Spectroscopic follow-up of flaring blazars from CRTS

ATel #1952; A. A. Mahabal, S. G. Djorgovski, A. J. Drake, M. Graham, R. Williams, W. Max-Moerbeck, J. Richards (Caltech), A. Myers (UIUC), G. Pooley (Cavendish Lab, Cambridge), V. Mohan, A. N. Ramaprakash, A. Kembhavi, G. Devangan (IUCAA), E. Beshore, S. M. Larson, A. Boattini (UA/LPL), E. Christiansen (Gemin Obs.)
on 6 Mar 2009; 07:55 UT
Credential Certification: Ashish Mahabal (aam@astro.caltech.edu)

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We report spectroscopic observations using the Double Beam Spectrograph at the Palomar 200-inch telescope of three transients from Catalina Sky Survey. The observations were carried out on 25 Feb 2009 UT.

ID	Detection Date	RA	Dec	VOEvent ID	Redshift
CSS090102:112403+233646	2009-01-02 UT 11:08:48	11:24:02.69	23:36:46.2	901021230574116817	2.14
CSS090214: 101052-020020	2009-02-14 UT 10:02:09	10:10:51.71	-02:00:19.9	902140010554111683	0.89
CSS090120:085010-121335	2009-01-20 UT 08:16:38	08:50:09.63	-12:13:35.3	901200120474150650	0.57

As reported in ATEL #1890, CSS090102:112403+233646 is a known radio source. We will separately report the radio monitoring of it. The redshift was determined using Ly-alpha and C IV lines.

CSS090120:085010-121335 is known to have gone through phases of optical flaring before (1997IAUC.6639B...1H)

We also have additional radio epochs for CSS090214:101052-020020. Those data will be updated at the links given below.

The discovery data, CSS lightcurve and finding charts for these sources are posted at the following VOEventNet webpages:
http://voeventnet.caltech.edu/feeds/ATEL/CRTS/901021230574116817.atel.html
http://voeventnet.caltech.edu/feeds/ATEL/CSS/902140010554111683.atel.html
http://voeventnet.caltech.edu/feeds/ATEL/CSS/901200120474150650.atel.html