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possible GW event optical counterpart

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Robin Leadbeater's picture
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Joined: 05/03/2014 - 00:50
possible GW event optical counterpart

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

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Joined: 12/10/2013 - 18:16
On a quick focus frame in a

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

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Robin Leadbeater's picture
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AT2019lvs now unlikely to be associated with GW event

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

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That's a shame. Anyway, I

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

Robin Leadbeater's picture
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A recurrent object

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