRING | docalib=1 flagv=1;solint=4;refant=3 aparm=2,0,0,0,0,1,2,0 dparm=1,500,0 antwt=1,30,1 |
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fringe fit in narrow searching windows |
| CLCAL | opcode='CALP';interpol='AMBG';smotype='VLBI' refant=3 cals=sour='0420-014' (cals=sour=J0108+01') |
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apply solution from FRING -- 2 times for 2 sources |
| TACOP |
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save calibration table | |
| CLCOR | antenna=0;opcode='GAIN';clcorprm=0.91,0 |
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Penticton gain correction |
| TASAV |
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copy all extension tables to a dummy file | |
| SPLIT | docalib=1;douvcomp=1;aparm=2,0,0,1,0 |
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make calibrated single-source data files: J0108+01.SPLIT and 0420-014.SPLIT |
| FITTP |
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export each single-source file in FITS format to disk file for further imaging analysis |
AIPS Input Files
| INDXR.TXT ANTAB.TXT |
Comments - None - |
AIPS Output Files
| Phase selfcal applied? | No |
| Global amplitude selfcal (gscal) applied? | No |
| Amplitude selfcal on non-global timescales used? | No |
| Modelfit made and saved? | Yes |
| Image Made and saved? | No |
| Comments on Difmap processing
No DIFMAP imaging processing was run as only two baselines were available. The survey source (J0108+01) has a correlated flux density of 0.7Jy on a ground baseline Hobart-Seshan25 of 7,200km, and a correlated flux density of 0.45Jy and 0.15Jy at a spacing of 15,600km and 23,000km correspondingly, on the space baseline to Seshan25. The calibrator (0420-014) has an 18-min data on the ground baseline Hobart-Seshan25 (about 7,600km) with a correlated flux density of 1.1Jy. |
| Modelfit | ||||
| Ampl, Phase vs (u,v) Distance PS (23 kb) JPEG (38 kb) |
Ampl, Phase vs Time PS (73 kb) JPEG 1, 2 |
(u,v) Coverage PS (13 kb) JPEG (24 kb) | Closure Phase vs Time PS (826 bytes) JPEG 1 |
Image with model components PS (30 kb) JPEG (36 kb) |
More details on the Images and Modelfits are found in this page.
