Type-I X-ray bursts from XTE J1739-285

S. Brandt; E. Kuulkers; A. Bazzano; T.J.-L. Courvoisier; A. Domingo; K. Ebisawa; N. Gehrels; P. Kretschmar; R. Krivonos; R. Lund; C. Markwardt; N. Mowlavi; T. Oosterbroek; A. Orr; A. Paizis; J.-P. Roques; S.E. Shaw; R. Wijnands

Type-I X-ray bursts from XTE J1739-285

S. Brandt, E. Kuulkers^*, A. Bazzano, T.J.-L. Courvoisier, A. Domingo, K. Ebisawa, N. Gehrels, P. Kretschmar, R. Krivonos, R. Lund, C. Markwardt, N. Mowlavi, T. Oosterbroek, A. Orr, A. Paizis, J.-P. Roques, S.E. Shaw, R. Wijnands

^*Corresponding author for this work

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

Abstract

During the Galactic Bulge Monitoring and Galactic Centre Scan observations performed with INTEGRAL, two X-ray flares coming from XTE J1739-285 were observed with the X-ray monitor JEM-X (3-25 keV). The events started on UT Sep 30, 2005 11:51:21 and UT Oct 04 2005 17:49:41, respectively, and reached a net-peak flux of ~500 mCrab. The flares had a rise-time of 2-3 seconds, followed by an exponential-like decay with an e-folding time of 10-15 seconds in the 3-25 keV band. The duration of the events are shorter at higher X-ray energies, indicating softening of the X-ray spectrum during the decay. These characteristics are typical of type-I X-ray bursts. The observations strongly suggest that XTE J1739-285 harbors a neutron star, and not a black hole as previously suggested based on the spectral evolution of the source (ATel #615).

Original language	English
Publication date	8 Oct 2005
Publication status	Published - 8 Oct 2005

Series	The Astronomer's telegram
Number	ATel #622

Keywords

X-ray
Binary
Black hole
Neutron star
Transient

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Brandt, S., Kuulkers, E., Bazzano, A., Courvoisier, TJ.-L., Domingo, A., Ebisawa, K., Gehrels, N., Kretschmar, P., Krivonos, R., Lund, R., Markwardt, C., Mowlavi, N., Oosterbroek, T., Orr, A., Paizis, A., Roques, J.-P., Shaw, S. E., & Wijnands, R. (2005, Oct 8). Type-I X-ray bursts from XTE J1739-285. The Astronomer's telegram No. ATel #622 http://www.astronomerstelegram.org/?read=622

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title = "Type-I X-ray bursts from XTE J1739-285",

abstract = "During the Galactic Bulge Monitoring and Galactic Centre Scan observations performed with INTEGRAL, two X-ray flares coming from XTE J1739-285 were observed with the X-ray monitor JEM-X (3-25 keV). The events started on UT Sep 30, 2005 11:51:21 and UT Oct 04 2005 17:49:41, respectively, and reached a net-peak flux of ~500 mCrab. The flares had a rise-time of 2-3 seconds, followed by an exponential-like decay with an e-folding time of 10-15 seconds in the 3-25 keV band. The duration of the events are shorter at higher X-ray energies, indicating softening of the X-ray spectrum during the decay. These characteristics are typical of type-I X-ray bursts. The observations strongly suggest that XTE J1739-285 harbors a neutron star, and not a black hole as previously suggested based on the spectral evolution of the source (ATel #615). ",

keywords = "X-ray, Binary, Black hole, Neutron star, Transient",

author = "S. Brandt and E. Kuulkers and A. Bazzano and T.J.-L. Courvoisier and A. Domingo and K. Ebisawa and N. Gehrels and P. Kretschmar and R. Krivonos and R. Lund and C. Markwardt and N. Mowlavi and T. Oosterbroek and A. Orr and A. Paizis and J.-P. Roques and S.E. Shaw and R. Wijnands",

year = "2005",

month = oct,

day = "8",

language = "English",

series = "The Astronomer's telegram",

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T1 - Type-I X-ray bursts from XTE J1739-285

AU - Brandt, S.

AU - Kuulkers, E.

AU - Bazzano, A.

AU - Courvoisier, T.J.-L.

AU - Domingo, A.

AU - Ebisawa, K.

AU - Gehrels, N.

AU - Kretschmar, P.

AU - Krivonos, R.

AU - Lund, R.

AU - Markwardt, C.

AU - Mowlavi, N.

AU - Oosterbroek, T.

AU - Orr, A.

AU - Paizis, A.

AU - Roques, J.-P.

AU - Shaw, S.E.

AU - Wijnands, R.

PY - 2005/10/8

Y1 - 2005/10/8

N2 - During the Galactic Bulge Monitoring and Galactic Centre Scan observations performed with INTEGRAL, two X-ray flares coming from XTE J1739-285 were observed with the X-ray monitor JEM-X (3-25 keV). The events started on UT Sep 30, 2005 11:51:21 and UT Oct 04 2005 17:49:41, respectively, and reached a net-peak flux of ~500 mCrab. The flares had a rise-time of 2-3 seconds, followed by an exponential-like decay with an e-folding time of 10-15 seconds in the 3-25 keV band. The duration of the events are shorter at higher X-ray energies, indicating softening of the X-ray spectrum during the decay. These characteristics are typical of type-I X-ray bursts. The observations strongly suggest that XTE J1739-285 harbors a neutron star, and not a black hole as previously suggested based on the spectral evolution of the source (ATel #615).

AB - During the Galactic Bulge Monitoring and Galactic Centre Scan observations performed with INTEGRAL, two X-ray flares coming from XTE J1739-285 were observed with the X-ray monitor JEM-X (3-25 keV). The events started on UT Sep 30, 2005 11:51:21 and UT Oct 04 2005 17:49:41, respectively, and reached a net-peak flux of ~500 mCrab. The flares had a rise-time of 2-3 seconds, followed by an exponential-like decay with an e-folding time of 10-15 seconds in the 3-25 keV band. The duration of the events are shorter at higher X-ray energies, indicating softening of the X-ray spectrum during the decay. These characteristics are typical of type-I X-ray bursts. The observations strongly suggest that XTE J1739-285 harbors a neutron star, and not a black hole as previously suggested based on the spectral evolution of the source (ATel #615).

KW - X-ray

KW - Binary

KW - Black hole

KW - Neutron star

KW - Transient

M3 - Net publication - Internet publication

T3 - The Astronomer's telegram

ER -

Type-I X-ray bursts from XTE J1739-285

Abstract

Keywords

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