J/AJ/141/163 Ultimate light curve of SN 1998bw/GRB 980425 (Clocchiatti+, 2011)
The ultimate light curve of SN 1998bw/GRB 980425.
Clocchiatti A., Suntzeff N.B., Covarrubias R., Candia P.
<Astron. J., 141, 163 (2011)>
=2011AJ....141..163C 2011AJ....141..163C
ADC_Keywords: Supernovae ; Photometry, UBVRI ; Gamma rays
Keywords: gamma-ray burst: general - supernovae: general -
supernovae: individual (SN 1998bw)
Abstract:
We present multicolor light curves of SN 1998bw which appeared in
ESO184-G82 in close temporal and spatial association with GRB 980425.
The light curves are based on observations conducted at Cerro Tololo
Inter-American Observatory (CTIO) and data from the literature. The
CTIO photometry reaches ∼86-days after the gamma-ray burst (GRB) in U
and ∼160-days after the GRB in BV(RI)C. The observations in U extend
the previously known coverage by about 30-days and determine the slope
of the early exponential tail. We calibrate a large set of local
standards in common with those of previous studies and use them to
transform published observations of the supernova (SN) to our
realization of the standard photometric system.
Description:
The CTIO observations started ∼40-days after the GRB (about a month
after maximum light). The 0.9m telescope with a direct CCD camera
attached was used. The detector was a TEK 2048 CCD, with a pixel size
of 24um, providing a scale of 0.396arcsec/pix. The passbands routinely
used were the standard UBV(RI)C of the Johnson-Kron-Cousins
photometric system.
Objects:
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RA (2000) DE Designation(s)
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19 35 03.17 -52 50 46.1 SN 1998bw = SN 1998bw
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 65 25 Local standard sequence for SN 1998bw
table2.dat 64 79 Photometry of SN 1998bw transformed to CTIO System
table3.dat 95 495 Intrinsic light curve of SN 1998bw
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Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 2 I2 --- ID Standard ID number (1)
3 A1 --- n_ID [b] Star outside Fig.1 (2)
5- 10 F6.3 mag Vmag Johnson V magnitude
12- 16 F5.3 mag e_Vmag rms uncertainty on Vmag
18- 22 F5.3 mag B-V Johnson B-V colour index
24- 28 F5.3 mag e_B-V rms uncertainty on B-V
30- 35 F6.3 mag U-B ?=- Johnson U-B colour index
37- 41 F5.3 mag e_U-B ?=- rms uncertainty on U-B
43- 47 F5.3 mag V-Rc Johnson-Cousins V-R colour index
49- 53 F5.3 mag e_V-Rc rms uncertainty on V-Rc
55- 59 F5.3 mag V-Ic Johnson-Cousins V-I colour index
61- 65 F5.3 mag e_V-Ic rms uncertainty on V-Ic
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Note (1): Star numbers 1-15 are the same as those of Galama et al.
(1998Natur.395..670G 1998Natur.395..670G).
Note (2): b: Star number 25 falls outside the finding chart of Figure 1.
It is located 23.1" north and 20.6" east from star number 19.
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Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 7 F7.2 d JD Mean Julian Date (JD-2450000)
9- 13 F5.2 mag Umag ?=- Johnson U magnitude
15- 18 F4.2 mag e_Umag ?=- rms uncertainty on Umag
20- 24 F5.2 mag Bmag ?=- Johnson B magnitude
26- 29 F4.2 mag e_Bmag ?=- rms uncertainty on Bmag
31- 35 F5.2 mag Vmag ?=- Johnson V magnitude
37- 40 F4.2 mag e_Vmag ?=- rms uncertainty on Vmag
42- 46 F5.2 mag Rcmag ?=- Cousins R magnitude
48- 51 F4.2 mag e_Rcmag ?=- rms uncertainty on Rcmag
53- 57 F5.2 mag Icmag ?=- Cousins I magnitude
59- 62 F4.2 mag e_Icmag ?=- rms uncertainty on Icmag
64 I1 --- Ref Reference (1)
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Note (1): References for photometry as follows:
1 = Galama et al. (1998Natur.395..670G 1998Natur.395..670G)
2 = this work
3 = Sollerman et al. (2002A&A...386..944S 2002A&A...386..944S)
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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- 4 I4 d JD Mean Julian Date (JD-2450000.0)
6- 10 F5.1 d Phase Rest frame days after γ-ray burst
12- 16 F5.2 mag Umag ?=- Intrinsic Johnson U band magnitude
18- 21 F4.2 mag e_Umag ?=- Uncertainty in Umag (1)
23- 27 F5.2 mag Bmag ?=- Intrinsic Johnson B band magnitude
29- 32 F4.2 mag e_Bmag ?=- Uncertainty in Bmag (1)
34- 38 F5.2 mag Vmag ?=- Intrinsic Johnson V band magnitude
40- 43 F4.2 mag e_Vmag ?=- Uncertainty in Vmag (1)
45- 49 F5.2 mag Rcmag ?=- Intrinsic Cousins R band magnitude
51- 54 F4.2 mag e_Rcmag ?=- Uncertainty in Rmag (1)
56- 60 F5.2 mag Icmag ?=- Intrinsic Cousins I band magnitude
62- 65 F4.2 mag e_Icmag ?=- Uncertainty in Imag (1)
67- 73 F7.3 10+37W/m2 FUBVRI ? Integrated UBVRcIc flux (2)
75- 80 F6.3 10+37W/m2 e_FUBVRI ? Uncertainty in FUBVRI
82- 88 F7.3 10+37W/m2 FBVRI Integrated BVRcIc flux (2)
90- 95 F6.3 10+37W/m2 e_FBVRI Uncertainty in FBVRIC
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Note (1): The uncertainties are the result of combining in quadrature the
uncertainties of photometry, reddening and K-corrections.
Note (2): Units are 1040erg/cm2/s. Uncertainty does not include
the ∼7% uncertainty in the distance.
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History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Patricia Vannier [CDS] 06-Sep-2012