New X-ray transient IGR J11435-6109 discovered with INTEGRAL

S. A. Grebenev; P. Ubertini; J. Chenevez; N. Mowlavi; J. -P. Roques; N. Gehrels; E. Kuulkers

New X-ray transient IGR J11435-6109 discovered with INTEGRAL

S. A. Grebenev^*, P. Ubertini, J. Chenevez, N. Mowlavi, J. -P. Roques, N. Gehrels, E. Kuulkers

^*Corresponding author for this work

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

Abstract

A new hard X-ray transient, IGR J11435-6109, was discovered with the IBIS/ISGRI telescope on board INTEGRAL on Nov. 23, 2004, during observations (3 successive pointings at 12:30-14:20 UTC) dedicated to the Galactic Plane Scan. The source was located 1 deg off the known X-ray pulsar twins, 4U1145-619 and 1E1145.1-6141, at the position, R.A.= 11h43m52s, Dec.= -61d09m00s (equinox 2000.0, error radius 2.5'), generally consistent with that of the faint ROSAT source 1RXS J114358.1-610736. The S/N ratio was 9.5 in the 18-45 keV mosaic image, the corresponding average flux was equal to 18+/-2 mCrab.

The source was also detected in the standard X-ray band with the JEM-X telescope during one of the pointings. This detection as well as the possible association of IGR J11435-6109 with 1RXS J114358.1-610736 let us to suggest that it differs from the main population of (strongly photoabsorbed) new INTEGRAL sources.

We encourage follow-up observations of this source at all wavelengths.

Original language	English
Publication date	29 Nov 2004
Publication status	Published - 29 Nov 2004

Series	The Astronomer's telegram
Number	ATel #350

Keywords

Radio
Infra-red
Optical
X-ray
Request for observations
Binary
Black hole
Neutron star
Transient

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title = "New X-ray transient IGR J11435-6109 discovered with INTEGRAL",

abstract = " A new hard X-ray transient, IGR J11435-6109, was discovered with the IBIS/ISGRI telescope on board INTEGRAL on Nov. 23, 2004, during observations (3 successive pointings at 12:30-14:20 UTC) dedicated to the Galactic Plane Scan. The source was located 1 deg off the known X-ray pulsar twins, 4U1145-619 and 1E1145.1-6141, at the position, R.A.= 11h43m52s, Dec.= -61d09m00s (equinox 2000.0, error radius 2.5'), generally consistent with that of the faint ROSAT source 1RXS J114358.1-610736. The S/N ratio was 9.5 in the 18-45 keV mosaic image, the corresponding average flux was equal to 18+/-2 mCrab.The source was also detected in the standard X-ray band with the JEM-X telescope during one of the pointings. This detection as well as the possible association of IGR J11435-6109 with 1RXS J114358.1-610736 let us to suggest that it differs from the main population of (strongly photoabsorbed) new INTEGRAL sources.We encourage follow-up observations of this source at all wavelengths. ",

keywords = "Radio, Infra-red, Optical, X-ray, Request for observations, Binary, Black hole, Neutron star, Transient",

author = "Grebenev, {S. A.} and P. Ubertini and J. Chenevez and N. Mowlavi and Roques, {J. -P.} and N. Gehrels and E. Kuulkers",

year = "2004",

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number = "ATel #350",

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TY - ICOMM

T1 - New X-ray transient IGR J11435-6109 discovered with INTEGRAL

AU - Grebenev, S. A.

AU - Ubertini, P.

AU - Chenevez, J.

AU - Mowlavi, N.

AU - Roques, J. -P.

AU - Gehrels, N.

AU - Kuulkers, E.

PY - 2004/11/29

Y1 - 2004/11/29

N2 - A new hard X-ray transient, IGR J11435-6109, was discovered with the IBIS/ISGRI telescope on board INTEGRAL on Nov. 23, 2004, during observations (3 successive pointings at 12:30-14:20 UTC) dedicated to the Galactic Plane Scan. The source was located 1 deg off the known X-ray pulsar twins, 4U1145-619 and 1E1145.1-6141, at the position, R.A.= 11h43m52s, Dec.= -61d09m00s (equinox 2000.0, error radius 2.5'), generally consistent with that of the faint ROSAT source 1RXS J114358.1-610736. The S/N ratio was 9.5 in the 18-45 keV mosaic image, the corresponding average flux was equal to 18+/-2 mCrab.The source was also detected in the standard X-ray band with the JEM-X telescope during one of the pointings. This detection as well as the possible association of IGR J11435-6109 with 1RXS J114358.1-610736 let us to suggest that it differs from the main population of (strongly photoabsorbed) new INTEGRAL sources.We encourage follow-up observations of this source at all wavelengths.

AB - A new hard X-ray transient, IGR J11435-6109, was discovered with the IBIS/ISGRI telescope on board INTEGRAL on Nov. 23, 2004, during observations (3 successive pointings at 12:30-14:20 UTC) dedicated to the Galactic Plane Scan. The source was located 1 deg off the known X-ray pulsar twins, 4U1145-619 and 1E1145.1-6141, at the position, R.A.= 11h43m52s, Dec.= -61d09m00s (equinox 2000.0, error radius 2.5'), generally consistent with that of the faint ROSAT source 1RXS J114358.1-610736. The S/N ratio was 9.5 in the 18-45 keV mosaic image, the corresponding average flux was equal to 18+/-2 mCrab.The source was also detected in the standard X-ray band with the JEM-X telescope during one of the pointings. This detection as well as the possible association of IGR J11435-6109 with 1RXS J114358.1-610736 let us to suggest that it differs from the main population of (strongly photoabsorbed) new INTEGRAL sources.We encourage follow-up observations of this source at all wavelengths.

KW - Radio

KW - Infra-red

KW - Optical

KW - X-ray

KW - Request for observations

KW - Binary

KW - Black hole

KW - Neutron star

KW - Transient

M3 - Net publication - Internet publication

T3 - The Astronomer's telegram

ER -

New X-ray transient IGR J11435-6109 discovered with INTEGRAL

Abstract

Keywords

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