Swift follow-up of the renewed activity of IGR J19294+1816

L.  Sidoli; S. P. Drave; M. Fiocchi; A. Bazzano; V. Sguera; J. Chenevez; A. J. Bird; E. Kuulkers; L. Natalucci; A. Tarana

Swift follow-up of the renewed activity of IGR J19294+1816

L. Sidoli^*
, S. P. Drave
, M. Fiocchi
, A. Bazzano
, V. Sguera
, J. Chenevez
, A. J. Bird
, E. Kuulkers
, L. Natalucci
, A. Tarana

^*Corresponding author for this work

National Institute for Astrophysics
University of Southampton
European Space Astronomy Centre

Research output: Other contribution › Net publication - Internet publication › Research

Abstract

Following the renewed activity of the X-ray transient pulsar IGRJ19294+1816 observed by INTEGRAL (ATel #4135), Swift pointed at the source position for about 2 ks starting on 2012 May 28 at 17:45:15 UT. The source displayed a net count rate of 0.18 +/- 0.01 c/s (2-10 keV, XRT PC data).

The XRT spectrum (PC data, net exposure time of 1968 s) is well described by an absorbed power law model, resulting in a photon index of 1.25 (+0.77,-0.68), and in an absorption of NH= 8 (+/-4) E+22 cm-2 (chi2_red=0.600 for 11 dof). The source fluxes are 3E-11 erg/cm2/s (1-10 keV, observed) and 5E-11 erg/cm2/s (1-10 keV, unabsorbed), indicating a declining phase with respect to the INTEGRAL observation. A black body model results in an equally good fit to the data, with NH= 4 (+/-3) E+22 cm-2 and a temperature of 2.0 (+0.7,-0.4) keV (chi2_red=0.633 for 11 dof).

A timing analysis on the barycentered events clearly shows X-ray pulsations with a period of P=12.457 +/- 0.006 s and a pulse fraction of about 60%.

We would like to thank the Swift Team for making these observations possible.

Original language	English
Publication date	30 May 2012
Publication status	Published - 30 May 2012

Series	The Astronomer's telegram
Number	ATel #4136

Keywords

X-ray
Gamma ray
Binary
Neutron star
Transient
Pulsar

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@misc{8d64316b20964750837393fe34926c73,

title = "Swift follow-up of the renewed activity of IGR J19294+1816",

abstract = "Following the renewed activity of the X-ray transient pulsar IGRJ19294+1816 observed by INTEGRAL (ATel \#4135), Swift pointed at the source position for about 2 ks starting on 2012 May 28 at 17:45:15 UT. The source displayed a net count rate of 0.18 +/- 0.01 c/s (2-10 keV, XRT PC data). The XRT spectrum (PC data, net exposure time of 1968 s) is well described by an absorbed power law model, resulting in a photon index of 1.25 (+0.77,-0.68), and in an absorption of NH= 8 (+/-4) E+22 cm-2 (chi2\_red=0.600 for 11 dof). The source fluxes are 3E-11 erg/cm2/s (1-10 keV, observed) and 5E-11 erg/cm2/s (1-10 keV, unabsorbed), indicating a declining phase with respect to the INTEGRAL observation. A black body model results in an equally good fit to the data, with NH= 4 (+/-3) E+22 cm-2 and a temperature of 2.0 (+0.7,-0.4) keV (chi2\_red=0.633 for 11 dof). A timing analysis on the barycentered events clearly shows X-ray pulsations with a period of P=12.457 +/- 0.006 s and a pulse fraction of about 60\%. We would like to thank the Swift Team for making these observations possible. ",

keywords = "X-ray, Gamma ray, Binary, Neutron star, Transient, Pulsar",

author = "L. Sidoli and Drave, \{S. P.\} and M. Fiocchi and A. Bazzano and V. Sguera and J. Chenevez and Bird, \{A. J.\} and E. Kuulkers and L. Natalucci and A. Tarana",

year = "2012",

month = may,

day = "30",

language = "English",

series = "The Astronomer's telegram",

publisher = "R. Rutledge",

number = "ATel \#4136",

type = "Other",

}

TY - ICOMM

T1 - Swift follow-up of the renewed activity of IGR J19294+1816

AU - Sidoli, L.

AU - Drave, S. P.

AU - Fiocchi, M.

AU - Bazzano, A.

AU - Sguera, V.

AU - Chenevez, J.

AU - Bird, A. J.

AU - Kuulkers, E.

AU - Natalucci, L.

AU - Tarana, A.

PY - 2012/5/30

Y1 - 2012/5/30

N2 - Following the renewed activity of the X-ray transient pulsar IGRJ19294+1816 observed by INTEGRAL (ATel #4135), Swift pointed at the source position for about 2 ks starting on 2012 May 28 at 17:45:15 UT. The source displayed a net count rate of 0.18 +/- 0.01 c/s (2-10 keV, XRT PC data). The XRT spectrum (PC data, net exposure time of 1968 s) is well described by an absorbed power law model, resulting in a photon index of 1.25 (+0.77,-0.68), and in an absorption of NH= 8 (+/-4) E+22 cm-2 (chi2_red=0.600 for 11 dof). The source fluxes are 3E-11 erg/cm2/s (1-10 keV, observed) and 5E-11 erg/cm2/s (1-10 keV, unabsorbed), indicating a declining phase with respect to the INTEGRAL observation. A black body model results in an equally good fit to the data, with NH= 4 (+/-3) E+22 cm-2 and a temperature of 2.0 (+0.7,-0.4) keV (chi2_red=0.633 for 11 dof). A timing analysis on the barycentered events clearly shows X-ray pulsations with a period of P=12.457 +/- 0.006 s and a pulse fraction of about 60%. We would like to thank the Swift Team for making these observations possible.

AB - Following the renewed activity of the X-ray transient pulsar IGRJ19294+1816 observed by INTEGRAL (ATel #4135), Swift pointed at the source position for about 2 ks starting on 2012 May 28 at 17:45:15 UT. The source displayed a net count rate of 0.18 +/- 0.01 c/s (2-10 keV, XRT PC data). The XRT spectrum (PC data, net exposure time of 1968 s) is well described by an absorbed power law model, resulting in a photon index of 1.25 (+0.77,-0.68), and in an absorption of NH= 8 (+/-4) E+22 cm-2 (chi2_red=0.600 for 11 dof). The source fluxes are 3E-11 erg/cm2/s (1-10 keV, observed) and 5E-11 erg/cm2/s (1-10 keV, unabsorbed), indicating a declining phase with respect to the INTEGRAL observation. A black body model results in an equally good fit to the data, with NH= 4 (+/-3) E+22 cm-2 and a temperature of 2.0 (+0.7,-0.4) keV (chi2_red=0.633 for 11 dof). A timing analysis on the barycentered events clearly shows X-ray pulsations with a period of P=12.457 +/- 0.006 s and a pulse fraction of about 60%. We would like to thank the Swift Team for making these observations possible.

KW - X-ray

KW - Gamma ray

KW - Binary

KW - Neutron star

KW - Transient

KW - Pulsar

M3 - Net publication - Internet publication

T3 - The Astronomer's telegram

ER -

Swift follow-up of the renewed activity of IGR J19294+1816

Abstract

Keywords

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