Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The GALEX-PTF experiment: II. supernova progenitor radius and energetics
  via shock-cooling modeling   The radius and surface composition of an exploding massive star, as well as
the explosion energy per unit mass, can be measured using early ultraviolet
(UV) observations of core-collapse supernovae (CC SNe). We present the results
from a simultaneous \GALEX and Palomar Transient Factory (PTF) search for early
UV emission from SNe. We analyze five CC SNe for which we obtained $NUV$
measurements before the first ground-based $R$-band detection. We introduce
SOPRANOS, a new maximum likelihood fitting tool for models with variable
temporal validity windows, and use it to fit the \citet{SapirWaxman2017} shock
cooling model to the data. We report four Type II SNe with progenitor radii in
the range of $R_*\approx600-1100R_\odot$ and a shock velocity parameter in the
range of $v_{s*}\approx 2700-6000 \,\rm km\,s^{-1}$
($E/M\approx2-8\times10^{50}\,\rm erg/M_\odot$) and one type IIb SN with
$R_*\approx210R_\odot$ and $v_{s*}\approx11000 \rm\, km\,s^{-1}$
($E/M\approx1.8\times10^{51}\,\rm erg/M_\odot$). Our pilot GALEX/PTF project
thus suggests that a dedicated, systematic SN survey in the $NUV$ band, such as
the wide-field UV explorer \textit{ULTRASAT} mission, is a compelling method to
study the properties of SN progenitors and SN energetics.

15
The categories of this paper are: nucl-ex
19
The categories of this paper are: eess
0
The categories of this paper are: hep-ph
24
The categories of this paper are: dg-ga
2
The categories of this paper are: math
5
The categories of this paper are: gr-qc
31
The categories of this paper are: ao-sci
11
The categories of this paper are: hep-lat
10
The categories of this paper are: q-bio
37
The categories of this paper are: supr-con
22
The categories of this paper are: chao-dyn
4
The categories of this paper are: cond-mat
13
The categories of this paper are: quant-ph
25
The categories of this paper are: patt-sol
34
The categories of this paper are: chem-ph
27
The categories of this paper are: comp-gas