Pile-up correction for the Swift-XRT observations in WT mode

T. Mineo; P. Romano; V. Mangano; A. Moretti; G. Cusumano; V. La Parola; E. Troja; S. Campana; G. Chincarini; G. Tagliaferri; M. Capalbi; M. Perri; P. Giommi; D. Burrows

doi:10.1393/ncb/i2007-10296-7

Pile-up correction for the Swift-XRT observations in WT mode

T. Mineo, P. Romano, V. Mangano, A. Moretti, G. Cusumano, V. La Parola, E. Troja, S. Campana, G. Chincarini, G. Tagliaferri, M. Capalbi, M. Perri, P. Giommi, D. Burrows

Astronomy & Astrophysics

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4 Scopus citations

Abstract

The detector at the focal plane of the Swift X-ray Telescope (XRT) supports four readout modes, automatically changed on board, to cover the dynamical range of fluxes and rapid variability expected from GRB afterglows. The Windowed Timing (WT) mode is used for sources with flux higher than a few mCrab and is obtained by compressing 10 rows into a single row, and then reading out only the central 200 columns of the CCD. Point sources with a rate above ∼300 c s^-1 produce severe pile-up in the central region of the point spread function. This paper presents three methods to correct the effects of the pile-up in WT mode. On-ground calibration results and data from the very bright GRB 060124 are used to define and test these methods.

Original language	English (US)
Pages (from-to)	1521-1522
Number of pages	2
Journal	Nuovo Cimento della Societa Italiana di Fisica B
Volume	121
Issue number	12
DOIs	https://doi.org/10.1393/ncb/i2007-10296-7
State	Published - Dec 2006

All Science Journal Classification (ASJC) codes

General Physics and Astronomy

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10.1393/ncb/i2007-10296-7

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title = "Pile-up correction for the Swift-XRT observations in WT mode",

abstract = "The detector at the focal plane of the Swift X-ray Telescope (XRT) supports four readout modes, automatically changed on board, to cover the dynamical range of fluxes and rapid variability expected from GRB afterglows. The Windowed Timing (WT) mode is used for sources with flux higher than a few mCrab and is obtained by compressing 10 rows into a single row, and then reading out only the central 200 columns of the CCD. Point sources with a rate above ∼300 c s-1 produce severe pile-up in the central region of the point spread function. This paper presents three methods to correct the effects of the pile-up in WT mode. On-ground calibration results and data from the very bright GRB 060124 are used to define and test these methods.",

author = "T. Mineo and P. Romano and V. Mangano and A. Moretti and G. Cusumano and {La Parola}, V. and E. Troja and S. Campana and G. Chincarini and G. Tagliaferri and M. Capalbi and M. Perri and P. Giommi and D. Burrows",

year = "2006",

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doi = "10.1393/ncb/i2007-10296-7",

language = "English (US)",

volume = "121",

pages = "1521--1522",

journal = "Nuovo Cimento della Societa Italiana di Fisica B",

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TY - JOUR

T1 - Pile-up correction for the Swift-XRT observations in WT mode

AU - Mineo, T.

AU - Romano, P.

AU - Mangano, V.

AU - Moretti, A.

AU - Cusumano, G.

AU - La Parola, V.

AU - Troja, E.

AU - Campana, S.

AU - Chincarini, G.

AU - Tagliaferri, G.

AU - Capalbi, M.

AU - Perri, M.

AU - Giommi, P.

AU - Burrows, D.

PY - 2006/12

Y1 - 2006/12

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AB - The detector at the focal plane of the Swift X-ray Telescope (XRT) supports four readout modes, automatically changed on board, to cover the dynamical range of fluxes and rapid variability expected from GRB afterglows. The Windowed Timing (WT) mode is used for sources with flux higher than a few mCrab and is obtained by compressing 10 rows into a single row, and then reading out only the central 200 columns of the CCD. Point sources with a rate above ∼300 c s-1 produce severe pile-up in the central region of the point spread function. This paper presents three methods to correct the effects of the pile-up in WT mode. On-ground calibration results and data from the very bright GRB 060124 are used to define and test these methods.

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JO - Nuovo Cimento della Societa Italiana di Fisica B

JF - Nuovo Cimento della Societa Italiana di Fisica B

IS - 12

ER -

Pile-up correction for the Swift-XRT observations in WT mode

Abstract

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