| タイトル | Identifying High-Redshift Gamma-Ray Bursts with RATIR |
| 本文（外部サイト） | http://hdl.handle.net/2060/20150011094 |
| 著者（英） | Lee, W. H.; Gehrels, N.; Bloom, J. S.; Richer, M. G.; de Diego, J. A.; Georgiev, L.; Butler, N. R.; Ramirez-Ruiz, E.; Klein, C. R.; Prochaska, J. X.; Gonzalez, J.; Cucchiara, A.; Moseley, H.; Watson, A. M.; Fox, O. D.; Troja, E.; Roman-Zuniga, C. G.; Littlejohns, O. M.; Kutyrev, A. S. |
| 著者所属（英） | NASA Goddard Space Flight Center |
| 発行日 | 2014-05-23 |
| 言語 | eng |
| 内容記述 | We present a template-fitting algorithm for determining photometric redshifts, zeta(sub phot), of candidate high-redshift gamma-ray bursts (GRBs). Using afterglow photometry, obtained by the Reionization and Transients InfraRed (RATIR) camera, this algorithm accounts for the intrinsic GRB afterglow spectral energy distribution, host dust extinction, and the effect of neutral hydrogen (local and cosmological) along the line of sight. We present the results obtained by this algorithm and the RATIR photometry of GRB 130606A, finding a range of best-fit solutions, 5.6 less than zeta(sub phot) less than 6.0, for models of several host dust extinction laws (none, the Milky Way, Large Magellanic Clouds, and Small Magellanic Clouds), consistent with spectroscopic measurements of the redshift of this GRB. Using simulated RATIR photometry, we find that our algorithm provides precise measures of zeta(sub phot) in the ranges of 4 less than zeta(sub phot) 8 and 9 less than zeta(sub phot) less than 10 and can robustly determine when zeta(sub phot) greater than 4. Further testing highlights the required caution in cases of highly dust-extincted host galaxies. These tests also show that our algorithm does not erroneously find zeta(sub phot) less than 4 when zeta(sub sim) greater than 4, thereby minimizing false negatives and allowing us to rapidly identify all potential high-redshift events. |
| NASA分類 | Instrumentation and Photography |
| レポートNO | GSFC-E-DAA-TN21478 |
| 権利 | Copyright, Distribution as joint owner in the copyright |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/558777 |
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