J/ApJ/890/2 Full Spitzer IRAC obs. of SN1987A rise and fall (Arendt+, 2020)
Final Spitzer IRAC observations of the rise and fall of SN 1987A.
Arendt R.G., Dwek E., Bouchet P., Danziger I.J., Gehrz R.D., Park S.,
Woodward C.E.
<Astrophys. J., 890, 2-2 (2020)>
=2020ApJ...890....2A 2020ApJ...890....2A (SIMBAD/NED BibCode)
ADC_Keywords: Photometry, infrared; Supernovae
Keywords: Core-collapse supernovae; Supernova remnants; Circumstellar dust
Infrared astronomy; Large Magellanic Cloud; Light curves
Deconvolution; Be stars
Abstract:
Spitzer's final Infrared Array Camera observations of SN 1987A show
the 3.6 and 4.5µm emission from the equatorial ring (ER) continues
a period of steady decline. Deconvolution of the images reveals that
the emission is dominated by the ring, not the ejecta, and is
brightest on the west side. Decomposition of the marginally resolved
emission also confirms this, and shows that the west side of the ER
has been brightening relative to the other portions of the ER. The
infrared morphological changes resemble those seen in both the soft
X-ray emission and the optical emission. The integrated ER light
curves at 3.6 and 4.5µm are more similar to the optical light
curves than the soft X-ray light curve, though differences would be
expected if dust is responsible for this emission and its destruction
is rapid. Future observations with the James Webb Space Telescope will
continue to monitor the ER evolution, and will reveal the true
spectrum and nature of the material responsible for the broadband
emission at 3.6 and 4.5µm. The present observations also
serendipitously reveal a nearby variable source, subsequently
identified as a Be star, that has gone through a multiyear outburst
during the course of these observations.
Description:
We have examined the complete record of Spitzer IRAC observations of
SN 1987A which span the period from roughly 6000 to 12000 days after
the SN explosion (1987 Feb 23). These data include 3.6 and 4.5um
photometry.
Objects:
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RA (ICRS) DE Designation(s)
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05 35 28.02 -69 16 11.1 SN 1987A = NAME LMC SN
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 104 51 SN 1987A flux densities
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See also:
B/sn : Asiago Supernova Catalogue (Barbon et al., 1999-)
II/225 : Catalog of Infrared Observations, Edition 5 (Gezari+ 1999)
II/351 : VISTA Magellanic Survey (VMC) catalog (Cioni+, 2011)
II/342 : Hubble Source Catalog (V1 and V2) (Whitmore+, 2016)
I/345 : Gaia DR2 (Gaia Collaboration, 2018)
J/ApJS/99/223 : IUE UV Observations of SN 1987A (Pun+ 1995)
J/ApJS/152/251 : Indo-US library of coude feed stellar spectra (Valdes+, 2004)
J/AJ/132/2268 : SAGE calibration stars (Meixner+, 2006)
J/AJ/138/1003 : IR photometry of massive LMC stars (Bonanos+, 2009)
J/A+A/541/L1 : SN 1987A images at 350 and 870um (Lakicevic+, 2012)
J/A+A/541/L2 : SN 1987A 3mm image (Lakicevic+, 2012)
J/MNRAS/445/2440 : SN with associated Planck CMB temperatures (Yershov+, 2014)
J/AJ/151/146 : IRS spectra with features of silicates (Chen+, 2016)
J/AJ/153/252 : Phot. variability of BeSS-KELT stars (Labadie-Bartz+, 2017)
J/MNRAS/470/3250 : SAGE LMC point-sources classification (Jones+, 2017)
J/A+A/624/A116 : Constraints on the progenitor of SN 1987A (Utrobin+, 2019)
J/A+A/630/A92 : The Hubble Catalog of Variables (Bonanos+, 2019)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 8 F8.2 d Day [6130/11886] Days since explosion (1)
9- 16 F8.2 mJy S3.6 [0.58/1.3]? Spitzer/IRAC 3.6um flux density (2)
17- 24 F8.2 mJy e_S3.6 [0.01/0.02]? Uncertainty in S3.6
25- 32 F8.2 mJy S4.5 [0.9/2.3]? Spitzer/IRAC 4.5um flux density (2)
33- 40 F8.2 mJy e_S4.5 [0.01/0.02]? Uncertainty in S4.5
41- 48 F8.2 mJy S5.8 [1.46/3.92]? Spitzer/IRAC 5.8um flux density (2)
49- 56 F8.2 mJy e_S5.8 [0.02/0.05]? Uncertainty in S5.8
57- 64 F8.2 mJy S8 [4.6/13.6]? Spitzer/IRAC 8um flux density (2)
65- 72 F8.2 mJy e_S8 [0.03/0.07]? Uncertainty in S8
73- 80 F8.1 mJy S24 [26.3/75.7]? Spitzer/MIPS 24um flux density (2)
81- 88 F8.1 mJy e_S24 [1.8/1.9]? Uncertainty in S24
89- 97 I9 --- AOR [5030912/65861888] Spitzer AOR number
98-103 I6 --- PID [124/90117] Spitzer PID number
104 A1 --- f_PID [*] Flag on PID (3)
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Note (1): Day number 0 = 1987 Feb 23 (JD2446849.5).
Note (2): Fluxes of [0.41, 0.26, 0.16, 0.09, 0.01]mJy have been subtracted
at [3.6, 4.5, 5.8, 8, 24]um to account for the emission of Stars 2 & 3
in the aperture.
Note (3):
* = A program that specifically targeted SN 1987A.
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History:
From electronic version of the journal
(End) Prepared by [AAS], Emmanuelle Perret [CDS] 20-Jul-2021