Skip to main content Accessibility help
×
Home

The Zone of Avoidance as an X-ray absorber - the role of the galactic foreground modelling Swift XRT spectra

  • I. I. Racz (a1) (a2), Z. Bagoly (a1), L. V. Tóth (a1) (a2), L. G. Balázs (a1) (a2), I. Horvath (a3) and S. Zahorecz (a4) (a5)...

Abstract

Gamma-ray bursts (GRBs) are the most powerful explosive events in the Universe. The prompt gamma emission is followed by an X-ray afterglow that is also detected for over nine hundred GRBs by the Swift BAT and XRT detectors. The X-ray afterglow spectrum bears essential information about the burst, and the surrounding interstellar medium (ISM). Since the radiation travels through the line of sight intergalactic medium and the ISM in the Milky Way, the observed emission is influenced by extragalactic and galactic components. The column density of the Galactic foreground ranges several orders of magnitudes, due to both the large scale distribution of ISM and its small scale structures. We examined the effect of local HI column density on the penetrating X-ray emission, as the first step towards a precise modeling of the measured X-ray spectra. We fitted the X-ray spectra using the Xspec software, and checked how the shape of the initially power low spectrum changes with varying input Galactic HI column density. The total absorbing HI column is a sum of the intrinsic and Galactic component. We also investigated the model results for the intrinsic component varying the Galactic foreground. We found that such variations may alter the intrinsic hydrogen column density up to twenty-five percent. We will briefly discuss its consequences.

    • Send article to Kindle

      To send this article to your Kindle, first ensure no-reply@cambridge.org is added to your Approved Personal Document E-mail List under your Personal Document Settings on the Manage Your Content and Devices page of your Amazon account. Then enter the ‘name’ part of your Kindle email address below. Find out more about sending to your Kindle. Find out more about sending to your Kindle.

      Note you can select to send to either the @free.kindle.com or @kindle.com variations. ‘@free.kindle.com’ emails are free but can only be sent to your device when it is connected to wi-fi. ‘@kindle.com’ emails can be delivered even when you are not connected to wi-fi, but note that service fees apply.

      Find out more about the Kindle Personal Document Service.

      The Zone of Avoidance as an X-ray absorber - the role of the galactic foreground modelling Swift XRT spectra
      Available formats
      ×

      Send article to Dropbox

      To send this article to your Dropbox account, please select one or more formats and confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your <service> account. Find out more about sending content to Dropbox.

      The Zone of Avoidance as an X-ray absorber - the role of the galactic foreground modelling Swift XRT spectra
      Available formats
      ×

      Send article to Google Drive

      To send this article to your Google Drive account, please select one or more formats and confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your <service> account. Find out more about sending content to Google Drive.

      The Zone of Avoidance as an X-ray absorber - the role of the galactic foreground modelling Swift XRT spectra
      Available formats
      ×

Copyright

References

Hide All
Evans, P. A., Beardmore, A. P., Page, K. L., et al. 2007, A&A, 469, 379
Evans, P. A., Beardmore, A. P., Page, K. L., et al. 2009, MNRAS, 397, 1177
Kumar, P. & Zhang, B., 2015, Phys. Rep., 561, 1
Rácz, I. I., Bagoly, Z., Tóth, L. V., et al. 2017, Contributions of the Astronomical Observatory Skalnate Pleso, 47, 100
MathJax
MathJax is a JavaScript display engine for mathematics. For more information see http://www.mathjax.org.

Keywords

The Zone of Avoidance as an X-ray absorber - the role of the galactic foreground modelling Swift XRT spectra

  • I. I. Racz (a1) (a2), Z. Bagoly (a1), L. V. Tóth (a1) (a2), L. G. Balázs (a1) (a2), I. Horvath (a3) and S. Zahorecz (a4) (a5)...

Metrics

Full text views

Total number of HTML views: 0
Total number of PDF views: 0 *
Loading metrics...

Abstract views

Total abstract views: 0 *
Loading metrics...

* Views captured on Cambridge Core between <date>. This data will be updated every 24 hours.

Usage data cannot currently be displayed