Discovery and Classification of Transients from CRTS-II
ATel #9319; A. J. Drake, S. G. Djorgovski, A. A. Mahabal, M. J. Graham (Caltech); D. Stern (JPL), M. Catelan (PUC Chile); E. Christensen, S. M. Larson (LPL/UA)
on 4 Aug 2016; 18:32 UT
Credential Certification: Andrew J. Drake (ajd@cacr.caltech.edu)
Subjects: Optical, Quasar, Supernovae, Transient
Following on from the Catalina Real-time Transient Survey (CRTS), the CRTS-II
project has begun to search for transients and highly variable sources.
As with CRTS, all detections will be made public immediately following discovery.
Initial CRTS-II observations began on May 26th following the upgrade of the Catalina
Sky Survey's 1.5m Mt. Lemmon telescope to a ~5 sq. deg field-of-view. A full list
of current CRTS-II detections is given
here.
Spectroscopic follow-up observations of CRTS-II SN candidates and unclassified sources
was undertaken on July 3rd UT using the Palomar 5m with DBSP. Supernova spectra were
classified using the SuperNova IDentification code (SNID; Blondin & Tonry 2007, ApJ, 666, 1024).
| ID | Disc. Mag | Type | Best Match | redshift | notes |
|---|
| MLS160617:211830+095501 | 20.0 | SN | Ia-91T | 2001eh | +3 | 0.13 | (1) |
| MLS160616:175555+434723 | 19.1 | SN | Ia | 2005cf | +5 | 0.069 |
| MLS160616:160420+392813 | 18.0 | SN | SLSN-I | LSQ14bdq | | 0.18 | (2) |
| MLS160613:160158+154203 | 18.3 | SN | Ia | 2006N | +28 | 0.037 | (3) |
| CSS160615:174311+170014 | 18.6 | SN | Ia-91T | 1999aa | +14 | 0.083 | (4) |
| CSS160607:162521+574415 | 18.4 | SN | Ia | 2005cf | +37 | 0.063 | (4) |
| MLS160702:153017+104945 | 20.4 | AGN | | | | 1.20 |
| MLS160614:220201+043654 | 20.1 | AGN | | | | 1.06 |
| MLS160613:165527+430121 | 20.4 | AGN | | | | 1.53 |
| MLS160607:231133+164715 | 20.4 | AGN | | | | 1.22 | (5) |
Notes:
(1) This source matches AT2016cxr (=PS16cvv) and was first identified by PS1 on June 20th.
(2) Type-I SLSN before maximum. Peak magnitude Mv=-22.2.
(3) Classification is based on a noisy spectrum.
(4) Transient was discovered in CSS telescope data.
(5) Matches Chandra X-ray source CXO J231132.7+164714. Noisy spectrum.
Further details of the discovery and classification of superluminous SN MLS160616:160420+392813
are available by following this link.
All CRTS-II and CRTS discoveries are publicly available via the CRTS homepage.
