Keck Spectroscopy of Transients from the CRTS Survey

We obtained long-slit spectra of several transients discovered by CRTS, using the LRIS instrument on the Keck-I telescope, on the nights of UT 2010 May 17 and 18, in good conditions. CSS090826:223958+231837 reached a peak mag ~ 18 in an outburst in late October 2009, but has been undetected down to ~ 21 mag in most of the available CRTS data, and has a SDSS counterpart at ~ 22 mag. Our spectrum shows a blue continuum with narrow Balmer lines in emission at a ~ zero redshift.