INTEGRAL Bulge monitoring program detects several active transients with JEM-X

J. Chenevez; E. Kuulkers; J. Alfonso-GarzÃ³n; V. Beckmann; T. Bird; S. Brandt; M. Del Santo; A. Domingo; K. Ebisawa; P. Jonker; P. Kretschmar; C. Markwardt; T. Oosterbroek; A. Paizis; K. Pottschmidt; C. SÃ¡nchez-FernÃ¡ndez; R. Eijnands

INTEGRAL Bulge monitoring program detects several active transients with JEM-X

J. Chenevez^*, E. Kuulkers, J. Alfonso-GarzÃ³n, V. Beckmann, T. Bird, S. Brandt, M. Del Santo, A. Domingo, K. Ebisawa, P. Jonker, P. Kretschmar, C. Markwardt, T. Oosterbroek, A. Paizis , K. Pottschmidt, C. SÃ¡nchez-FernÃ¡ndez , R. Eijnands

^*Corresponding author for this work

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

Abstract

A new season of the INTEGRAL Galactic bulge monitoring program (see ATel #438) has begun with an observation of seven pointings obtained between 2012 Feb 14.375 (9 UT) and 14.528 (12:41 UT), and reveals several transient X-ray sources detected by the twin JEM-X instruments. For temporary technical reasons the IBIS instrument was not taking data during these pointings.

We find the low-mass X-ray binary SAX J1747.0-2853 at a flux of 245 +/-65 mCrab between 3-10 keV with a detection significance of 4 sigma for a total effective exposure of 14.9 ksec. The source is not detected in the 10-25 keV band with an upper limit of 5 mCrab. The last outburst of this transient source was observed a year ago, lasting from end of January until at least end of March 2011 (see, e.g., ATels #3123, #3172, #3183, #3217).

The black hole candidate and microquasar H1743-322 (also known as IGR J17464-3213), observed during a total effective exposure of 7.5 ksec, is measured at a flux of 350 +/- 100 mCrab with a detection significance of 3.5 sigma between 3-10 keV, and 53 +/-25 mCrab at 2.5 sigma between 10-25 keV. The source was observed by INTEGRAL at the beginning of an outburst in April 2011 (ATels #3263, 3267), and renewed activity was reported by MAXI at the end of 2011 (ATel #3842).

The X-ray burster KS 1741-293 (AX J1744.8-2921) is clearly active at a measured flux of 415 +/- 75 mCrab between 3-10 keV for a detection significance of 5.5 sigma and effective exposure of 15 ksec, and 80 +/- 10 mCrab at 9 sigma between 10-25 keV. A short (15 sec) X-ray burst is detected with a 3-25 keV peak flux of 0.6 Crab at UT 10:46:39 on February 14th.

INTEGRAL will continue to monitor the Galactic bulge about every third day until mid April, and observation results from near real time data will be made available at: http://integral.esac.esa.int/BULGE/index.html

Original language	English
Publication date	16 Feb 2012
Publication status	Published - 16 Feb 2012

Series	The Astronomer's telegram
Number	ATel #3930

Keywords

X-ray
Black hole
Neutron star
Transient

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INTEGRAL Galactic Bulge Monitoring Program
Brandt, S. (Project Participant), Chenevez, J. (Project Participant) & Kuulkers, E. (Project Coordinator)
01/02/2005 → …
Project: Research

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Chenevez, J., Kuulkers, E., Alfonso-GarzÃ³n, J., Beckmann, V., Bird, T., Brandt, S., Del Santo, M., Domingo, A., Ebisawa, K., Jonker, P., Kretschmar, P., Markwardt, C., Oosterbroek, T., Paizis , A., Pottschmidt, K., SÃ¡nchez-FernÃ¡ndez , C., & Eijnands, R. (2012, Feb 16). INTEGRAL Bulge monitoring program detects several active transients with JEM-X. The Astronomer's telegram No. ATel #3930 http://www.astronomerstelegram.org/?read=3930

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title = "INTEGRAL Bulge monitoring program detects several active transients with JEM-X",

abstract = "A new season of the INTEGRAL Galactic bulge monitoring program (see ATel #438) has begun with an observation of seven pointings obtained between 2012 Feb 14.375 (9 UT) and 14.528 (12:41 UT), and reveals several transient X-ray sources detected by the twin JEM-X instruments. For temporary technical reasons the IBIS instrument was not taking data during these pointings.We find the low-mass X-ray binary SAX J1747.0-2853 at a flux of 245 +/-65 mCrab between 3-10 keV with a detection significance of 4 sigma for a total effective exposure of 14.9 ksec. The source is not detected in the 10-25 keV band with an upper limit of 5 mCrab. The last outburst of this transient source was observed a year ago, lasting from end of January until at least end of March 2011 (see, e.g., ATels #3123, #3172, #3183, #3217).The black hole candidate and microquasar H1743-322 (also known as IGR J17464-3213), observed during a total effective exposure of 7.5 ksec, is measured at a flux of 350 +/- 100 mCrab with a detection significance of 3.5 sigma between 3-10 keV, and 53 +/-25 mCrab at 2.5 sigma between 10-25 keV. The source was observed by INTEGRAL at the beginning of an outburst in April 2011 (ATels #3263, 3267), and renewed activity was reported by MAXI at the end of 2011 (ATel #3842).The X-ray burster KS 1741-293 (AX J1744.8-2921) is clearly active at a measured flux of 415 +/- 75 mCrab between 3-10 keV for a detection significance of 5.5 sigma and effective exposure of 15 ksec, and 80 +/- 10 mCrab at 9 sigma between 10-25 keV. A short (15 sec) X-ray burst is detected with a 3-25 keV peak flux of 0.6 Crab at UT 10:46:39 on February 14th.INTEGRAL will continue to monitor the Galactic bulge about every third day until mid April, and observation results from near real time data will be made available at: http://integral.esac.esa.int/BULGE/index.html ",

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

author = "J. Chenevez and E. Kuulkers and J. Alfonso-Garz{\~A}³n and V. Beckmann and T. Bird and S. Brandt and {Del Santo}, M. and A. Domingo and K. Ebisawa and P. Jonker and P. Kretschmar and C. Markwardt and T. Oosterbroek and A. Paizis and K. Pottschmidt and C. S{\~A}¡nchez-Fern{\~A}¡ndez and R. Eijnands",

year = "2012",

month = feb,

day = "16",

language = "English",

series = "The Astronomer's telegram",

publisher = "R. Rutledge",

number = "ATel #3930",

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Chenevez, J, Kuulkers, E, Alfonso-GarzÃ³n, J, Beckmann, V, Bird, T, Brandt, S, Del Santo, M, Domingo, A, Ebisawa, K, Jonker, P, Kretschmar, P, Markwardt, C, Oosterbroek, T, Paizis , A, Pottschmidt, K, SÃ¡nchez-FernÃ¡ndez , C & Eijnands, R 2012, INTEGRAL Bulge monitoring program detects several active transients with JEM-X.. <http://www.astronomerstelegram.org/?read=3930>

TY - ICOMM

T1 - INTEGRAL Bulge monitoring program detects several active transients with JEM-X

AU - Chenevez, J.

AU - Kuulkers, E.

AU - Alfonso-GarzÃ³n, J.

AU - Beckmann, V.

AU - Bird, T.

AU - Brandt, S.

AU - Del Santo, M.

AU - Domingo, A.

AU - Ebisawa, K.

AU - Jonker, P.

AU - Kretschmar, P.

AU - Markwardt, C.

AU - Oosterbroek, T.

AU - Paizis , A.

AU - Pottschmidt, K.

AU - SÃ¡nchez-FernÃ¡ndez , C.

AU - Eijnands, R.

PY - 2012/2/16

Y1 - 2012/2/16

N2 - A new season of the INTEGRAL Galactic bulge monitoring program (see ATel #438) has begun with an observation of seven pointings obtained between 2012 Feb 14.375 (9 UT) and 14.528 (12:41 UT), and reveals several transient X-ray sources detected by the twin JEM-X instruments. For temporary technical reasons the IBIS instrument was not taking data during these pointings.We find the low-mass X-ray binary SAX J1747.0-2853 at a flux of 245 +/-65 mCrab between 3-10 keV with a detection significance of 4 sigma for a total effective exposure of 14.9 ksec. The source is not detected in the 10-25 keV band with an upper limit of 5 mCrab. The last outburst of this transient source was observed a year ago, lasting from end of January until at least end of March 2011 (see, e.g., ATels #3123, #3172, #3183, #3217).The black hole candidate and microquasar H1743-322 (also known as IGR J17464-3213), observed during a total effective exposure of 7.5 ksec, is measured at a flux of 350 +/- 100 mCrab with a detection significance of 3.5 sigma between 3-10 keV, and 53 +/-25 mCrab at 2.5 sigma between 10-25 keV. The source was observed by INTEGRAL at the beginning of an outburst in April 2011 (ATels #3263, 3267), and renewed activity was reported by MAXI at the end of 2011 (ATel #3842).The X-ray burster KS 1741-293 (AX J1744.8-2921) is clearly active at a measured flux of 415 +/- 75 mCrab between 3-10 keV for a detection significance of 5.5 sigma and effective exposure of 15 ksec, and 80 +/- 10 mCrab at 9 sigma between 10-25 keV. A short (15 sec) X-ray burst is detected with a 3-25 keV peak flux of 0.6 Crab at UT 10:46:39 on February 14th.INTEGRAL will continue to monitor the Galactic bulge about every third day until mid April, and observation results from near real time data will be made available at: http://integral.esac.esa.int/BULGE/index.html

AB - A new season of the INTEGRAL Galactic bulge monitoring program (see ATel #438) has begun with an observation of seven pointings obtained between 2012 Feb 14.375 (9 UT) and 14.528 (12:41 UT), and reveals several transient X-ray sources detected by the twin JEM-X instruments. For temporary technical reasons the IBIS instrument was not taking data during these pointings.We find the low-mass X-ray binary SAX J1747.0-2853 at a flux of 245 +/-65 mCrab between 3-10 keV with a detection significance of 4 sigma for a total effective exposure of 14.9 ksec. The source is not detected in the 10-25 keV band with an upper limit of 5 mCrab. The last outburst of this transient source was observed a year ago, lasting from end of January until at least end of March 2011 (see, e.g., ATels #3123, #3172, #3183, #3217).The black hole candidate and microquasar H1743-322 (also known as IGR J17464-3213), observed during a total effective exposure of 7.5 ksec, is measured at a flux of 350 +/- 100 mCrab with a detection significance of 3.5 sigma between 3-10 keV, and 53 +/-25 mCrab at 2.5 sigma between 10-25 keV. The source was observed by INTEGRAL at the beginning of an outburst in April 2011 (ATels #3263, 3267), and renewed activity was reported by MAXI at the end of 2011 (ATel #3842).The X-ray burster KS 1741-293 (AX J1744.8-2921) is clearly active at a measured flux of 415 +/- 75 mCrab between 3-10 keV for a detection significance of 5.5 sigma and effective exposure of 15 ksec, and 80 +/- 10 mCrab at 9 sigma between 10-25 keV. A short (15 sec) X-ray burst is detected with a 3-25 keV peak flux of 0.6 Crab at UT 10:46:39 on February 14th.INTEGRAL will continue to monitor the Galactic bulge about every third day until mid April, and observation results from near real time data will be made available at: http://integral.esac.esa.int/BULGE/index.html

KW - X-ray

KW - Black hole

KW - Neutron star

KW - Transient

M3 - Net publication - Internet publication

T3 - The Astronomer's telegram

ER -

INTEGRAL Bulge monitoring program detects several active transients with JEM-X

Abstract

Keywords

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INTEGRAL Galactic Bulge Monitoring Program

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