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Optical photometry of PSN J14021678+5426205 in M101

ATel #7079; J. Vinko (University of Szeged), K. Sarneczky (Konkoly Observatory), A. Szing (Baja Observatory)
on 15 Feb 2015; 19:44 UT
Credential Certification: Jozsef Vinko (vinko@astro.as.utexas.edu)

Subjects: Optical, Supernovae, Transient

Referred to by ATel #: 7082, 7206, 8599, 8848, 8891

We observed the transient PSN J14021678+5426205 in M101 (ATel #7072, #7070, #7069, #7063) on 2015-02-15.0 UTC with the 0.6m Schmidt telescope through Johnson-Cousins BVRI filters at Konkoly Observatory, Piszkesteto, Hungary, and with the 0.5m BART telescope through Sloan griz filters at Baja Observatory, Hungary. Based on local tertiary standard stars (Vinko et al. A&A 546, 12, 2012) and SDSS DR7 catalog data, the following magnitudes have been obtained for the transient:

B = 19.19 +/- 0.04; V = 17.57 +/- 0.03; R = 16.92 +/- 0.04; I = 16.26 +/- 0.03;
g = 17.81 +-/ 0.17; r = 16.97 +/-0.17; i = 16.58 +/- 0.13; z = 16.29 +/- 0.16;

Our B and V measurements are consistent with the recent Swift b and v magnitudes (ATel #7072). The R, I, r, i and z magnitudes suggest significant (~2 mag) brightening since 2015-01-19 (ATel #7069), in accord with recent iPTF measurements (ATel #7072).