J/other/Sci/362.201 iPTF 14gqr (SN 2014ft) photometry (De+, 2018)
A hot and fast ultra-stripped supernova that likely formed a compact neutron
star binary.
De K., Kasliwal M.M., Ofek E.O., Moriya T.J., Burke J., Cao Y., Cenko S.B.,
Doran G.B., Duggan G.E., Fender R.P., Fransson C., Gal-Yam A., Horesh A.,
Kulkarni S.R., Laher R.R., Lunnan R., Manulis F., Masci F., Mazzali P.A.,
Nugent P.E., Perley D.A., Petrushevska R., Piro A.L., Rumsey C.,
Sollerman J., Sullivan M., Taddia F.
<Science, 362, 201-206 (2018)>
=2018Sci...362..201D 2018Sci...362..201D (SIMBAD/NED BibCode)
ADC_Keywords: Supernovae ; Photometry, UBVRI ; Photometry, ultraviolet
Abstract:
Compact neutron star binary systems are produced from binary massive
stars through stellar evolution involving up to two supernova
explosions. The final stages in the formation of these systems have
not been directly observed. We report the discovery of iPTF 14gqr (SN
2014ft), a type Ic supernova with a fast-evolving light curve
indicating an extremely low ejecta mass (~=0.2 solar masses) and low
kinetic energy (~=2x1050ergs). Early photometry and spectroscopy
reveal evidence of shock cooling of an extended helium-rich envelope,
likely ejected in an intense pre-explosion mass-loss episode of the
progenitor. Taken together, we interpret iPTF 14gqr as evidence for
ultra-stripped supernovae that form neutron stars in compact binary
systems.
Description:
PTF 14gqr (SN 2014ft) was discovered by the intermediate Palomar
Transient Factory (iPTF) on 14.18 October 2014 UTC (universal time
coordinated) at a g-band optical magnitude of ∼20.2mag. The source was
not detected in the previous observation on 13.32 October 2014 UTC
(0.86 days before discovery), with a limiting magnitude of g≥21.5mag.
The transient was found in the outskirts (at a projected offset of
∼29kpc from the center) of a tidally interacting spiral galaxy (IV Zw
155) at redshift z=0.063 and luminosity distance D=284.5 megaparsecs.
We obtained rapid ultraviolet (UV), optical, and near-infrared
follow-up observations of the source.
Objects:
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RA (2000) DE Designation(s)
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23 33 27.95 +33 38 46.1 SN 2014ft = iPTF 14gqr
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
tables1.dat 36 114 Photometric follow-up of iPTF 14gqr in the
optical and UV bands
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Byte-by-byte Description of file: tables1.dat
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Bytes Format Units Label Explanations
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1- 8 F8.2 d MJD MJD Rest frame
10- 14 F5.2 --- Phase Phase (days from explosion)
16- 19 A4 --- Filt Filter (UVW1 UVW2 B V g r i)
21 A1 --- l_mag Limit flag on mag (5σ limit)
22- 26 F5.2 mag mag Magnitude in Filter (1)
28- 31 F4.2 mag e_mag ? rms uncertainty on mag
33- 36 A4 --- Tel Telescope
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Note (1): The data have been corrected for Galactic extinctions of
0.158mag (i-band), 0.212mag (r-band), 0.307mag( g-band), 0.337mag (B-band),
0.553mag (UVW1 band) and 0.748mag (UVW2 band).
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 12-Feb-2019