| VS07c Results
Submitted checklist.txt and checklist.tex is also available |
[Summary | AIPS | Difmap ] |
| Observation code | : | VS07c | AIPS Version | : | 15OCT99 |
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| Date of Observation | : | 1999/205 | Difmap Version | : | 2.3c | |||
| Source Name | : | J2236+28 | vsop_difmap used | : | Yes | |||
| Calibration Source(s) | : | 2251+158 | ||||||
| Ground telescopes | : | HH, NT | Model Fitted to data | : | Yes | |||
| Tracking Station(s) | : | TZ | Image made | : | Yes | |||
| Correlator | : | Penticton |
| Abstract
1. Three hours of good data with NT, HH, VSOP. No TR. 2. Weak fringes on source. Several step process in calibration, removed offset delay and rate, fringe detection with 15-min solution, phase detection with 2-min on NT, 7-min on VSOP (HH ref) 3. Obtained gain factor for HH and NT using consistency with ground at 110 Mlambda with calibrator and source. 4. HH factor 34; NT factor 34, assuming VSOP at 120. No better then about 20 percent. EBF-OCT11_2005 Imaging/model abit ambiguous. VLBApls shows extended structure to west, so 'guided' model that way. Imaging gives the e/w lumps without trying. core size <0.20. weak, but probably real |
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| FRING | solint=5 dparm = 2, 4000, 2000, 0.5 |
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Found fringes in 20\% of experiment |
| FRING | solint=5 dparm = 2, 1000, 1000, 0.5 timer 1 1 15 0 1 1 21 0 |
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VSOP delay about 595 nsec, rate -30 mHz. |
| CLCAL | solint=5 dparm = 2, 4000, 2000, 0.5 |
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Applied offset in SN2 table. |
| FRING | solint=15 dparm = 2, 1000, 100, 2 |
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Best fring fit with 15-min. SN1 has 10min, SN2 has 5min |
| SNEDT/SNCOR |
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SN4 filtered out a few bad points. SN5 zero the phase. | |
| CLCAL | interp 'cube' |
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Applied modified 15-m fringe plots. Plots are shown. |
| CALIB | Solint = 2 |
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2-min CALIB for Noto. Plot is shown. |
| CALIB | Solint = 7 |
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7-min CALIB for VSOP. Plot is shown. |
| CLCAL | interp 'cube' |
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Applied CALIB results sequentially |
| CLCOR | ante 1,0 HH clcor = 34,0 ante 2,0 NT clcor = 34,0 ante 3,0 VSOP clcor = 120,0 |
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These values chosen to make 2251+158 = 8 Jy and J2236+28 = 1.3 Jy at 100 Mlambda; and VSOP baselines have about equal amplitude. Accuracy no better than 20\% |
AIPS Input Files
| Comments Very little flaging after Penticton apriori flagging needed. |
AIPS Output Files
| LISTR.LIS PRTAN.LIS UVPLT_UV.PS UVPLT_UVD.PS UVPLT_UVPA.PS |
SN_FRING01_RAT_1.PS SN_FRING01_SNR_1.PS SN_FRING01_DEL_1.PS IMAGE.FITS |
| 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? | Yes |
| Comments on Difmap processing
Difmap only used for imaging and modelfitting. All calibrations done in AIPS. Able to drag out faint VSOP fringes. EBF-OCT11_2005 Imaging/model abit ambiguous. VLBApls shows extended structure to west, so 'guided' model that way. Imaging gives the e/w lumps without trying. core size <0.20. weak, but probably real |
| Image | ||||
| Ampl, Phase vs (u,v) Distance PS (35 kb) JPEG (41 kb) |
Ampl, Phase vs Time PS (96 kb) JPEG 1, 2 |
(u,v) Coverage PS (20 kb) JPEG (27 kb) | Closure Phase vs Time PS (57 kb) JPEG 1 |
Clean Image PS (32 kb) JPEG (46 kb) |
| Modelfit | ||||
| Ampl, Phase vs (u,v) Distance PS (35 kb) JPEG (41 kb) |
Ampl, Phase vs Time PS (96 kb) JPEG 1, 2 |
(u,v) Coverage PS (20 kb) JPEG (27 kb) | Closure Phase vs Time PS (57 kb) JPEG 1 |
Image with model components PS (32 kb) JPEG (37 kb) |
More details on the Images and Modelfits are found in this page.
