Outburst of the X-ray transient in NGC 6440 and identification of the optical and quiescent X-ray counterparts

Details Outburst of the X-ray transient in NGC 6440 and identification of the optical and quiescent X-ray counterparts Outburst of the X-ray transient in NGC 6440 and identification of the optical and quiescent X-ray counterparts

Aug 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001atel...74....1i&link_type=abstract

The Astronomer's Telegram, #74

Astronomy and Astrophysics

Astronomy

1

Optical, X-Ray, Binaries, Globular Clusters, Neutron Stars, Transients

Scientific paper

We have obtained observations with ESO NTT SUSI2 in B and R and with Chandra ACIS-S of the transient in NGC6440, which is in outburst again since before 2001 Aug 14, as discovered with RXTE ASM (http://xte.mit.edu/asmlc/ASM.html). The Chandra position of the transient coincides with the brightest source (of some 20 detected sources) in our 2000 July 4 Chandra observation, obtained when the transient was not active, and with the optical variable V2 which was active during 1998 August outburst of the transient.

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