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2017 Mar (c171) Redirected from GMVA/GMVA correlations/2017 March

Modified 11:34, 1 Feb 2018 by rottmann | Page History
    Table of contents
    1. 1. Correlation Status March 2017

    Correlation Status March 2017

     

    Project

    Code

    Block

    Code

    Sources

    DOYS

    UT

    Frq

    Stations

    Status

    PI

    Comment
    MN001 C171A 3C84 89-90 8:30-1:30 86 Eb,Yb,On,Mh,KVN,GB,VLBA Correlated, quality checked Nagai  
    MA009   M87 89-90 22-13 86 Eb,Yb,On,Mh,Pv,KVN,GB,VLBA Correlated, quality checked Asada  
    MB005 C171B NGC1052 90 9:30-24 86 Eb,Yb,On,Mh,Pv,GB,VLBA,Nt(7mm) Correlated, quality checked Baczko  
    MM07B C171C Fermi sources 90-92 19-18:20 86 Eb,Yb,On,Mh,Pv,KVN,GB,VLBA Correlated, quality checked Marscher  
    MG002 - OJ287 92-93 17:20-07 86 Eb,Yb,On,Mh,Pv,Aa,VLBA Correlated, quality check Gomez ALMA mode
    MB007 - Sgr* 93 03-15:20 86 Eb,Yb,Pv,GB,Aa,VLBA Correlated, quality check Brinkerink ALMA mode
    MA008 - 3C273 93-94 19-11 86 Eb,Yb,Pv,On,Mh,Aa,VLBA Correlated,  quality check Akiyama ALMA mode

     

    General comments:

    Whole session:

    • Ys has (as usual) observed  LCP only
    • Pt has fringes only in parts of the experiment and only to a few stations

    ALMA-mode:

    • MH no fringes. Strange AC indicating error in setup of firmware. MH has a rare DBBC setup.
    • Pv: used 32 MHz PFB by mistake. Not included in first run with 58 MHz sub-bands.
    • Ys fringes in MB007. Seems to have used 32 MHz PFB in other 2 observations.
    • ALMA: first time with GMVA and good fringes
    • A 2nd correlation pass was done to recover Pv and Ys: requires experimental zoom-mode and stitching of sub-bands to 58 MHz. More info under mg002.
    • 3 correlations done:
      • 58 MHz sub-bands (defined by ALMA sub-bands). No Pv and Ys data included
      • 32 MHz sub-bands to match Pv and Ys setup, correlated with all stations
      • different "zoom-bands" which cut good pieces of ALMA mode and 32 MHz mode. Has to be stitched together by new task written by J. Wagner to form again 58 MHz sub-bands. This is tranparent to the users. Correlated with all stations.
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    Comments

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    #1
    p459kri says:
    For the ALMA mode experiments some stations recorded data in the wrong mode, using PFB instead of the full band mode. Could be related to a bug in the FS, which did not recognize the command dbbc=dbbcform=full_auto.
    Correlator team will try to glue the PFB bands together so that at least part of the data can be recovered.
    Appart form the above of MH also did have a firmware problem. Therefore the Alma mode data from this station are likely to be unusable. edited 14:44, 20 Jul 2017
    Posted 09:58, 20 Jul 2017
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