Table of contents
- 1. MK013B Correlation Report
- 1.1. General information
- 1.2. Status
- 1.3. Fringes
- 1.4. Notes
- 1.5. Post-Correlation checks
- 1.5.1. Residuals
- 1.5.2. FITS completeness (pclist)
MK013B Correlation Report
General information
- Session info: http://www3.mpifr-bonn.mpg.de/div/vlbi/globalmm/
- PI: Kim
- Targets: M87
- Stations: VLBA with GBT, EVN Ef Mh Pv, KVN Kt Ku Ky, GLT; not observed by On and Ys
- Phased arrays: ALMA, NOEMA
- Station feedback: https://www3.mpifr-bonn.mpg.de/div/vlbi/globalmm/sessions/apr21/feedback_apr21.asc
- Mixed-polarization baselines to ALMA were polconverted to circular using APP QA2 package:
MK013B_M87_a_03_TM1-20210614.APP_DELIVERABLES.tgz - The final FITS-IDI and HOPS data releases are correlation rev1 polconversion v1
- The included ANTAB files are as provided by the stations, and that of ALMA was generated by PolConvert
Status
| what | date |
|---|---|
| releases of rev1v1 | |
| polconversion v1 and packaging of release | 13.06.2022 |
| correlation rev1 ALMA scans, after ALMA 3 MHz tuning error became known | 27.01.2022 |
| correlation rev1 non-ALMA part | 15.12.2022 |
Fringes
| Station | Code | Fringes | Plots | Comments |
|---|---|---|---|---|
| ALMA, NOEMA | yes | No0056 AaNn | ||
| Effelsberg | yes | No0056 EfNn | ||
| Pico Veleta | yes | No0056 NnPv | ||
| Metsähovi | yes | No0059 MhNn | ||
| VLBA all stations incl. GBT | yes | No0076 Aa-Gb-VLBA | ||
| Greenland GLT | yes | No0049 Aa-Gl | ||
| KVN all stations | yes | No0001 KVN-NOEMA | ||
Notes
ALMA tuning was incorrect by an integer 3 MHz.
Baselines to ALMA have a relatively high residual fringe rate. This should be addressed in AIPS/CASA postprocessing. Origin unclear. Coordinates for ALMA correct.
ALMA VLBI baselines were polconverted using DiFX 2.7.1 PolConvert and the APP QA2 package MK013B_M87_a_03_TM1-20210614.APP_DELIVERABLES.tgz.
The ALMA ANTAB data are as generated by PolConvert for each 64 MHz band.
The experiment was correlated in DiFX in two parts to get a 64 MHz FITS-IDI IF bandwidth:
- Scans without ALMA were correlated under DiFX 2.6.2, using 64 MHz zoom bands
- Scans where ALMA participated i.e. No0031--No0079 except No0056 and No0072 (ALMA: 62.5 MHz recordings) were correlated under DiFX 2.7.0 (equiv. to DiFX 2.7.1) and the "outputbands" feature synthesized 64 MHz wide bands
- The two (sub)correlations were merged into correlation rev1
Post-Correlation checks
Residuals
|
Relative to Effelsberg |
Relative to ALMA |
|
Relative to NOEMA |
Relative to VLBA_PT |
