J/MNRAS/487/832 BVRI photometry of the Type II-P SN 2017eaw (Buta+, 2019)
BVRI photometry of the classic Type II-P supernova 2017eaw in NGC 6946:
d 3 to d 594.
Buta R.J., Keel W.C.
<Mon. Not. R. Astron. Soc., 487, 832-844 (2019)>
=2019MNRAS.487..832B 2019MNRAS.487..832B (SIMBAD/NED BibCode)
ADC_Keywords: Supernovae ; Photometry, UBVRI
Keywords: supernovae: general - supernovae: individual: SN 2017eaw -
galaxies: individual: NGC 6946
Abstract:
Broadband BVRI light curves of SN 2017eaw in NGC 6946 reveal the
classic elements of a Type II-P supernova. The observations were begun
on 16 May 2017 (UT), approximately 1 d after the discovery was
announced, and the photometric monitoring was carried out over a
period of nearly 600d. The light curves show a well-defined plateau
and an exponential tail which curves slightly at later times. An
approximation to the bolometric light curve is derived and used to
estimate the amount of 56Ni created in the explosion; from various
approaches described in the literature, we obtain
M(56Ni)=0.115-0.022+0.027M☉. We also estimate that 43 per
cent of the bolometric flux emitted during the plateau phase is
actually produced by the 56Ni chain. Other derived parameters
support the idea that the progenitor was a red supergiant.
Description:
The tables summarize Johnson-Cousins BVRI photometry for both the
supernova and 62 field stars around NGC 6946 that were used as local
standard stars.
Objects:
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RA (2000) DE Designation(s)
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20 34 44.24 +60 11 35.9 SN 2017eaw = SPIRITS18k
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table3.dat 51 62 Local standard stars around NGC 6946
table4.dat 78 68 Photometry of SN 2017eaw
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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- 2 I2 --- No [1/62] Identification number (1)
4- 9 F6.3 mag Vmag V-band magnitude
11- 15 F5.3 mag B-V B-V color index
17- 21 F5.3 mag V-R V-R color index
23- 27 F5.3 mag R-I R-I color index
29- 33 F5.3 mag e_Vmag Mean error on Vmag
35- 39 F5.3 mag e_B-V Mean error on B-V
41- 45 F5.3 mag e_V-R Mean error on V-R
47- 51 F5.3 mag e_R-I Mean error on R-I
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Note (1): See Fig. 1 of the paper.
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Byte-by-byte Description of file: table4.dat
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Bytes Format Units Label Explanations
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1- 10 A10 "date" Obs.date Universal Time date (MM-DD-YYYY)
12- 18 F7.3 d Phase Nunber of days since explosion (1)
20- 25 F6.3 mag Bmag ?=- Johnson B-band magnitude
27- 32 F6.3 mag Vmag ?=- Johnson V-band magnitude
34- 39 F6.3 mag Rmag ?=- Cousins R-band magnitude
41- 46 F6.3 mag Imag ?=- Cousins I-band magnitude
48- 52 F5.3 mag e_Bmag ?=- mean error on Bmag
54- 58 F5.3 mag e_Vmag ?=- mean error on Vmag
60- 64 F5.3 mag e_Rmag ?=- mean error on Rmag
66- 70 F5.3 mag e_Imag ?=- mean error on Imag
72- 78 A7 --- Tel Telescope/facilities used (2)
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Note (1): Phase = JD(Obs.date) - JD2457886.5
Note (2): Telescope/facilities flag as follows:
UA-0.4m = University of Alabama
SARA-KP = Southeastern Association for Research in Astronomy, Kitt Peak
SARA-RM = Southeastern Association for Research in Astronomy,
Roque de los Muchachos
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Acknowledgements:
Ronald Buta, rbuta(at)ua.edu
(End) Ronald Buta [Alabama Univ., USA], Patricia Vannier [CDS] 31-Aug-2020