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Titre du document / Document title

How to handle calibration uncertainties in high-energy Astrophysics

Auteur(s) / Author(s)

KASHYAP Vinay L. (1) ; LEE Hyunsook (1) ; SIEMIGINOWSKA Aneta (1) ; MCDOWELL Jonathan (1) ; ROTS Arnold (1) ; DRAKE Jeremy (1) ; RATZLAFF Pete (1) ; ZEZAS Andreas (1) ; IZEM Rima (2) ; CONNORS Alanna (3) ; VAN DYK David (4) ; PARK Taeyoung (5) ;

Affiliation(s) du ou des auteurs / Author(s) Affiliation(s)

(1) Harvard-Smithsonian Center for Astrophysics, Cambridge, MA, ETATS-UNIS
(2) Harvard University, Cambridge, MA, ETATS-UNIS
(3) Eureka Scientific, Arlington, MA, ETATS-UNIS
(4) Univ. of California, Irvine, CA, ETATS-UNIS
(5) Univ. of Pennsylvania, Pittsburgh, PA, ETATS-UNIS

Résumé / Abstract

Unlike statistical errors, whose importance has been well established in astronomical applications, uncertainties in instrument calibration are generally ignored. Despite wide recognition that uncertainties in calibration can cause large systematic errors, robust and principled methods to account for them have not been developed, and consequently there is no mechanism by which they can be incorporated into standard astronomical data analysis. Here we present a framework where they can be encoded such that they can be brought within the scope of analysis. We describe this framework, which is based on a modified MCMC algorithm, and propose a format standard derived from experience with effective area measurements of the ACIS-S detector on Chandra that can be applied to any instrument or method of codifying systematic errors. Calibration uncertainties can then be propagated into model parameter estimates to produce error bars that include systematic error information.

Revue / Journal Title

Proceedings of SPIE, the International Society for Optical Engineering    ISSN  0277-786X   CODEN PSISDG 

Source / Source

Congrès
Observatory operations :   ( strategies, processes, and systems II )  ( 24-26 June, 2008, Marseiile, France )
Observatory operations : strategies, processes, and systems No2, Marseille , FRANCE (2008)
2008  , vol. 7016, pp. 70160P.1-70160P.8[Note(s) : various pagings, ] (9 ref.) ISBN 978-0-8194-7226-7 ; 0-8194-7226-3 ;  Illustration : Illustration ;

Langue / Language

Anglais

Editeur / Publisher

Society of Photo-Optical Instrumentation Engineers, Bellingham, WA, ETATS-UNIS  (1981) (Revue)
SPIE, Bellingham, Wash., ETATS-UNIS  (2008) (Monographie)

Mots-clés anglais / English Keywords

Models

;

Uncertainty

;

Astronomical observatories

;

Space application

;

Measuring methods

;

Calibration

;

Algorithms

;

Data analysis

;

Mots-clés français / French Keywords

0705K

;

0787

;

0130C

;

Modèle

;

Incertitude

;

Observatoire astronomique

;

Application spatiale

;

Méthode mesure

;

Etalonnage

;

Algorithme

;

Analyse donnée

;

Mots-clés espagnols / Spanish Keywords

Modelo

;

Incertidumbre

;

Aplicación espacial

;

Localisation / Location

INIST-CNRS, Cote INIST : 21760, 35400017290504.0200

Nº notice refdoc (ud4) : 21132289



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