An algorithm for locating PSF-Like events and computing the centroid in X-ray images

Joanne E. Hill; Chaitanya Cheruvu; Tony F. Abbey; Richard M. Ambrosi; David N. Burrows; Alexander D.T. Short; Alan Wells; John A. Nousek

doi:10.1117/12.461495

An algorithm for locating PSF-Like events and computing the centroid in X-ray images

Joanne E. Hill, Chaitanya Cheruvu, Tony F. Abbey, Richard M. Ambrosi, David N. Burrows, Alexander D.T. Short, Alan Wells, John A. Nousek

Astronomy & Astrophysics

Research output: Contribution to journal › Conference article › peer-review

6 Scopus citations

Abstract

The Swift X-ray Telescope (XRT)[1] is designed to make astrometric, spectroscopic, and photometric observations of X-ray emission from Gamma-ray Bursts and their afterglows in the energy band 0.2-10 keV. The XRT has a variety of readout modes which it automatically selects in order to observe objects covering 7 orders of magnitude in flux and to extract the maximum possible science from each one, in response to the flux from the burst diminishing. The primary goal of the XRT is to locate the position of the Gamma-Ray Burst to 1 arcsec and to transmit this position to the UVOT and the ground within 100 seconds of the initial observation of the burst. We describe in detail the use of imaging mode and a centroid algorithm to determine the position of the Gamma-Ray Burst with sub-pixel accuracy.

Original language	English (US)
Pages (from-to)	1347-1355
Number of pages	9
Journal	Proceedings of SPIE - The International Society for Optical Engineering
Volume	4851
Issue number	2
DOIs	https://doi.org/10.1117/12.461495
State	Published - 2002
Event	X-Ray and Gamma-Ray Telescopes and Instruments for Astronomy - Waikoloa, HI, United States Duration: Aug 24 2002 → Aug 28 2002

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Computer Science Applications
Applied Mathematics
Electrical and Electronic Engineering

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10.1117/12.461495

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title = "An algorithm for locating PSF-Like events and computing the centroid in X-ray images",

abstract = "The Swift X-ray Telescope (XRT)[1] is designed to make astrometric, spectroscopic, and photometric observations of X-ray emission from Gamma-ray Bursts and their afterglows in the energy band 0.2-10 keV. The XRT has a variety of readout modes which it automatically selects in order to observe objects covering 7 orders of magnitude in flux and to extract the maximum possible science from each one, in response to the flux from the burst diminishing. The primary goal of the XRT is to locate the position of the Gamma-Ray Burst to 1 arcsec and to transmit this position to the UVOT and the ground within 100 seconds of the initial observation of the burst. We describe in detail the use of imaging mode and a centroid algorithm to determine the position of the Gamma-Ray Burst with sub-pixel accuracy.",

author = "Hill, {Joanne E.} and Chaitanya Cheruvu and Abbey, {Tony F.} and Ambrosi, {Richard M.} and Burrows, {David N.} and Short, {Alexander D.T.} and Alan Wells and Nousek, {John A.}",

year = "2002",

doi = "10.1117/12.461495",

language = "English (US)",

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pages = "1347--1355",

journal = "Proceedings of SPIE - The International Society for Optical Engineering",

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note = "X-Ray and Gamma-Ray Telescopes and Instruments for Astronomy ; Conference date: 24-08-2002 Through 28-08-2002",

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T1 - An algorithm for locating PSF-Like events and computing the centroid in X-ray images

AU - Hill, Joanne E.

AU - Cheruvu, Chaitanya

AU - Abbey, Tony F.

AU - Ambrosi, Richard M.

AU - Burrows, David N.

AU - Short, Alexander D.T.

AU - Wells, Alan

AU - Nousek, John A.

PY - 2002

Y1 - 2002

N2 - The Swift X-ray Telescope (XRT)[1] is designed to make astrometric, spectroscopic, and photometric observations of X-ray emission from Gamma-ray Bursts and their afterglows in the energy band 0.2-10 keV. The XRT has a variety of readout modes which it automatically selects in order to observe objects covering 7 orders of magnitude in flux and to extract the maximum possible science from each one, in response to the flux from the burst diminishing. The primary goal of the XRT is to locate the position of the Gamma-Ray Burst to 1 arcsec and to transmit this position to the UVOT and the ground within 100 seconds of the initial observation of the burst. We describe in detail the use of imaging mode and a centroid algorithm to determine the position of the Gamma-Ray Burst with sub-pixel accuracy.

AB - The Swift X-ray Telescope (XRT)[1] is designed to make astrometric, spectroscopic, and photometric observations of X-ray emission from Gamma-ray Bursts and their afterglows in the energy band 0.2-10 keV. The XRT has a variety of readout modes which it automatically selects in order to observe objects covering 7 orders of magnitude in flux and to extract the maximum possible science from each one, in response to the flux from the burst diminishing. The primary goal of the XRT is to locate the position of the Gamma-Ray Burst to 1 arcsec and to transmit this position to the UVOT and the ground within 100 seconds of the initial observation of the burst. We describe in detail the use of imaging mode and a centroid algorithm to determine the position of the Gamma-Ray Burst with sub-pixel accuracy.

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JF - Proceedings of SPIE - The International Society for Optical Engineering

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Y2 - 24 August 2002 through 28 August 2002

ER -

An algorithm for locating PSF-Like events and computing the centroid in X-ray images

Abstract

All Science Journal Classification (ASJC) codes

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