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Spectroscopic Classifications of Optical Transients with Mayall/KOSMOS

ATel #8506; Y.-C. Pan, S. Downing, R. J. Foley (Illinois), S. W. Jha (Rutgers), A. Rest (STScI), D. Scolnic (Chicago/KICP)
on 4 Jan 2016; 18:14 UT
Credential Certification: Yen-Chen Pan (ycpan@illinois.edu)

Subjects: Optical, Supernovae, Transient

Referred to by ATel #: 8526

We report the following classifications of optical transients from spectroscopic observations with the KOSMOS on the Mayall telescope. Targets were supplied by the All-Sky Automated Survey for Supernovae (ASAS-SN), Catalina Real-Time Transient Survey (CRTS) and the CBAT Transient Object Followup Reports. All observations were made on 2016 Jan 03 UT. Classifications were performed with SNID (Blondin & Tonry, 2007, ApJ, 666, 1024).

 
Name | RA (J2000) | Dec (J2000) | z | Type | Phase | Notes
ASASSN-15uw | 02:35:34.31 | -06:03:46.97 | 0.031 | Ia | -9d | (1) PSN J01534240+2956107 | 01:53:42.40 | +29:56:10.7 | 0.026 | Ia | -2d | (2) PSN J02344555+1820390 | 02:34:45.55 | +18:20:39.0 | 0.034 | II | | ASASSN-15un | 02:40:41.38 | +16:49:51.82 | 0.029 | ? | | (3) CSS151230:044008+123051 | 04:40:07.75 | +12:30:51.3 | 0.026 | Ia | +4d | (4) ASASSN-16aa | 08:09:14.550 | +00:16:50.61 | 0.017 | Ia | -3d | (5)

Notes: When the redshift is given to 2 decimal places, it is derived from the SN spectrum. Otherwise, the redshift is determined from the host galaxy. (1) We measure a Si II 6355 velocity of -12,600 km/s. (2) We measure a Si II 6355 velocity of -10,900 km/s. (3) Featureless continuum. (4) We measure a Si II 6355 velocity of -10,400 km/s. (5) We measure a Si II 6355 velocity of -10,100 km/s.