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Kuntal Misra & Andrew Steven Fruchte

Radioactive decay of the late-time light curves of GRB-SNe

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Mots-clés : astronomie, astrophysique, extragalactique, GRB, photométrie, supernovae


We present the late-time Hubble Space Telescope observations of two GRB associated supernovae, GRB 030329/SN 2003dh and XRF 060218/SN 2006aj. Using the multi-color data upto 320 days after the burst, we constrain the late-time decay nature of these supernovae. The decay rates of SN 2003dh are steeper than SN 2006aj. A comparison with two other GRB supernovae, GRB 980425/SN 1998bw and the supernova associated with XRF 020903, shows that the decay rates of SN 2003dh are similar to XRF 020903 and those of SN 2006aj are similar to SN 1998bw. The late-time decay rates are steeper than the 56Co56Fe radioactive decay rate (0.0098 mag day-1) indicating that there is some leakage of gamma-rays.

Keywords : astronomy, astrophysics, extragalactic, GRB, photometry, supernovae

Pour citer cet article

Kuntal Misra & Andrew Steven Fruchte, «Radioactive decay of the late-time light curves of GRB-SNe», Bulletin de la Société Royale des Sciences de Liège [En ligne], Volume 87 - Année 2018, Actes de colloques, First Belgo-Indian Network for Astronomy & Astrophysics (BINA) workshop - November 2016 - Nainital, India, 347 - 350 URL :

A propos de : Kuntal Misra

Aryabhatta Research Institute of observational sciencES, Manora Peak, Nainital 263 002 India,

A propos de : Andrew Steven Fruchte

Space Telescope Science Institute, 3700 San Martin Drive, Baltimore MD 21218 USA