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2025RNAAS...9....5J - Research Notes of the AAS, 9, 5 (2025/January-0)

An Updated Detection Pipeline for Precursor Emission in Type II Supernova 2020tlf.

JACOBSON-GALAN W.V., GONZALEZ S., PATEL S., DESSART L., JONES D.O., COPPEJANS D.L., DIMITRIADIS G., FOLEY R.J., KILPATRICK C.D., MATTHEWS D.J., REST S., TERRERAN G., ALEO P.D., AUCHETTL K., BLANCHARD P.K., COULTER D.A., DAVIS K.W., DE BOER T.J.L., DEMARCHI L., DROUT M.R., EARL N., GAGLIANO A., GALL C., HJORTH J., HUBER M.E., IBIK A.L., MILISAVLJEVIC D., PAN Y.-C., REST A., RIDDEN-HARPER R., ROJAS-BRAVO C., SIEBERT M.R., SMITH K.W., TAGGART K., TINYANONT S., WANG Q. and ZENATI Y.

Abstract (from CDS):

We present a new photometric pipeline for the detection of pre-supernova (pre-SN) emission in the Young Supernova Experiment (YSE) sky survey. The method described is applied to SN 2020tlf, a type II SN with precursor emission in the last ∼100 days before first light. We re-analyze the YSE griz-band light curves of SN 2020tlf and provide revised pre-explosion photometry that includes a robust list of confident detection and limiting magnitudes. Compared to the results of W. V. Jacobson-Galán et al., this new analysis yields fewer total r/i/z-band pre-SN detections at phases >-100 days. Furthermore, we discourage the use of the blackbody modeling of the pre-explosion spectral energy distribution, the pre-SN bolometric light curve and the blackbody model parameters presented in W. V. Jacobson-Galán et al. Nevertheless, binned photometry of SN 2020tlf confirms a consistent progenitor luminosity of ∼1040 erg s–1 before explosion.

Abstract Copyright: © 2025. The Author(s). Published by the American Astronomical Society.

Journal keyword(s): Supernovae - Sky surveys

Simbad objects: 1

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