Photometric Observations of Supernova 2013cq Associated with GRB 130427A

R. L. Becerra , A. M. Watson , W. H. Lee , N. Fraija , N. R. Butler , J. S. Bloom , J. I. Capone , A. Cucchiara

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J. A. de Diego O. D. Fox N. Gehrels L. N. Georgiev J. J. Gonz\'alez A. S. Kutyrev O. M. Littlejohns J. X. Prochaska E. Ramirez-Ruiz M. G. Richer C. G. Rom\'an-Z\'u\~niga V. L. Toy E. Troja

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classification 🌌 astro-ph.HE

keywords supernovaafterglowassociatedphotometricabsoluteartirastronbehavior

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We observed the afterglow of GRB 130427A with the RATIR instrument on the 1.5-m Harold L. Johnson telescope of the Observatorio Astron\'omico Nacional on Sierra San Pedro M\'artir. Our homogenous $griZYJH$ photometry extends from the night of burst to three years later. We fit a model for the afterglow. There is a significant positive residual which matches the behavior of SN 1998bw in the $griZ$ filters; we suggest that this is a photometric signature of the supernova SN 2013cq associated with the GRB. The peak absolute magnitude of the supernova is $M_r=-18.43\pm0.11$.

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Photometric Observations of Supernova 2013cq Associated with GRB 130427A

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