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Recent Blazar Flares Discovered by CRTS

ATEL # 2800; S.G. Djorgovski, A.J. Drake, A.A. Mahabal, M.J. Graham, R. Williams (Caltech); J. Prieto (OCIW); M. Catelan (PUC); E. Christensen (Gemini Observatory); E.C. Beshore, S.M. Larson (LPL/UA); R.H. McNaught (ANU)
on 17 Aug 2010; 22:19 UT
Distributed as an Instant Email Notice (Request for Observations)
Password Certification: S. George Djorgovski (

Subjects: Optical, Request for Observations, Transients

We report the discovery of flaring radio sources and blazars by the Catalina Real-time Transient Survey (CRTS) during the period from 2010-05-31 to 2010-07-04 UT. Some of them exhibit high-amplitude optical flares. All of them were announced in real-time on the CRTS website (see the links below). The transient event designations give the UT discovery date (yymmdd), and the J2000 coordinates (hhmmss+_ddmmss), and are listed here in the reverse temporal order:

IDDisc.MagName, redshift
CSS100704:225515+241011 15.9 MG3 J225517+2409
SSS100703:134740-375036 17.3 PMN J1347-3750
SSS100618:135147-291217 17.6 PKS 1348-289, z=1.034
CSS100616:131808-173536 17.65 NVSS J131808-173537
SSS100615:210353-354620 17.5 NVSS J210353-354620
CSS100611:002232+060805 17.35 PKS 0019+058
CSS100604:203901-104642 15.9 CRATES J203901-104652
CSS100602:172807+121540 17.9 PKS 1725+123, z=0.588
CSS100601:141922-083830 16.85 NVSS J141922-083830
CSS100531:101955+182648 18.9 NVSS J101954+182649

Follow-up at any wavelengths, radio and gamma in particular, would be useful.

All CRTS discoveries are available from and More information, light curves, exact coordinates, and finding charts are linked there.

CRTS Website

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R. E. Rutledge , Editor
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