MG004

    Version as of 01:49, 1 Nov 2024

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    MG004 Correlation Report

    General information

    Current Status

    Correlation finished, data is ready to be released.

    Fringes

    Station Code Fringes Plots Comments
    Ef B yes

    Fringe overview (including all of C181D) of all baselines including Ef in LL (left for each baseline) and RR (right for each baseline). Legend: white - scheduled, but no data, blue - no fringe, red-green - fringes of different quality. D -- fourfit error, in this case due to mixing upper and lower subbands in the KVN compatibility mode, no real problem with the data.

    Scans 18-20, 24-26, 28-29, 31, 33, 35-36 are missing from all diagnostic plots due to a difx2mark4 error. They are present in the final correlation products.

    c181d_FRINGE_RfAnt_Ef_LLRR_AllSrc.pdf

    Examples of fourfit fringe plots:

    c181d_No0038_1055+018_AB_LL.pdfc181d_No0038_1055+018_AB_LR.pdf,
    c181d_No0038_1055+018_AB_RL.pdfc181d_No0038_1055+018_AB_RR.pdf

     

    Same for all antennas below unless otherwise noted.

    in the plots Ef is "missing" all the baselines except to ALMA, GLT and KVN. This is due to a fourfit error, the baselines are missing only from some of the diagnostic plots, but are present in the final correlation products.
    On X yes

    c181d_FRINGE_RfAnt_On_LLRR_AllSrc.pdf

    c181d_No0038_1055+018_AX_LL.pdfc181d_No0038_1055+018_AX_LR.pdf,
    c181d_No0038_1055+018_AX_RL.pdfc181d_No0038_1055+018_AX_RR.pdf

     

    in the plots On is "missing" all the baselines except to ALMA, GLT and KVN. This is due to a fourfit error, the baselines are missing only from some of the diagnostic plots, but are present in the final correlation products.
    Ys Y yes

    c181d_FRINGE_RfAnt_Ys_LLRR_AllSrc.pdf

    c181d_No0038_1055+018_AY_LL.pdfc181d_No0038_1055+018_AY_LR.pdf,

    c181d_No0038_1055+018_AY_RL.pdfc181d_No0038_1055+018_AY_RR.pdf

     

    As usual, Ys observed LCP only, but it was also recorded as fake RCP, that's why there are common Ys "right" to other antenna's left fringes.

    in the plots Ys is "missing" all the baselines except to ALMA, GLT and KVN. This is due to a fourfit error, the baselines are missing only from some of the diagnostic plots, but are present in the final correlation products.

    Mh Z yes

    c181d_FRINGE_RfAnt_Mh_LLRR_AllSrc.pdf

    c181d_No0023_1055+018_AZ_LL.pdfc181d_No0023_1055+018_AZ_LR.pdf,

    c181d_No0023_1055+018_AZ_RL.pdfc181d_No0023_1055+018_AZ_RR.pdf

     

    in the plots Mh is "missing" all the baselines except to ALMA, GLT and KVN. This is due to a fourfit error, the baselines are missing only from some of the diagnostic plots, but are present in the final correlation products.
    Pv P yes c181d_FRINGE_RfAnt_Pv_LLRR_AllSrc.pdf in the plots Pv is "missing" all the baselines except to ALMA, GLT and KVN. This is due to a fourfit error, the baselines are missing only from some of the diagnostic plots, but are present in the final correlation products.
    VLBA: Br b yes

    c181d_FRINGE_RfAnt_Br_LLRR_AllSrc.pdf

    c181d_No0039_OJ287_Ab_LL.pdfc181d_No0039_OJ287_Ab_LR.pdf,

    c181d_No0039_OJ287_Ab_RL.pdfc181d_No0039_OJ287_Ab_RR.pdf

     

    Baselines to EVN stations are "missing" due to a fourfit error. They are present in the final correlation products.
    VLBA: Fd f yes

    c181d_FRINGE_RfAnt_Fd_LLRR_AllSrc.pdf

    c181d_No0038_1055+018_Af_LL.pdfc181d_No0038_1055+018_Af_LR.pdf,

    c181d_No0038_1055+018_Af_RL.pdfc181d_No0038_1055+018_Af_RR.pdf
    Baselines to EVN stations are "missing" due to a fourfit error. They are present in the final correlation products.
    VLBA: Kp k yes

    c181d_FRINGE_RfAnt_Kp_LLRR_AllSrc.pdf

    c181d_No0038_1055+018_Ak_LL.pdfc181d_No0038_1055+018_Ak_LR.pdf

    c181d_No0038_1055+018_Ak_RL.pdfc181d_No0038_1055+018_Ak_RR.pdf
    Baselines to EVN stations are "missing" due to a fourfit error. They are present in the final correlation products.
    VLBA: La l yes

    c181d_FRINGE_RfAnt_La_LLRR_AllSrc.pdf

    c181d_No0038_1055+018_Al_LL.pdfc181d_No0038_1055+018_Al_LR.pdf,

    c181d_No0038_1055+018_Al_RL.pdfc181d_No0038_1055+018_Al_RR.pdf

     

    Baselines to EVN stations are "missing" due to a fourfit error. They are present in the final correlation products.
    VLBA: Mk m yes

    c181d_FRINGE_RfAnt_Mk_LLRR_AllSrc.pdf

    c181d_No0039_OJ287_Am_LL.pdfc181d_No0039_OJ287_Am_LR.pdf,

    c181d_No0039_OJ287_Am_RL.pdfc181d_No0039_OJ287_Am_RR.pdf

     

    Baselines to EVN stations are "missing" due to a fourfit error. They are present in the final correlation products.

    Taken out for several scans because of USNO observing.

    General performance in c181d poor, with fringes mostly to ALMA.

    VLBA: Nl n yes

    c181d_FRINGE_RfAnt_Nl_LLRR_AllSrc.pdf

    c181d_No0038_1055+018_An_LL.pdfc181d_No0038_1055+018_An_LR.pdf,

    c181d_No0038_1055+018_An_RL.pdfc181d_No0038_1055+018_An_RR.pdf
    Baselines to EVN stations are "missing" due to a fourfit error. They are present in the final correlation products.
    VLBA: Ov o yes

    c181d_FRINGE_RfAnt_Ov_LLRR_AllSrc.pdf

    c181d_No0038_1055+018_Ao_LL.pdf, no LR finge,

    c181d_No0038_1055+018_Ao_RL.pdfc181d_No0038_1055+018_Ao_RR.pdf

     

    Baselines to EVN stations are "missing" due to a fourfit error. They are present in the final correlation products.
    VLBA: Pt p yes

    c181d_FRINGE_RfAnt_Pt_LLRR_AllSrc.pdf

    c181d_No0038_1055+018_Ap_LL.pdfc181d_No0038_1055+018_Ap_LR.pdf,

    c181d_No0038_1055+018_Ap_RL.pdfc181d_No0038_1055+018_Ap_RR.pdf

     

    Baselines to EVN stations are "missing" due to a fourfit error. They are present in the final correlation products.

    Taken out for several scans because of USNO observing.

    GBT: Gb G yes

    c181d_FRINGE_RfAnt_Gb_LLRR_AllSrc.pdf

    c181d_No0016_OJ287_AG_LL.pdfc181d_No0016_OJ287_AG_RR.pdf,

    no LR or RL fringe

    Baselines to EVN stations are "missing" due to a fourfit error. They are present in the final correlation products.

    For most of this experiment: unrecoverable read error of the Mk5 module, logs indicate bad weather, so this loss is considered non-critical

    GLT: Gl g yes

    c181d_FRINGE_RfAnt_Gl_LLRR_AllSrc.pdf

    c181d_No0038_1055+018_Ag_LL.pdfc181d_No0038_1055+018_Ag_LR.pdf,

    c181d_No0038_1055+018_Ag_RL.pdfc181d_No0038_1055+018_Ag_RR.pdf

    Data analysis has shown that GLT recorded in unknown polarization instead of circular (most probably unknown elliptic). We may be able to recover the circular pols by special postprocessing, but at this moment IT SHOULD NOT BE USED FOR ANY POLARIMETRY and in general dealt with very carefully.

    ALMA: Aa A yes

    c181d_FRINGE_RfAnt_Aa_LLRR_AllSrc.pdf

     

    c181d_No0016_OJ287_AG_LL.pdfc181d_No0016_OJ287_AG_RR.pdf,
    no LR or RL fringe

    c181d_No0023_1055+018_AZ_LL.pdfc181d_No0023_1055+018_AZ_LR.pdf,
    c181d_No0023_1055+018_AZ_RL.pdfc181d_No0023_1055+018_AZ_RR.pdf

    c181d_No0038_1055+018_AB_LL.pdfc181d_No0038_1055+018_AB_LR.pdf,
    c181d_No0038_1055+018_AB_RL.pdfc181d_No0038_1055+018_AB_RR.pdf

    c181d_No0038_1055+018_Af_LL.pdfc181d_No0038_1055+018_Af_LR.pdf,
    c181d_No0038_1055+018_Af_RL.pdfc181d_No0038_1055+018_Af_RR.pdf

    c181d_No0038_1055+018_Ag_LL.pdfc181d_No0038_1055+018_Ag_LR.pdf,
    c181d_No0038_1055+018_Ag_RL.pdfc181d_No0038_1055+018_Ag_RR.pdf

    c181d_No0038_1055+018_Ak_LL.pdfc181d_No0038_1055+018_Ak_LR.pdf
    c181d_No0038_1055+018_Ak_RL.pdfc181d_No0038_1055+018_Ak_RR.pdf

    c181d_No0038_1055+018_Al_LL.pdfc181d_No0038_1055+018_Al_LR.pdf,
    c181d_No0038_1055+018_Al_RL.pdfc181d_No0038_1055+018_Al_RR.pdf

    c181d_No0038_1055+018_An_LL.pdfc181d_No0038_1055+018_An_LR.pdf,
    c181d_No0038_1055+018_An_RL.pdfc181d_No0038_1055+018_An_RR.pdf

    c181d_No0038_1055+018_Ao_LL.pdf, no LR finge,
    c181d_No0038_1055+018_Ao_RL.pdfc181d_No0038_1055+018_Ao_RR.pdf

    c181d_No0038_1055+018_Ap_LL.pdfc181d_No0038_1055+018_Ap_LR.pdf,
    c181d_No0038_1055+018_Ap_RL.pdfc181d_No0038_1055+018_Ap_RR.pdf

    c181d_No0038_1055+018_AX_LL.pdfc181d_No0038_1055+018_AX_LR.pdf,
    c181d_No0038_1055+018_AX_RL.pdfc181d_No0038_1055+018_AX_RR.pdf

    c181d_No0038_1055+018_AY_LL.pdfc181d_No0038_1055+018_AY_LR.pdf,
    c181d_No0038_1055+018_AY_RL.pdfc181d_No0038_1055+018_AY_RR.pdf

    c181d_No0039_OJ287_Ab_LL.pdfc181d_No0039_OJ287_Ab_LR.pdf,
    c181d_No0039_OJ287_Ab_RL.pdfc181d_No0039_OJ287_Ab_RR.pdf

    c181d_No0039_OJ287_Am_LL.pdfc181d_No0039_OJ287_Am_LR.pdf,
    c181d_No0039_OJ287_Am_RL.pdfc181d_No0039_OJ287_Am_RR.pdf

    _________________________________________________________________

    Observed in linear polarization, converted to circular polarization in post-correlation uning PolConvert. For technical reasons the atmospheric correction was applied twice -- both in original ALMA data and during the correlation. Although a special procedure was developed to compensate for this, we found that its application leads to other difficulties, in particular to abnormally high fringe rate jumps, so in the final production run the double atmospheric correction was left as is.
    KVN: Kt t yes c181d_FRINGE_RfAnt_Kt_LLRR_AllSrc.pdf  
    KVN: Ku u yes c181d_FRINGE_RfAnt_Ku_LLRR_AllSrc.pdf  
    KVN: Ky y yes c181d_FRINGE_RfAnt_Ky_LLRR_AllSrc.pdf  

     

    Notes

    There were problems with some diagnostic plots of this experiment due to yet poorly understood errors of fourfit and other HOPS components. But this does not change the quality of the final correlation product.

    GLT participated in this session for the first time as a test, and serious problems were detected when analysing its data. Be very carerful when using them.

    Post-Correlation checks

    Residuals

    FITS completeness (pclist)