J/ApJ/931/71 The GALEX-PTF experiment. II. Core-collapse SNe (Ganot+, 2022)
The GALEX-PTF experiment.
II. Supernova progenitor radius and energetics via shock-cooling modeling.
Ganot N., Ofek E.O., Gal-Yam A., Schulze S., Soumagnac M.T., Morag J.,
Waxman E., Kulkarni S.R., Kasliwal M.M., Neill J.
<Astrophys. J., 931, 71 (2022)>
=2022ApJ...931...71G 2022ApJ...931...71G
ADC_Keywords: Supernovae; Photometry, ultraviolet; Optical; Redshifts
Keywords: Supernovae ; Core-collapse supernovae ; High energy astrophysics
Abstract:
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 Galaxy Evolution
Explorer (GALEX) and Palomar Transient Factory (PTF) search for early
UV emission from SNe. We analyze five CC SNe for which we obtained
near-UV (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 Sapir & Waxman (2017ApJ...838..130S 2017ApJ...838..130S) shock-cooling model to
the data. We report four Type II SNe with progenitor radii in the
range of R*∼600-1100R☉ and a shock velocity parameter in the
range of vs*∼2700-6000km/s (E/M∼2-8x1050erg/M☉) and one
Type IIb SN with R*∼210R☉ and vs*∼11000km/s
(E/M∼1.8x1051erg/M☉). Our pilot GALEX/PTF project thus
suggests that a dedicated, systematic SN survey in the NUV band, such
as the wide-field UV explorer ULTRASAT mission, is a compelling method
to study the properties of SN progenitors and SN energetics.
Description:
Between 2012 May 24 and 2012 July 28 we monitored about 600deg2 of
high galactic latitude sky using the GALEX satellite and the Palomar
Transient Factory (PTF). The observations were conducted with the
GALEX NUV filter and the PTF Mould R band. This GALEX-PTF experiment
is further described in Ganot+ (2016ApJ...820...57G 2016ApJ...820...57G).
The PTF, using the 48 inch Oschin Schmidt Telescope at the Palomar
Observatory equipped with a CCD mosaic, with a field of view of
7.26deg2, was scanning a similar sky patch as GALEX in its Mould R
band, reaching an R-band limiting magnitude of about 21mag AB with a
cadence of 2days. See Section 2.2.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 90 10 Core-collapse supernovae (CC SNe) detected by PTF
during the GALEX/PTF experiment
table2.dat 43 237 GALEX NUV data
table3.dat 87 1028 Palomar Transient Factory (PTF) R data
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See also:
J/MNRAS/395/1409 : Type II-P SN progenitor constraints (Smartt+, 2009)
J/ApJ/742/L18 : Follow-up photometry of the SN IIb PTF 11eon (Arcavi+, 2011)
J/ApJ/736/159 : Photometry monitoring of the SN PTF10vdl (Gal-Yam+, 2011)
J/MNRAS/438/L101 : First month on SN 2013ej (Valenti+, 2014)
J/MNRAS/446/3895 : The rising light curves of Type Ia supernovae (Firth+, 2015)
J/A+A/574/A60 : Light curve templates of SNe Ib/c from SDSS (Taddia+, 2015)
J/ApJ/820/33 : R-band light curves of type II supernovae (Rubin+, 2016)
J/MNRAS/478/3138 : Luminous supergiants in Magellanic Clouds (Davies+, 2018)
J/ApJ/861/63 : Type IIP SN 2016bkv LCs and spectra (Hosseinzadeh+, 2018)
J/ApJ/902/6 : UV to visible-light obs. of SN 2018fif (Soumagnac+, 2020)
J/ApJS/255/29 : PTF core-collapse SN host-galaxy sample. I. (Schulze+, 2021)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 8 A8 --- SN PTF name of the supernova
10- 11 I2 h RAh Hour of right ascension (J2000)
13- 14 I2 min RAm Minute of right ascension (J2000)
16- 20 F5.2 s RAs Second of right ascension (J2000)
22 A1 --- DE- Sign of declination (J2000)
23- 24 I2 deg DEd Degree of declination (J2000)
26- 27 I2 arcmin DEm Arcminute of declination (J2000)
29- 32 F4.1 arcsec DEs Arcsecond of declination (J2000)
34- 39 F6.4 --- z [0.029/0.14] Redshift
41- 47 A7 --- Type SN type
49 A1 --- f_Type Flag on Type (1)
51- 61 A11 "Y/M/D" DatePTF PTF discovery date
63- 73 A11 "Y/M/D" DateG GALEX discovery date
75- 79 F5.3 mag E(B-V) [0.02/0.14] Galactic extinction according to
the Schlegel+ (1998ApJ...500..525S 1998ApJ...500..525S) maps
81- 88 E8.3 cW/m2/nm BckgNUV [6.09e-18/1.2e-15] NUV background
in erg/s/cm2/Å
90 A1 --- f_BckgNUV Flag on BckgNUV (1)
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Note (1): Flag as follows:
b = A bright SNII with a light-curve intermediate between SNe II-P and II-L.
c = A bright SNII with a very long rise time, similar to
SN 1998A (Pastorello+ 2005MNRAS.360..950P 2005MNRAS.360..950P),
SN 2000cb (Kleiser+ 2011MNRAS.415..372K 2011MNRAS.415..372K), and
SNe 2005ci & 2005dp (Arcavi+ 2012ApJ...756L..30A 2012ApJ...756L..30A).
See also Taddia+ (2015, J/A+A/574/A60).
d = The PTF12gcx background was calculated using only GALEX data measurements
prior to the SN detection by PTF, since an NUV transient could not be
temporally localized.
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Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 8 A8 --- SN Supernova identifier
10- 18 F9.3 d MJD [56072/56135.71] Modified Julian Date of
observation (JD-2400000.5)
20- 25 F6.3 ct/s cts [-0.3/9]? Counts per second
27- 31 F5.3 ct/s e_cts [0.05/0.509]? Uncertainty (1σ)
33- 37 F5.2 mag mag [17.71/25.83]? AB magnitude (G1)
39- 43 F5.2 mag limmag [20.32/22.15]? Limiting AB magnitude (3σ)
for negative cts values
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Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1- 8 A8 --- SN Supernova identifier
10- 19 F10.4 d MJD [56008.4/56845.3] Modified Julian Date of
observation (JD-2400000.5)
21- 27 F7.1 ct cts [-1902/4034] Counts
29- 34 F6.1 ct e_cts [39/1477] Uncertainty in counts
36- 39 F4.1 mag zp [27.0] Zeropoint
41- 44 F4.1 mag e_zp ? Uncertainty in zp
46- 47 A2 --- magsys Calibration system (always "AB")
49- 51 A3 --- Tel Telescope (always "p48")
53- 58 A6 --- Det Detector ("CFH12k" or "camera")
60- 75 A16 --- Src Photometry Source (always "SullivanPipeline")
77- 81 F5.2 mag mag [17.99/26.36]? AB magnitude (G1)
83- 87 F5.2 mag limmag [17.9/24.1]? Limiting AB magnitude (3σ)
for negative cts values
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Global notes:
Note (G1): Negative count values cannot be converted to magnitudes.
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History:
From electronic version of the journal
(End) Prepared by [AAS], Emmanuelle Perret [CDS] 21-Mar-2024