Asiago spectroscopic classification of ASAS-SN18ao

ATel #11181; L. Tomasella, S. Benetti, E. Cappellaro, M. Turatto (INAF OAPd)
on 17 Jan 2018; 08:03 UT
Distributed as an Instant Email Notice Supernovae
Credential Certification: Stefano Benetti (stefano.benetti@oapd.inaf.it)

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The Asiago Transient Classification Program (Tomasella et al. 2014, AN, 335, 841) reports the spectroscopic classification of ASAS-SN18ao (aka AT2018gm, Atel #11178) discovered during the ongoing All Sky Automated Survey for SuperNovae (ASAS-SN, Shappee et al. 2014).

The observations were performed with the Asiago 1.82 m Copernico Telescope equipped with AFOSC (range 340-820 nm; resolution 1.4 nm).

 
 
Survey Name   | IAI Name      | Discovery date (UT)  | Discovery mag    | Observation (UT)    |  Type  | z         | Notes| 
ASAS-SN18ao   | SN2018gm      |  2018-01-14 07:40:48 | 18               |2018–01-16 23:18:00  |   Ia   | 0.058     | (1)  | 
 
 

(1) According to the classification reported in Atel #11180, the best match of ASAS-SN18ao is with Type Ia SNe around maximum light. Assuming a redshift of 0.058, derived from SNID and GELATO spectral fitting and in agreement with the photoZ (0.063) of the host galaxy from SDSS14, an expansion velocity of about 10900 km/s is derived from the Si II 635.5 nm absorption.