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Possible optical re-brightening of SN2016gkg

ATel #9544; L. Tartaglia (TTU/UC Davis), D. Sand (TTU), S. Valenti (UC Davis)
on 25 Sep 2016; 02:58 UT
Distributed as an Instant Email Notice Supernovae
Credential Certification: Leonardo Tartaglia (ltartaglia@ucdavis.edu)

Subjects: Optical, Supernovae

Referred to by ATel #: 9556, 9562, 9573, 9576

We report the possible optical re-brightening of SN 2016gkg (reported by Victor Buso and Sebastian Botero) after its unusually fast decline (ATel #9529). The object was detected on 2016-09-24.0 UT with an apparent magnitude of 16.54 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. The source was detected again on 2016-09-25.0 UT with an apparent magnitude of 16.45 mag. All images were taken in a 'Clear' filter which was calibrated to an approximate R-band magnitude using the USNO-B1 catalog. We also include the photometry obtained so far with the PROMPT 5 0.41m telescope in the table.

JD           Mag             Instr Filter 
2457653.542 15.49 +/- 0.03 PROMPT5 Clear 
2457654.645 16.33 +/- 0.04 PROMPT5 Clear 
2457654.863 16.42 +/- 0.04 PROMPT5 Clear 
2457655.537 16.54 +/- 0.04 PROMPT5 Clear 
2457656.534 16.45 +/- 0.04 PROMPT5 Clear 
Further observations will confirm the photometric evolution of SN 2016gkg.