Difference: GCNCIRCULAR21787 ( vs. 1)

Revision 12017-09-02 - ThomasKupfer

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META TOPICPARENT name="LVCGCNs"
TITLE: GCN CIRCULAR
NUMBER: 21787
SUBJECT: LIGO/Virgo G298048: Chandra monitoring of the X-ray emission from SSS17a
DATE: 17/09/02 17:06:21 GMT
FROM: Elenora Troja at GSFC/Swift <nora.gsfc@gmail.com>

E. Troja (UMD/GSFC), L. Piro (INAF/IAPS), T. Sakamoto (AGU), S. B. Cenko (NASA/GSFC), and A. Lien (UMBC/GSFC) report on behalf of a larger collaboration:

We re-observed the field of SSS17a (Coulter et al., LVC GCN 21529) with the Chandra X-ray Observatory (PI: E. Troja) on 2017-09-01 (~15 days after the LVC trigger) for a total exposure of 47 ks.

The X-ray source reported in Troja et al. (LVC GCN 21765) is still detected. At the position of the optical/IR transient we measure ~17 net counts. By describing the spectrum with an absorbed power-law we estimate a flux of approximately 4.5E-15 erg/cm2/s (0.5-8.0 keV).

We thank Belinda Wilkes and the entire Chandra team for approving and scheduling these observations.

-- ThomasKupfer - 02 Sep 2017

 
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