GCN Circular 18418
Subject
LIGO/VIRGO G184098 : PESSTO classifications of PanSTARRS transients in the northern region
Date
2015-10-13T12:03:31Z (9 years ago)
From
S. J. Smartt at Queens U Belfast <s.smartt@qub.ac.uk>
M. Fraser (Cambridge), J. Lyman (Warwick), H. Campbell (Cambridge), T.-W. Chen (Bonn), A. De Cia (ESO), I. Manulis (Weizmann), C. Inserra (QUB), K. Maguire (QUB), E. Cappellaro (INAF), S. J. Smartt (QUB), K. W. Smith (QUB), M. Sullivan (Southampton), S. Valenti (LCOGT), O. Yaron (Weizmann), D. Young, D. Wright (QUB), K. Chambers, M. Huber, E. Magnier, H. Flewelling, C. Waters, J. Tonry, A. Schultz, N. Primak (IfA, University of Hawaii), C. Stubbs (Harvard)
Following the Pan-STARSS discovery (Smartt et al, GCN 18394) of candidates
in the G184098 northern error region, PESSTO, the Public ESO Spectroscopic
Survey for Transient Objects (see Smartt et al. 2015, A&A, 579,
40 http://www.pessto.org), reports two further classifications.
PS15cej is a type Ia supernova around maximum light (spectrum taken on
2015-10-02) at z=0.049.
PS15cel is a type II supernova, probably 2-3 weeks after maximum
light (spectrum taken on 2015-10-12) at z=0.05
All observations were performed on the ESO New Technology Telescope at
La Silla using EFOSC2 and Grism 13 (3985-9315A, 18A resolution).
Classifications were done with SNID (Blondin &
Tonry, 2007, ApJ, 666, 1024). Classification spectra can be obtained
from http://www.pessto.org (via WISeREP).
Eight optical transients have been detected to date (see GCN 18394, 18395).
The sky positions and G184098 localisation region is now visualised
on a plot on the GraceDB event webpage. Six have spectral
classifications, while the other two are most likely
now fainter than i ~ 21 mag.
We thank Leo Singer and Roy Henderson for assistance in clarifying the
contours, healpix interpretation and upload mechanisms.