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Discovery of DLT18h/AT 2018xx with PROMPT and the DLT40 Survey

ATel #11328; D. Sand (Arizona), S. Valenti (UC Davis), S. Wyatt (Arizona), K. A. Bostroem (UC Davis), D. E. Reichart, J. B. Haislip, V. Kouprianov (UNC)
on 21 Feb 2018; 16:07 UT
Distributed as an Instant Email Notice Supernovae
Credential Certification: David Sand (dave.j.sand@gmail.com)

Subjects: Optical, Supernovae

Referred to by ATel #: 11330

We report the discovery of DLT18h/AT 2018xx, which was first imaged on 2018 Feb 21.1 (UT) at R~17.2 mag during the ongoing D<40 Mpc (DLT40) one day cadence supernova search, which uses data from the PROMPT5 0.41m telescope located at CTIO. A confirmation image was obtained on 2018 Feb 21.2 with the same PROMPT5 telescope. DLT18h is located at RA: 12:53:48.238 DEC: -39:41:48.16 (54.4 arcsec West and 62.9 arcsec North from the host galaxy NGC 4767). We do not detect the transient on 2018 Feb 10 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.