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Title: An adaptive-binning method for generating constant-uncertainty/constant-significance light curves with Fermi -LAT data

Abstract

Here, we present a method enabling the creation of constant-uncertainty/constant-significance light curves with the data of the Fermi-Large Area Telescope (LAT). The adaptive-binning method enables more information to be encapsulated within the light curve than with the fixed-binning method. Although primarily developed for blazar studies, it can be applied to any sources. Furthermore, this method allows the starting and ending times of each interval to be calculated in a simple and quick way during a first step. The reported mean flux and spectral index (assuming the spectrum is a power-law distribution) in the interval are calculated via the standard LAT analysis during a second step. In the absence of major caveats associated with this method Monte-Carlo simulations have been established. We present the performance of this method in determining duty cycles as well as power-density spectra relative to the traditional fixed-binning method.

Authors:
 [1];  [1];  [2];  [3]
  1. Univ. of Bordeaux and French National Center for Scientific Research (CNRS), Gradignan (France)
  2. Stockholm Univ. and Oskar Klein Centre for Cosmoparticle Physics (Sweden)
  3. Univ. of Paris Diderot (France)
Publication Date:
Research Org.:
SLAC National Accelerator Lab., Menlo Park, CA (United States)
Sponsoring Org.:
USDOE
Contributing Org.:
Fermi LAT Collaboration
OSTI Identifier:
1356721
Grant/Contract Number:  
AC02-76SF00515
Resource Type:
Accepted Manuscript
Journal Name:
Astronomy and Astrophysics
Additional Journal Information:
Journal Volume: 544; Journal ID: ISSN 0004-6361
Publisher:
EDP Sciences
Country of Publication:
United States
Language:
English
Subject:
79 ASTRONOMY AND ASTROPHYSICS; methods: data analysis

Citation Formats

Lott, B., Escande, L., Larsson, S., and Ballet, J. An adaptive-binning method for generating constant-uncertainty/constant-significance light curves with Fermi -LAT data. United States: N. p., 2012. Web. doi:10.1051/0004-6361/201218873.
Lott, B., Escande, L., Larsson, S., & Ballet, J. An adaptive-binning method for generating constant-uncertainty/constant-significance light curves with Fermi -LAT data. United States. doi:10.1051/0004-6361/201218873.
Lott, B., Escande, L., Larsson, S., and Ballet, J. Thu . "An adaptive-binning method for generating constant-uncertainty/constant-significance light curves with Fermi -LAT data". United States. doi:10.1051/0004-6361/201218873. https://www.osti.gov/servlets/purl/1356721.
@article{osti_1356721,
title = {An adaptive-binning method for generating constant-uncertainty/constant-significance light curves with Fermi -LAT data},
author = {Lott, B. and Escande, L. and Larsson, S. and Ballet, J.},
abstractNote = {Here, we present a method enabling the creation of constant-uncertainty/constant-significance light curves with the data of the Fermi-Large Area Telescope (LAT). The adaptive-binning method enables more information to be encapsulated within the light curve than with the fixed-binning method. Although primarily developed for blazar studies, it can be applied to any sources. Furthermore, this method allows the starting and ending times of each interval to be calculated in a simple and quick way during a first step. The reported mean flux and spectral index (assuming the spectrum is a power-law distribution) in the interval are calculated via the standard LAT analysis during a second step. In the absence of major caveats associated with this method Monte-Carlo simulations have been established. We present the performance of this method in determining duty cycles as well as power-density spectra relative to the traditional fixed-binning method.},
doi = {10.1051/0004-6361/201218873},
journal = {Astronomy and Astrophysics},
number = ,
volume = 544,
place = {United States},
year = {2012},
month = {7}
}

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