TITLE:   GCN CIRCULAR
NUMBER:  24260
SUBJECT: LIGO/Virgo S190425z: ANU 2.3m early observations of ZTF19aarykkb
DATE:    19/04/27 04:34:58 GMT
FROM:    Seo-Won Chang at SkyMapper  <seowon.chang@anu.edu.au>

Seo-Won Chang (ANU/OzGrav), Christian Wolf (ANU/OzGrav), Christopher A. Onken (ANU), Susan Scott (ANU/OzGrav), Christopher Lidman (ANU), J.Cooke (Swinburne), S.Webb (Swinburne), P.Gurri (Swinburne), T.Nordlander (ANU).

We obtained a series of early IFU spectra of the potential counterpart ZTF19aarykkb (Kasliwal et al., GCN 24191) to the GW candidate S190525z (GCN 24168) and host galaxy with the WiFeS instrument on the ANU2.3m telescope, located at Siding Springs Observatory, Australia. We acquired our first 850s exposure integration starting at UT 2019-04-25T17:40:40.5 together with 5x1200s spectra, using a configuration of R3000/RT560 covering the wavelength range of 330nm to 900nm. The spectrum appears to be a young Type II supernova, consistent with Pavana (GCN 24200), Perley (GCN 24204) and Dichiara (GCN 24220).