INTEGRAL observation of GRS 1739-278 in outburst

E. Filippova; E. Kuulkers; J. Alfonso-Garzon; V. Beckmann; A. J. Bird; S. Brandt; J. Chenevez; M. Del Santo; A. Domingo; K. Ebisawa; P. G. Jonker; P. Kretschmar; C. B. Markwardt; T. Oosterbroek; A. Paizis; K. Pottschmidt; C. Sanchez-Fernandez; R. Wijnands; Enrico Bozzo; C. Ferrigno

INTEGRAL observation of GRS 1739-278 in outburst

E. Filippova^*
, E. Kuulkers
, J. Alfonso-Garzon
, V. Beckmann
, A. J. Bird
, S. Brandt
, J. Chenevez
, M. Del Santo
, A. Domingo
, K. Ebisawa
, P. G. Jonker
, P. Kretschmar
, C. B. Markwardt
, T. Oosterbroek
, A. Paizis
, K. Pottschmidt
, C. Sanchez-Fernandez
, R. Wijnands
, Enrico Bozzo
, C. Ferrigno

^*Corresponding author for this work

University of Maryland, Baltimore County
University of Geneva
European Space Astronomy Centre
CSIC
A.P.C.
University of Southampton
National Institute for Astrophysics
The University of Tokyo
SRON Netherlands Institute for Space Research
NASA Goddard Space Flight Center
European Space Agency - ESA
University of Amsterdam

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

Abstract

During the Galactic bulge monitoring observation (Atel #438) performed on 2014 March 19 from 11.00 to 14:42 (UTC), the black-hole candidate GRS 1739-278 (ATel #5986) was also seen by INTEGRAL.

The source is detected by IBIS/ISGRI up to an energy of about 200 keV. The estimated ISGRI flux is 143+/-2 mCrab in the 18-40 keV energy band and 166+/-2 mCrab in the 40-100 keV energy band. The fluxes estimated from JEM-X are 60+/-4 mCrab in the 3-10 keV energy band and 104+/-8 mCrab in the 10-20 keV energy band.

Its averaged broad-band (3-200 keV) spectrum, extracted by using all available ISGRI and JEM-X data (total exposure time 12.6 ks), could be roughly described with a cut-off power-law model. The measured photon index is 1.4+/-0.2 and the energy cut-off is 90(-20+40) keV (we fixed the absorption column density to the Galactic value expected in the direction of the source, i.e. 0.8E22 cm^-2). The 3-200 keV X-ray flux derived from the spectral fit is 5E-9 ergs/cm^2/s (not corrected for absorption).

This spectral shape is reminiscent of that displayed by black-hole candidates in the canonical hard state.

Further observations of the source with INTEGRAL are planned for March 28.

Original language	English
Publication date	20 Mar 2014
Publication status	Published - 20 Mar 2014

Series	The Astronomer's telegram
Number	ATel #5991

Keywords

X-ray
Black hole
Transient

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Filippova, E., Kuulkers, E., Alfonso-Garzon, J., Beckmann, V., Bird, A. J., Brandt, S., Chenevez, J., Del Santo, M., Domingo, A., Ebisawa, K., Jonker, P. G., Kretschmar, P., Markwardt, C. B., Oosterbroek, T., Paizis, A., Pottschmidt, K., Sanchez-Fernandez, C., Wijnands, R., Bozzo, E., & Ferrigno, C. (2014, Mar 20). INTEGRAL observation of GRS 1739-278 in outburst. The Astronomer's telegram No. ATel #5991 http://www.astronomerstelegram.org/?read=5991

@misc{db02b72858834a548bfb18b9b19a014e,

title = "INTEGRAL observation of GRS 1739-278 in outburst",

abstract = "During the Galactic bulge monitoring observation (Atel \#438) performed on 2014 March 19 from 11.00 to 14:42 (UTC), the black-hole candidate GRS 1739-278 (ATel \#5986) was also seen by INTEGRAL. The source is detected by IBIS/ISGRI up to an energy of about 200 keV. The estimated ISGRI flux is 143+/-2 mCrab in the 18-40 keV energy band and 166+/-2 mCrab in the 40-100 keV energy band. The fluxes estimated from JEM-X are 60+/-4 mCrab in the 3-10 keV energy band and 104+/-8 mCrab in the 10-20 keV energy band. Its averaged broad-band (3-200 keV) spectrum, extracted by using all available ISGRI and JEM-X data (total exposure time 12.6 ks), could be roughly described with a cut-off power-law model. The measured photon index is 1.4+/-0.2 and the energy cut-off is 90(-20+40) keV (we fixed the absorption column density to the Galactic value expected in the direction of the source, i.e. 0.8E22 cm\textasciicircum{}-2). The 3-200 keV X-ray flux derived from the spectral fit is 5E-9 ergs/cm\textasciicircum{}2/s (not corrected for absorption). This spectral shape is reminiscent of that displayed by black-hole candidates in the canonical hard state. Further observations of the source with INTEGRAL are planned for March 28.",

keywords = "X-ray, Black hole , Transient",

author = "E. Filippova and E. Kuulkers and J. Alfonso-Garzon and V. Beckmann and Bird, \{A. J.\} and S. Brandt and J. Chenevez and \{Del Santo\}, M. and A. Domingo and K. Ebisawa and Jonker, \{P. G.\} and P. Kretschmar and Markwardt, \{C. B.\} and T. Oosterbroek and A. Paizis and K. Pottschmidt and C. Sanchez-Fernandez and R. Wijnands and Enrico Bozzo and C. Ferrigno",

year = "2014",

month = mar,

day = "20",

language = "English",

series = "The Astronomer's telegram",

publisher = "R. Rutledge",

number = "ATel \#5991",

type = "Other",

}

Filippova, E, Kuulkers, E, Alfonso-Garzon, J, Beckmann, V, Bird, AJ, Brandt, S , Chenevez, J, Del Santo, M, Domingo, A, Ebisawa, K, Jonker, PG, Kretschmar, P, Markwardt, CB, Oosterbroek, T, Paizis, A, Pottschmidt, K, Sanchez-Fernandez, C, Wijnands, R, Bozzo, E & Ferrigno, C 2014, INTEGRAL observation of GRS 1739-278 in outburst. <http://www.astronomerstelegram.org/?read=5991>

TY - ICOMM

T1 - INTEGRAL observation of GRS 1739-278 in outburst

AU - Filippova, E.

AU - Kuulkers, E.

AU - Alfonso-Garzon, J.

AU - Beckmann, V.

AU - Bird, A. J.

AU - Brandt, S.

AU - Chenevez, J.

AU - Del Santo, M.

AU - Domingo, A.

AU - Ebisawa, K.

AU - Jonker, P. G.

AU - Kretschmar, P.

AU - Markwardt, C. B.

AU - Oosterbroek, T.

AU - Paizis, A.

AU - Pottschmidt, K.

AU - Sanchez-Fernandez, C.

AU - Wijnands, R.

AU - Bozzo, Enrico

AU - Ferrigno, C.

PY - 2014/3/20

Y1 - 2014/3/20

N2 - During the Galactic bulge monitoring observation (Atel #438) performed on 2014 March 19 from 11.00 to 14:42 (UTC), the black-hole candidate GRS 1739-278 (ATel #5986) was also seen by INTEGRAL. The source is detected by IBIS/ISGRI up to an energy of about 200 keV. The estimated ISGRI flux is 143+/-2 mCrab in the 18-40 keV energy band and 166+/-2 mCrab in the 40-100 keV energy band. The fluxes estimated from JEM-X are 60+/-4 mCrab in the 3-10 keV energy band and 104+/-8 mCrab in the 10-20 keV energy band. Its averaged broad-band (3-200 keV) spectrum, extracted by using all available ISGRI and JEM-X data (total exposure time 12.6 ks), could be roughly described with a cut-off power-law model. The measured photon index is 1.4+/-0.2 and the energy cut-off is 90(-20+40) keV (we fixed the absorption column density to the Galactic value expected in the direction of the source, i.e. 0.8E22 cm^-2). The 3-200 keV X-ray flux derived from the spectral fit is 5E-9 ergs/cm^2/s (not corrected for absorption). This spectral shape is reminiscent of that displayed by black-hole candidates in the canonical hard state. Further observations of the source with INTEGRAL are planned for March 28.

AB - During the Galactic bulge monitoring observation (Atel #438) performed on 2014 March 19 from 11.00 to 14:42 (UTC), the black-hole candidate GRS 1739-278 (ATel #5986) was also seen by INTEGRAL. The source is detected by IBIS/ISGRI up to an energy of about 200 keV. The estimated ISGRI flux is 143+/-2 mCrab in the 18-40 keV energy band and 166+/-2 mCrab in the 40-100 keV energy band. The fluxes estimated from JEM-X are 60+/-4 mCrab in the 3-10 keV energy band and 104+/-8 mCrab in the 10-20 keV energy band. Its averaged broad-band (3-200 keV) spectrum, extracted by using all available ISGRI and JEM-X data (total exposure time 12.6 ks), could be roughly described with a cut-off power-law model. The measured photon index is 1.4+/-0.2 and the energy cut-off is 90(-20+40) keV (we fixed the absorption column density to the Galactic value expected in the direction of the source, i.e. 0.8E22 cm^-2). The 3-200 keV X-ray flux derived from the spectral fit is 5E-9 ergs/cm^2/s (not corrected for absorption). This spectral shape is reminiscent of that displayed by black-hole candidates in the canonical hard state. Further observations of the source with INTEGRAL are planned for March 28.

KW - X-ray

KW - Black hole

KW - Transient

M3 - Net publication - Internet publication

T3 - The Astronomer's telegram

ER -

INTEGRAL observation of GRS 1739-278 in outburst

Abstract

Keywords

Access to Document

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