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Catalogue XRT results for GRB 080607

Data were analysed using HEASOFT version 6.32

Summary Information

RA:	12h 59m 47.22s	LC breaks:	5
Dec:	+15° 55′ 10.0′′	LC type:	Canonical.
Err:	1.4′′	N_H,intr.:	3.99×10²² cm^-2
Gal long:	313.163	Redshift	3.04
Gal lat:	78.625	Γ	2.0

Show light curve? | Show spectrum? | Show comparison with other bursts?

Jump to: Light curve | Spectra | Compare to other bursts.

If you use any of these data, please cite Evans et al. (2009), which describes how these products were created (see the usage policy for more information).

Light curve

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This light curve comes from the light curve repository (if you use it, please cite Evans et al [2007, 2009]. Flares, marked by cross-hatched regions, are identified automatically, but may have been manually corrected. These are excluded from the fit. Any power-law breaks added to the fit must be required at the 4-σ level (according to an f-test) to be included in the best-fit. Details of all fits attempted are given below the plot. For more information see the light curve fitting documentation.

Fit Details

N_breaks	χ²	dof	Comments
0	990	243
1	518	241	Break required. (1.43e-32 % probability of chance improvement)
2	414	239	Break required. (2.01e-10 % probability of chance improvement)
3	366	237	Break required. (5.97e-05 % probability of chance improvement)
4	349	235	Break significance <4-σ (0.28 % probability of chance improvement)
5	291	233	Break required. (5.74e-09 % probability of chance improvement). This is the best fit.

There are 2 flares excluded from the fit:

86.0—98.1 s
117—185 s

The best-fitting light curve has 5 breaks.

Click on the number of breaks in the table to the right to change which fit is plotted above and detailed below.

Currently showing the best fit.

α₁	1.60 (+0.17, -1.02)
T_b,1	190 (+5, -26) s
α₂	4.89 (+1.44, -0.53)
T_b,2	222 (+5, -9) s
α₃	1.886 (+0.103, -0.084)
T_b,3	641 (+69, -78) s
α₄	-0.1 (+0.7, -0.8)
T_b,4	2104 (+1.12 × 10³, -431) s
α₅	2.28 (+0.22, -0.15)
T_b,5	1.24 (+0.25, -0.26) × 10⁴ s
α₆	1.45 (+0.09, -0.08)

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Spectra

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Spectra have been created for each power-law segment in the best fitting light curve (shown above). Times of flaring have not been removed, however this makes little difference to most spectra (see Fig 7/8c of Evans et al. 2009). For more information see the time-resolved spectroscopy documentation.

phase1 spectrum (T0 + 85 to 189 s)

Download spectral files for phase1 spectrum.

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WT mode. Mean photon arrival: T0+139 s

N_H (Galactic)	1.82 × 10²⁰ cm^-2
N_H (intrinsic)	7.1 (+0.6, -0.6) × 10²² cm^-2
z of absorber	3.04
Photon index	1.89 (+0.05, -0.04)
Flux (0.3-10 keV) (Observed)	7.47 (+0.21, -0.21) × 10^-9 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	1.007 (+0.025, -0.024) × 10^-8 erg cm^-2 s^-1
Counts to flux (obs)	3.76 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	5.07 × 10^-11 erg cm^-2 ct^-1
W-stat (dof) What's this?	610.54 (672)
Spectrum exposure	103 s

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phase2 spectrum (T0 + 189 to 222 s)

Download spectral files for phase2 spectrum.

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WT mode. Mean photon arrival: T0+203 s

N_H (Galactic)	1.82 × 10²⁰ cm^-2
N_H (intrinsic)	5.5 (+1.0, -0.9) × 10²² cm^-2
z of absorber	3.04
Photon index	2.24 (+0.12, -0.11)
Flux (0.3-10 keV) (Observed)	1.62 (+0.11, -0.10) × 10^-9 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	2.48 (+0.17, -0.15) × 10^-9 erg cm^-2 s^-1
Counts to flux (obs)	3.03 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	4.62 × 10^-11 erg cm^-2 ct^-1
W-stat (dof) What's this?	339.42 (379)
Spectrum exposure	32 s

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phase3 spectrum (T0 + 222 to 641 s)

Download spectral files for phase3 spectrum.

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WT mode. Mean photon arrival: T0+346 s

N_H (Galactic)	1.82 × 10²⁰ cm^-2
N_H (intrinsic)	5.5 (+0.6, -0.6) × 10²² cm^-2
z of absorber	3.04
Photon index	2.09 (+0.06, -0.06)
Flux (0.3-10 keV) (Observed)	5.02 (+0.19, -0.18) × 10^-10 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	7.15 (+0.25, -0.23) × 10^-10 erg cm^-2 s^-1
Counts to flux (obs)	3.27 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	4.66 × 10^-11 erg cm^-2 ct^-1
W-stat (dof) What's this?	521.70 (551)
Spectrum exposure	339 s

PC mode. Mean photon arrival: T0+600 s

N_H (Galactic)	1.82 × 10²⁰ cm^-2
N_H (intrinsic)	2.1 (+3.0, -2.1) × 10²² cm^-2
z of absorber	3.04
Photon index	1.6 (+0.3, -0.3)
Flux (0.3-10 keV) (Observed)	2.6 (+0.7, -0.5) × 10^-10 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	2.9 (+0.6, -0.5) × 10^-10 erg cm^-2 s^-1
Counts to flux (obs)	4.14 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	4.61 × 10^-11 erg cm^-2 ct^-1
W-stat (dof) What's this?	75.62 (99)
Spectrum exposure	77 s

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phase4 spectrum (T0 + 641 to 1047 s)

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PC mode. Mean photon arrival: T0+845 s

N_H (Galactic)	1.82 × 10²⁰ cm^-2
N_H (intrinsic)	4.9 (+1.7, -1.4) × 10²² cm^-2
z of absorber	3.04
Photon index	1.80 (+0.16, -0.15)
Flux (0.3-10 keV) (Observed)	1.91 (+0.21, -0.19) × 10^-10 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	2.39 (+0.20, -0.19) × 10^-10 erg cm^-2 s^-1
Counts to flux (obs)	3.88 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	4.86 × 10^-11 erg cm^-2 ct^-1
W-stat (dof) What's this?	261.77 (286)
Spectrum exposure	406 s

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phase5 spectrum (T0 + 4228 to 12416 s)

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PC mode. Mean photon arrival: T0+6673 s

N_H (Galactic)	1.82 × 10²⁰ cm^-2
N_H (intrinsic)	5.5 (+1.4, -1.3) × 10²² cm^-2
z of absorber	3.04
Photon index	2.13 (+0.16, -0.15)
Flux (0.3-10 keV) (Observed)	1.29 (+0.12, -0.11) × 10^-11 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	1.86 (+0.17, -0.14) × 10^-11 erg cm^-2 s^-1
Counts to flux (obs)	3.25 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	4.71 × 10^-11 erg cm^-2 ct^-1
W-stat (dof) What's this?	235.77 (295)
Spectrum exposure	5.0 ks

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phase6 spectrum (T0 + 12418 to 376469 s)

Download spectral files for phase6 spectrum.

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PC mode. Mean photon arrival: T0+55440 s

N_H (Galactic)	1.82 × 10²⁰ cm^-2
N_H (intrinsic)	1.9 (+1.2, -1.0) × 10²² cm^-2
z of absorber	3.04
Photon index	2.15 (+0.21, -0.20)
Flux (0.3-10 keV) (Observed)	2.7 (+0.4, -0.3) × 10^-13 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	3.4 (+0.4, -0.3) × 10^-13 erg cm^-2 s^-1
Counts to flux (obs)	3.03 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	3.80 × 10^-11 erg cm^-2 ct^-1
W-stat (dof) What's this?	193.78 (224)
Spectrum exposure	72.5 ks

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Comparison with other bursts

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Parameter distributions

The plots below show the probability density functions of the temporal and time-averaged spectral parameters for all GRBs, with the data for GRB 080607 shown on in colour. Click the images for larger versions.

For all plots, the solid vertical lines mark the values for this GRB, and the dashed lines the 1-σ uncertainties. For α and T_b, the colour changes for each phase. For the spectral parameters, the WT fits are shown in blue and the PC in red. These figures correspond to Figs. 5,6, 7a and 8a of Evans et al. (2009). See the PDF documentation for more information.

Temporal indices	Break Times	N_H	Spectral indices

Closure Relationships

The plots below show (α, β) scatter plots for each phase of all Canonical light curves. GRB 080607 is shown in colour; where multiple points appear in a given phase (e.g. WT and PC mode spectra for that phase), the different colours refer to different spectra. α and β are the temporal and spectral energy power-law indices respectively. The shaded regions mark those allowed by the standard closure relationships. These figures correspond to Fig. 10 of Evans et al. (2009). See the closure relationship documentation for more information.

Canonical Steep phase	Canonical Plateau	Canonical 'Normal'	Canonical Post jet-break

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