possible GW event optical counterpart

Forums Deep Sky possible GW event optical counterpart

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  • #574367
    Robin Leadbeater
    Participant

    Not quite sure where this fits but I will put it here

    There have been some interesting GCN (Gamma ray Coordinates Network) circulars generated this afternoon.  It seems there may be gamma, optical and neutrino detections coincident with a Gravitational Wave Event (S190728q) detected earlier today.  All very preliminary but I thought it might be cool to image the possible optical counterpart if you have clear skies (at mag 19.8 it is too faint for me for a spectrum unfortunately)

    The optical transient is AT2019lvs, well placed at 21:45:34.900 +20:41:26.10

    https://wis-tns.weizmann.ac.il/object/2019lvs 

    The GCN circulars can be found here 

    https://gcn.gsfc.nasa.gov/gcn3_archive.html

    and the most relevant ones are 

    25187, 25189, 25192, 25197, 25199, 21201

    Cheers

    Robin

    #581210
    Nick James
    Participant

    On a quick focus frame in a bright sky it appears to be 16.4 unfiltered now.

    #581211
    Robin Leadbeater
    Participant

    Update:

    The optical transient AT2019lvs is now reported seen by PAN-STARRS 18 hours before the GW event. There is also a faint possible precursor visible on the SDSS image so most likely just a CV and not associated with the GW event see GCN 25204

    https://gcn.gsfc.nasa.gov/gcn3/25204.gcn3

    I also see that it is now reported outside the updated region of the sky

    https://gcn.gsfc.nasa.gov/gcn3/25207.gcn3

    and as I type, spectroscopic confirmation that it is indeed a CV

    https://gcn.gsfc.nasa.gov/gcn3/25209.gcn3

    so a false alarm this time I am afraid

    Robin

    #581212
    Nick James
    Participant

    That’s a shame. Anyway, I have a deeper image here.

    #581213
    Robin Leadbeater
    Participant

    It turns out there is historic evidence from MASTER that AT2019lvs is a recurrent object with several historic outbursts 

    https://gcn.gsfc.nasa.gov/gcn3/25216.gcn3

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