J/ApJ/788/L21 Measured photometry of SN 2014J from HST (Amanullah+, 2014)
The peculiar extinction law of SN 2014J measured with the Hubble Space
Telescope.
Amanullah R., Goobar A., Johansson J., Banerjee D.P.K., Venkataraman V.,
Joshi V., Ashok N.M., Cao Y., Kasliwal M.M., Kulkarni S.R., Nugent P.E.,
Petrushevska T., Stanishev V.
<Astrophys. J., 788, L21 (2014)>
=2014ApJ...788L..21A 2014ApJ...788L..21A (SIMBAD/NED BibCode)
ADC_Keywords: Supernovae ; Photometry, HST ; Photometry, UBVRI ;
Photometry, infrared ; Extinction
Keywords: dust, extinction - galaxies: individual: Messier 82 -
supernovae: individual: SN 2014J
Abstract:
The wavelength dependence of the extinction of Type Ia SN 2014J in the
nearby galaxy M82 has been measured using UV to near-IR photometry
obtained with the Hubble Space Telescope, the Nordic Optical
Telescope, and the Mount Abu Infrared Telescope. This is the first
time that the reddening of an SN Ia is characterized over the full
wavelength range of 0.2-2 µm. A total-to-selective extinction,
RV≥ 3.1, is ruled out with high significance. The best fit at
maximum using a Galactic type extinction law yields RV=1.4±0.1.
The observed reddening of SN 2014J is also compatible with a power-law
extinction, Aλ/AV=(λ/λV)p as expected
from multiple scattering of light, with p=-2.1±0.1. After correcting
for differences in reddening, SN 2014J appears to be very similar to
SN 2011fe over the 14 broadband filter light curves used in our study.
Description:
We obtained observations (Program DD-13621; PI: Goobar) of SN 2014J
with HST in the four UV broadband filters F218W, F225W, F275W, and
F336W for seven epochs using a total of seven HST orbits during Cycle 21.
In addition to this we also obtained optical broad-, medium-, and
narrowband photometry in filters F467M, F631N, and F845M for visits
(1, 3) and optical broadband photometry using F438W, F555W, and F814W
for the remaining five visits. All observations were obtained with the
Wide-Field Camera-3 (WFC3) using the UVIS aperture UVIS2-C512C-SUB.
Objects:
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RA (ICRS) DE Designation(s)
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09 55 42.12 +69 40 25.9 SN 2014J = PSN J09554214+6940260
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 58 162 The measured photometry of SN 2014J from
HST/WFC3, NOT/ALFOSC and the Mount Abu infrared
telescope
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See also:
I/254 : The HST Guide Star Catalog, Version 1.2 (Lasker+ 1996)
J/ApJ/753/22 : Swift/UVOT observations of SN 2011fe (Brown+, 2012)
J/ApJ/805/74 : SN2014J Swift/UVOT light curves (Brown+, 2015)
J/A+A/585/A19 : SN 2014J BV light curves (Bonanos+, 2016)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 7 F7.1 d MJD Modified Julian Date of observation
9- 12 F4.1 --- Phase Effective, lightcurve width corrected, phase
with respect to B band maximum
14- 18 A5 --- Filter Filter used in the observation
20- 24 F5.2 mag mag Observed magnitude in Filter (1)
26- 29 F4.2 mag e_mag Uncertainty in mag
31- 34 F4.2 mag AX Galactic extinction in Filter (2)
36 A1 --- Match [DM] V band match code (3)
38- 42 F5.2 mag Vmag V band magnitude (1)
44- 47 F4.2 mag e_Vmag Uncertainty in Vmag
49- 52 F4.2 mag AV Galactic extinction in the V band
54- 58 F5.2 mag Color Corresponding synthesized color of SN 2011fe
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Note (1): In the natural Vega system.
Note (2): The rest-frame magnitude can be obtained as mag - AX
Note (3): Code as follows:
D = Measured for the same epoch;
M = Calculated using the SNooPy model. The mean error of the data used for
the fit was adopted as the uncertainty of the magnitude.
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History:
From electronic version of the journal
(End) Prepared by [AAS], Tiphaine Pouvreau [CDS] 03-Jul-2017