# An optimized radio follow-up strategy for stripped-envelope core-collapse supernovae

## TL;DR

This paper proposes an optimized radio follow-up strategy for detecting and identifying stripped-envelope core-collapse supernovae, enhancing efficiency and accuracy in large survey programs.

## Contribution

It introduces a method to optimize timing of radio observations for supernovae, improving detection efficiency with minimal telescope time.

## Key findings

- Optimal radio observation timing derived for supernova detection.
- Unpublished upper-limit on late-time radio emission from supernova iPTF17cw.
- Discussion on implications for X-ray follow-up strategies.

## Abstract

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 We also present a previously unpublished upper-limit on the late-time radio emission from supernova iPTF17cw.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.