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The discovery of DLT17cq/AT 2017gmr with PROMPT

ATel #10706; S. Valenti (UC Davis), L. Tartaglia (UA, UC Davis), D. Sand, S. Wyatt (UA), K. A. Bostroem (UC Davis), D. E. Reichart, J. B. Haislip, V. Kouprianov (UNC)
on 4 Sep 2017; 15:44 UT
Distributed as an Instant Email Notice Supernovae
Credential Certification: Leonardo Tartaglia (ltartaglia@ucdavis.edu)

Subjects: Optical, Supernovae, Transient

Referred to by ATel #: 10717, 11083

We report the discovery of DLT17cq/AT 2017gmr. The object was discovered on 2017-09-04.20 UT at r~15.12 mag, during the ongoing D<40 Mpc (DLT40) one day cadence supernova search, using data from the PROMPT 5 0.41m telescope located at CTIO. A confirmation image was obtained with the same instrument on 2017-09-04.25 UT, where the transient was detected at r~15.02 mag. DLT17cq/AT 2017gmr is located at RA: 02:35:30.15 Dec: -09:21:15.0 (36.3E, 7.0N offset from the center of the host galaxy, NGC 0988). We do not detect the transient (r>19.4 mag) on 2017-09-02.23 UT or in prior imaging of the field. All images were taken in a 'Clear' filter which was calibrated to an approximate r-band magnitude using the USNO-B1 catalog. Further observations are encouraged.