1 / 13

Lecture 6: Gamma-Ray Bursts Light extinction : Infrared background

Lecture 6: Gamma-Ray Bursts Light extinction : Infrared background. Multiwavelength Cosmic Background. Extragalactic infrared background effect on blazar spectrum. (z = 0.54). Light curves.

kagami
Download Presentation

Lecture 6: Gamma-Ray Bursts Light extinction : Infrared background

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Lecture 6: Gamma-Ray Bursts Light extinction: Infrared background

  2. Multiwavelength Cosmic Background

  3. Extragalactic infrared background effect on blazar spectrum (z = 0.54)

  4. Light curves. MAGIC (top) and optical R-band data (bottom) obtained for 3C 279 from February to March 2006. The long-term baseline for the optical flux is at 3 mJy. MAGIC Collaboration, Albert et al. Science 2008;320:1752-1754 Published by AAAS

  5. Spectrum of 3C 279 measured by MAGIC. Spectrum of 3C 279 measured by MAGIC. The gray area includes the combined statistical (1σ) and systematic errors, and underlines the marginal significance of detections at high energy. The dotted line shows compatibility of the measured spectrum with a power law of photon index α = 4.1. The blue and red triangles are measurements corrected on the basis of the two models for EBL density.

  6. Spectral energy distributions of 3C279 at the epochs of MAGIC observations: Feb 2006, Jan 2007, Jan-Feb 2009 Fermi-LAT 2007 2006 2009 Aleksic et al. 2011, arXiv:1101.2522

  7. Stecker et al. 1992, ApJ, 390, L49

  8. AGN scheme

  9. AGN scheme with various photon fields and geometrical structures

  10. High-z QSO spectra (Becker et al. 2001) The Intergalactic medium Absorbs radiation: Lyman alpha forest And Lyman continuum In high redshift quasars: intervening absorption by Clouds of neutral hydrogen

  11. Typical spectrum of starburst galaxy at z = 0.835 with GRB host overimposed (red dots) Paschen limit Balmer limit

  12. Typical spectrum of starburst at z = 2.036 with GRB host Overimposed (red) Balmer limit Lyman limit

More Related