J/ApJ/691/723 BVIJHKs observations of GRB 080319B (Bloom+, 2009)
Observations of the naked-eye GRB 080319B: implications of nature's brightest
explosion.
Bloom J.S., Perley D.A., Li W., Butler N.R., Miller A.A., Kocevski D.,
Kann D.A., Foley R.J., Chen H.-W., Filippenko A.V., Starr D.L.,
Macomber B., Prochaska J.X., Chornock R., Poznanski D., Klose S.,
Skrutskie M.F., Lopez S., Hall P., Glazebrook K., Blake C.H.
<Astrophys. J., 691, 723-737 (2009)>
=2009ApJ...691..723B 2009ApJ...691..723B
ADC_Keywords: Photometry, infrared ; Photometry, UBVRI ; Gamma rays
Keywords: galaxies: high-redshift - gamma rays: bursts - gamma rays:
observations - supernovae: general
Abstract:
The first gamma-ray burst (GRB) confirmed to be bright enough to be
seen with the naked eye, GRB 080319B at redshift z=0.937, allowed for
exquisite follow-up observations across the electromagnetic spectrum.
We present our detailed optical and infrared (IR) observations of the
afterglow, consisting of over 5000 images starting 51s after the GRB
trigger, in concert with our own analysis of the Swift UVOT, Burst
Alert Telescope (BAT), and XRT data. The event is extreme not only in
observed properties but also intrinsically: it was the most luminous
event ever recorded at optical and IR wavelengths and had an
exceedingly high isotropic-equivalent energy release in γ-rays.
At early times, the afterglow evolution is broadly consistent with
being reverse-shock dominated, but then is subsumed by a forward shock
at around 1000s. The overall spectral energy distribution, spanning
from ultraviolet through near-IR wavelengths, shows no evidence for a
significant amount of dust extinction in the host frame. The afterglow
evolution, however, is highly chromatic: starting at about 1000s the
index shifts blueward before shifting back to the red at late times.
In our deepest late-time observations, we find tentative evidence for
an optical jet break and a luminous supernova. Finally, we examine the
detectability of such events with current and future facilities and
find that such an event could be detected in gamma rays by BAT out to
z=10.7 (8σ), while the nominal EXIST sensitivity would allow
detection to z∼32. At the K band, this source would have been easily
detected with meter-class telescopes to z∼17.
Description:
The Peters Automated Infrared Imaging Telescope (PAIRITEL), responding
automatically to the Swift trigger via an open-source package
connected to the GCN, began taking data on the field at 06:13:39.7
(t=51s after the Swift trigger). The 1.3m telescope is equipped with
NICMOS3 arrays to simultaneously observe in bands J, H, and Ks.
At the Lick Observatory, the Katzman Automatic Imaging Telescope
(KAIT) GRB alert system responded to GRB 080319B automatically. Our
first observations of GRB 080319B did not start until 19 min after the
BAT trigger.
Objects:
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RA (2000) DE Designation(s)
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14 31 40.7 +36 17 58 GRB 080319B = GRB 080319B
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 51 406 PAIRITEL observations of GRB 080319B
table2.dat 42 65 PAIRITEL short-read observations of GRB 080319B
during saturated regime
table3.dat 42 69 PAIRITEL annulus photometry of GRB 080319B
during saturated regime
table4.dat 49 131 KAIT observations of GRB 080319B
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See also:
J/ApJ/491/93 : JHK photometry of 9 gamma-ray burst fields (Larson+ 1997)
J/ApJ/686/1209 : Optical properties of GRB afterglows (Melandri+, 2008)
http://gcn.gsfc.nasa.gov/ : The Gamma-ray bursts Coordinates Network (GCN)
home page
Byte-by-byte Description of file: table[14].dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 7 F7.1 s Tmid Exposure mid-time (G1)
9- 13 A5 --- Filt Filter used in observation (JHKs for table 1
or BVIclear for table 4)
15- 20 F6.1 s Exp Exposure time
22- 27 F6.3 mag mag Observed magnitude in Filt (G2)
29- 33 F5.3 mag e_mag Uncertainty in mag
35- 42 F8.1 uJy Flux Observed flux density in Filt (G2)
44- 49 F6.1 uJy e_Flux Uncertainty in Flux
51 A1 --- Flag [X] Indicates data not used in modeling (only
for table 1)
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Byte-by-byte Description of file: table[23].dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 5 F5.1 s Tmid Exposure mid-time (G1)
7- 10 A4 --- Filt Filter used in observation (J, H, or Ks)
12- 16 F5.3 s Exp Exposure time
18- 22 F5.3 mag mag Observed magnitude in Filt (G2)
24- 28 F5.3 mag e_mag Uncertainty in mag
30- 35 E6.3 uJy Flux Observed flux density in Filt (G2)
37- 42 E6.3 uJy e_Flux Uncertainty in Flux
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Global notes:
Note (G1): Measured from the Swift trigger (2008-03-19, UTC 06:12:49).
Note (G2): Not corrected for Galactic extinction.
History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Emmanuelle Perret [CDS] 23-Feb-2011