An optimized radio follow-up strategy for stripped-envelope core-collapse supernovae. (arXiv:1908.06190v1 [astro-ph.HE])
<a href="http://arxiv.org/find/astro-ph/1/au:+Carbone_D/0/1/0/all/0/1">Dario Carbone</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Corsi_A/0/1/0/all/0/1">Alessandra Corsi</a>
Several on-going or planned synoptic optical surveys are offering or will
soon be offering an unprecedented opportunity for discovering larger samples of
the rarest types of stripped-envelope core-collapse supernovae (SNe), such as
those associated with relativistic jets, mildly-relativistic ejecta, or strong
interaction with the circumstellar medium (CSM). Observations at radio
wavelengths are a useful tool to probe the fastest moving ejecta, as well as
denser circumstellar environments, and can thus help us identify the rarest
type of core-collapse explosions. Here, we discuss how to set up an efficient
radio follow-up program to detect and correctly identify radio-emitting
stripped-envelope core-collapse explosions. We use a method similar to the one
described in citealt{Carbone2018}, and determine the optimal timing of GHz
radio observations assuming a sensitivity comparable to that of the Karl G.
Jansky Very Large Array. The optimization is done so as to ensure that the
collected radio observations can identify the type of explosion powering the
radio counterpart by using the smallest possible amount of telescope time. We
also present a previously unpublished upper-limit on the late-time radio
emission from supernova iPTF17cw. Finally, we conclude by discussing
implications for follow-up in the X-rays.
Several on-going or planned synoptic optical surveys are offering or will
soon be offering an unprecedented opportunity for discovering larger samples of
the rarest types of stripped-envelope core-collapse supernovae (SNe), such as
those associated with relativistic jets, mildly-relativistic ejecta, or strong
interaction with the circumstellar medium (CSM). Observations at radio
wavelengths are a useful tool to probe the fastest moving ejecta, as well as
denser circumstellar environments, and can thus help us identify the rarest
type of core-collapse explosions. Here, we discuss how to set up an efficient
radio follow-up program to detect and correctly identify radio-emitting
stripped-envelope core-collapse explosions. We use a method similar to the one
described in citealt{Carbone2018}, and determine the optimal timing of GHz
radio observations assuming a sensitivity comparable to that of the Karl G.
Jansky Very Large Array. The optimization is done so as to ensure that the
collected radio observations can identify the type of explosion powering the
radio counterpart by using the smallest possible amount of telescope time. We
also present a previously unpublished upper-limit on the late-time radio
emission from supernova iPTF17cw. Finally, we conclude by discussing
implications for follow-up in the X-rays.
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