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Catalogue XRT results for GRB 250725A
Data were analysed using HEASOFT version 6.35.2
Summary Information
| RA: | 02h 21m 55.02s | LC breaks: | 0 |
|---|---|---|---|
| Dec: | -82° 47′ 28.4′′ | LC type: | One-break, shallow first. |
| Err: | 2′′ | NH,intr.: | 2.79×1022 cm-2 |
| Gal long: | Redshift | 5.26 | |
| Gal lat: | Γ | 1.7 |
Jump to: 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).
Spectra
Since there are no breaks in the light curve, only the time-averaged spectra are shown below. 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.
Time-averaged spectrum (T0 + 828 to 63859 s)
Download spectral files for Time-averaged spectrum.
Plots to download
- both modes ps file
- both modes gif file
- wt mode ps file
- wt mode gif file
- pc mode ps file
- pc mode gif file
WT mode. Mean photon arrival: T0+858 s
| NH (Galactic) | 9.21 × 1020 cm-2 |
|---|---|
| NH (intrinsic) | 7 (+63, -7) × 1021 cm-2 |
| z of absorber | 5.26 |
| Photon index | 1.67 (+0.23, -0.17) |
| Flux (0.3-10 keV) (Observed) | 2.2 (+0.3, -0.3) × 10-10 erg cm-2 s-1 |
| Flux (0.3-10 keV) (Unabsorbed) | 2.5 (+0.3, -0.3) × 10-10 erg cm-2 s-1 |
| Counts to flux (obs) | 3.78 × 10-11 erg cm-2 ct-1 |
| Counts to flux (unabs) | 4.29 × 10-11 erg cm-2 ct-1 |
| W-stat (dof) What's this? | 184.58 (223) |
| Spectrum exposure | 64 s |
PC mode. Mean photon arrival: T0+4818 s
| NH (Galactic) | 9.21 × 1020 cm-2 |
|---|---|
| NH (intrinsic) | 2.8 (+2.3, -2.1) × 1022 cm-2 |
| z of absorber | 5.26 |
| Photon index | 1.73 (+0.09, -0.08) |
| Flux (0.3-10 keV) (Observed) | 1.82 (+0.11, -0.10) × 10-11 erg cm-2 s-1 |
| Flux (0.3-10 keV) (Unabsorbed) | 2.137 (+0.102, -0.099) × 10-11 erg cm-2 s-1 |
| Counts to flux (obs) | 4.03 × 10-11 erg cm-2 ct-1 |
| Counts to flux (unabs) | 4.74 × 10-11 erg cm-2 ct-1 |
| W-stat (dof) What's this? | 425.45 (456) |
| Spectrum exposure | 10.6 ks |
Comparison with other bursts
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 250725A 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 Tb, 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 | NH | Spectral indices |
|---|---|---|---|
 |
 |
 |
 |
Closure Relationships
The plots below show (α, β) scatter plots for each phase of all One-break, shallow first light curves. GRB 250725A 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.
| One-break, shallow first Shallow phase | One-break, shallow first Steep phase |
|---|---|
 |  |