How real detector thresholds create false standard candles
Document Type
Conference Proceeding
Publication Date
11-27-2009
Abstract
GRB satellites are relatively inefficient detectors of dim hard bursts. For example, given two bursts of identical peak luminosity near the detection threshold, a dim soft burst will be preferentially detected over a dim hard burst. This means that a high Epeak burst will need a higher peak luminosity to be detected than a low Epeak GRB. This purely detector-created attribute will appear as a correlation between Epeak and luminosity, and should not be interpreted as a real standard candle effect. This result derives from Monte Carlo simulations utilizing a wide range of initial GRB spectra, and retriggering to create a final "detected" sample. In sum, Epeak is not a good standard candle, and its appearance as such in seeming correlations such as the Amati and other Liso vs. Epeak relations is likely a ghost of real energy-related detection thresholds. © 2009 American Institute of Physics.
Publication Title
AIP Conference Proceedings
Recommended Citation
Shahmoradi, A.,
&
Nemiroff, R.
(2009).
How real detector thresholds create false standard candles.
AIP Conference Proceedings,
1133, 425-427.
http://doi.org/10.1063/1.3155940
Retrieved from: https://digitalcommons.mtu.edu/michigantech-p/8880