WHT optical spectroscopy of Swift J1922.7-1716

Details WHT optical spectroscopy of Swift J1922.7-1716 WHT optical spectroscopy of Swift J1922.7-1716

Nov 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011atel.3740....1w&link_type=abstract

The Astronomer's Telegram, #3740

Astronomy and Astrophysics

Astronomy

Optical, Binary, Transient

Scientific paper

We observed the optical counterpart of Swift J1922.7-1716, motivated by the recent trigger of Swift BAT by this source (GCN circular 12522, Barthelmy et al. 2011), using the ISIS spectrograph on the 4.2m William Herschel Telescope (La Palma, Spain). We obtained 4 x 300 seconds exposures, starting at 19:55 UT on November 4th 2011. We used R300B and R158R grisms, in the blue and red arm of ISIS.
The source spectrum shows broad emission lines of hydrogen (Balmer lines) and He II, all at redshift 0.

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