TITLE: GCN CIRCULAR NUMBER: 18418 SUBJECT: LIGO/VIRGO G184098 : PESSTO classifications of PanSTARRS transients in the northern region DATE: 15/10/13 12:03:31 GMT FROM: S. J. Smartt at Queens U Belfast 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.