J/ApJ/702/226 Swift/UVOT panchromatic observations of SN 2008D (Modjaz+, 2009)
From shock breakout to peak and beyond: extensive panchromatic observations of
the type Ib supernova 2008D associated with Swift X-ray transient 080109.
Modjaz M., Li W., Butler N., Chornock R., Perley D., Blondin S.,
Bloom J.S., Filippenko A.V., Kirshner R.P., Kocevski D., Poznanski D.,
Hicken M., Foley R.J., Stringfellow G.S., Berlind P.,
Barrado Y Navascues D., Blake C.H., Bouy H., Brown W.R., Challis P.,
Chen H., de Vries W.H., Dufour P., Falco E., Friedman A., Ganeshalingam M.,
Garnavich P., Holden B., Illingworth G., Lee N., Liebert J., Marion G.H.,
Olivier S.S., Prochaska J.X., Silverman J.M., Smith N., Starr D.,
Steele T.N., Stockton A., Williams G.G., Wood-Vasey W.M.
<Astrophys. J., 702, 226-248 (2009)>
=2009ApJ...702..226M 2009ApJ...702..226M
ADC_Keywords: Supernovae ; Ultraviolet ; Photometry, UBV
Keywords: galaxies: distances and redshifts - galaxies: individual (NGC 2770) -
supernovae: general - supernovae: individual (SN 2008D)
Abstract:
We present extensive early photometric (ultraviolet through
near-infrared) and spectroscopic (optical and near-infrared) data on
supernova (SN) 2008D as well as X-ray data analysis on the associated
Swift X-ray transient (XRT) 080109. Our data span a time range of 5hr
before the detection of the X-ray transient to 150 days after its
detection, and a detailed analysis allowed us to derive constraints on
the nature of the SN and its progenitor; throughout we draw
comparisons with results presented in the literature and find several
key aspects that differ. Our data first established that SN 2008D is a
spectroscopically normal SN Ib (i.e., showing conspicuous He lines)
and showed that SN 2008D had a relatively long rise time of 18 days
and a modest optical peak luminosity. The early-time light curves of
the SN are dominated by a cooling stellar envelope (for
Δt∼0.1-4days, most pronounced in the blue bands) followed by
56Ni decay.
Description:
We retrieved the level-2 UVOT data for SN 2008D from the Swift data
archive in all available filters (i.e., in the UVW2, UVM2, UVW1, U, B,
and V filters).
Objects:
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RA (2000) DE Designation(s)
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09 09 30.6 +33 08 20 SN 2008D = XRF 080109
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table5.dat 40 121 Swift/UVOT photometry of SN 2008D
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See also:
J/ApJ/692/L84 : Photometry of SN 2008D (Malesani+, 2009)
http://swift.gsfc.nasa.gov/docs/swift/archive/ : SWIFT archive page
Byte-by-byte Description of file: table5.dat
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Bytes Format Units Label Explanations
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1- 7 F7.4 d DelT Time in days since 2008-01-09 13:32:49 (1)
9- 14 F6.4 d BinT Time bin (2)
16- 23 F8.2 s Exp Total exposure time
25 A1 --- l_mag Limit flag on mag
26- 30 F5.2 mag mag Observed magnitude in Filt
32- 35 F4.2 mag e_mag ? The 1σ uncertainty in mag (3)
37- 40 A4 --- Filt Filter used in the observation (UVW2, UVM2,
UVW1, U, B or V)
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Note (1): Middle point of the combined image.
Note (2): From the start of the first exposure to the end of the last exposure
in the combined image.
Note (3): Doesn't include systematic uncertainties.
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History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Emmanuelle Perret [CDS] 27-Sep-2011