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 burst will need a higher peak luminosity to be detected than a low GRB. This purely detector‐created attribute will appear as a correlation between 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, is not a good standard candle, and its appearance as such in seeming correlations such as the Amati and other vs. relations is likely a ghost of real energy‐related detection thresholds.
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25 May 2009
GAMMA‐RAY BURST: Sixth Huntsville Symposium
20–23 October 2008
Huntsville (Alabama)
Research Article|
May 25 2009
How Real Detector Thresholds Create False Standard Candles
Amir Shahmoradi;
Amir Shahmoradi
aDepartment of Physics, Michigan Technological University
Search for other works by this author on:
Robert Nemiroff
Robert Nemiroff
aDepartment of Physics, Michigan Technological University
Search for other works by this author on:
Amir Shahmoradi
a
Robert Nemiroff
a
aDepartment of Physics, Michigan Technological University
AIP Conf. Proc. 1133, 425–427 (2009)
Citation
Amir Shahmoradi, Robert Nemiroff; How Real Detector Thresholds Create False Standard Candles. AIP Conf. Proc. 25 May 2009; 1133 (1): 425–427. https://doi.org/10.1063/1.3155940
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