| VS01m Results
Submitted checklist.txt and checklist.tex is also available |
[Summary | AIPS | Difmap ] |
| Observation code | : | VS01m | AIPS Version | : | 15Apr99 |
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| Date of Observation | : | 1997/251 | Difmap Version | : | 2.3c | |||
| Source Name | : | nrao530 | vsop_difmap used | : | Yes | |||
| Calibration Source(s) | : | |||||||
| Ground telescopes | : | AT, Mp, Ud | Model Fitted to data | : | Yes | |||
| Tracking Station(s) | : | UZ | Image made | : | Yes | |||
| Correlator | : | Penticton |
| Abstract
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| FITLD | DIGICOR=DELCOR=-1 |
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Output file name = VS01m.FITLD |
| MSORT |
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Input file name = VS01m.FITLD, Output file name = VS01m.UVSRT | |
| FIXWT |
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Not used. | |
| INDXR |
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Created NX(1) | |
| ANTAB |
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Used Tsys values of 95,99K for Halca. For the AT, five telescopes observed until 07:57:35, after which all six telescopes observed. The tsys value was adjusted to reflect this. A nominal six telescope SEFD of 80Jy was used for the AT. For Ud and Mp, had actual Tsys values. Output sent to TY(1) and GC(1). | |
| APCAL |
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Input: Ty(1) + GC(1) | |
| CLCAL | OPCODE = CALP INTERPOL = 'AMBG' REFANT 6 (Usuda) |
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| TBOUT | INEXT = 'AN' |
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| TBIN |
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Changed MNTSTA entries in the AN table. Changed Halca from 3 to 2, and changed Hobart from 2 to 0. | |
| TBIN |
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Read in DQA1 delay and rate solutions. | |
| CLCAL | OPCODE = CALP INTERPOL = 'AMBG' REFANT 6 (Usuda) |
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| FRING | DOCALIB 1 GAINUSE 3 REFANT 6 (Usuda) SEARCH 2,4 SOLINT 1 APARM(1)=2 APARM(7)=3 (SNR=3) APARM(9)=1 DPARM(1)=3 (include baseline stacking) DPARM(2)=50 (50ns delay window!) DPARM(3)=50 (50mHz rate window) DPARM(4)=0.5 (0.5 sec integration time) DPARM(6)=1 (don't average in frequency) BCHAN 0, ECHAN 0 |
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Solutions looked great! abs(rate) was less than 20mHz, abs(delay) was less than 2ns. |
| SNEDT |
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| CLCAL | OPCODE='CALP' INTERPOL = 'AMBG' SMOTYPE = '' REFANT 2 |
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| TACOP |
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| CLCOR | ANTENNAS=0 OPCODE=GAIN CLCORPRM=0.9055 GAINVER=5 |
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Van-Vleck normalization correction. |
| CLCOR | ANTENNAS=0 OPCODE=GAIN CLCORPRM=1.265 GAINVER=5 |
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Global correction to pull short-spacing visibilities (2 Mlambdas) in line with Sept. 97' AT light curve flux density. |
| CLCOR | ANTENNAS=4 OPCODE=GAIN CLCORPRM=0.66 GAINVER=5 |
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Mp baselines were 1.5 times as large as similar AT baselines. |
| SPLIT | SOURCES 'J0115-01' 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: VS01m.FIXWT, Output file: J0115-01.FITS |
| FITTP |
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Input file: VS01m.FITS, Output file: J0115-01.FITS amplitude |
AIPS Input Files
| ANTAB.TXT INDXR.TXT |
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
Used UVtaper at 0.5 on 100Mlambdas to clean out the extended flux, then eliminated the taper in later iterations of clean/self-cal. However, still could not pick up all the extended emission, so amp self-cal was not run Final image: Had a 2.51Jy/beam core, with a jet extending to the north and slightly east. |
| Image | ||||
| Ampl, Phase vs (u,v) Distance PS (62 kb) JPEG (37 kb) |
Ampl, Phase vs Time PS (164 kb) JPEG 1, 2 |
(u,v) Coverage PS (31 kb) JPEG (27 kb) | Closure Phase vs Time PS (125 kb) JPEG 1 |
Clean Image PS (274 kb) JPEG (122 kb) |
| Modelfit | ||||
| Ampl, Phase vs (u,v) Distance PS (62 kb) JPEG (38 kb) |
Ampl, Phase vs Time PS (164 kb) JPEG 1, 2 |
(u,v) Coverage PS (31 kb) JPEG (27 kb) | Closure Phase vs Time PS (125 kb) JPEG 1 |
Image with model components PS (52 kb) JPEG (45 kb) |
More details on the Images and Modelfits are found in this page.
