XBootes

An X-ray survey of the NDWFS Bootes field. II. The X-ray source catalog

Almus Kenter, Stephen S. Murray, William R. Forman, Christine Jones, Paul Green, Christopher S. Kochanek, Alexey Vikhlinin, Daniel Fabricant, Giovani Fazio, Katherine Brand, Michael J I Brown, Arjun Dey, Buell Tomasson Jannuzi, Joan Najita, Brian McNamara, Joseph Shields, Marcia J Rieke

Research output: Contribution to journalArticle

104 Citations (Scopus)

Abstract

We present results from a Chandra survey of the 9 deg 2 Bootes field of the NOAO Deep Wide-Field Survey (NDWFS). This XBootes survey consists of 126 separate contiguous ACIS-I observations each of approximately 5000 s in duration. These unique Chandra observations allow us to search for large-scale structure and to calculate X-ray source statistics over a wide, contiguous field of view with arcsecond angular resolution and uniform coverage. Optical spectroscopic follow-up observations and the rich NDWFS data set will allow us to identify and classify these X-ray-selected sources. Using wavelet decomposition, we detect 4642 point sources with n ≥ 2 counts. In order to keep our detections ∼99% reliable, we limit our list to sources with n ≥ 4 counts. For a 5000 s observation and assuming a canonical unabsorbed active galactic nucleus (AGN) type X-ray spectrum, a 4 count on-axis source corresponds to a flux of 4.7 × 10 -15 ergs cm -2 s -1 in the soft (0.5-2 keV) band, 1.5 × 10 -14 ergs cm -2 s -1 in the hard (2-7 keV) band, and 7.8 × 10 -15 ergs cm -2 s -1 in the full (0.5-7 keV) band. The full 0.5-7 keV band n ≥ 4 count list has 3293 point sources. In addition to the point sources, 43 extended sources have been detected, consistent with the depth of these observations and the number counts of clusters. We present here the X-ray catalog for the XBootes survey, including source positions, X-ray fluxes, hardness ratios, and their uncertainties. We calculate and present the differential number of sources per flux density interval, N(S), for the point sources. In the soft (0.5-2 keV) band, N(S) is well fitted by a broken power law with slope of 2.60 -0.12 +0.11 at bright fluxes and 1.74 -0.22 +0.28 for faint fluxes. The hard source N(S) is well described by a single power law with an index of -2.93 -0.09 +0.09.

Original languageEnglish (US)
Pages (from-to)9-20
Number of pages12
JournalAstrophysical Journal, Supplement Series
Volume161
Issue number1
DOIs
StatePublished - Nov 2005

Fingerprint

field survey
catalogs
point source
erg
point sources
x rays
power law
lists
field of view
wavelet
hardness
decomposition
angular resolution
active galactic nuclei
flux density
statistics
slopes
intervals

Keywords

  • Catalogs
  • Galaxies: active
  • Surveys
  • X-rays: general

ASJC Scopus subject areas

  • Space and Planetary Science

Cite this

XBootes : An X-ray survey of the NDWFS Bootes field. II. The X-ray source catalog. / Kenter, Almus; Murray, Stephen S.; Forman, William R.; Jones, Christine; Green, Paul; Kochanek, Christopher S.; Vikhlinin, Alexey; Fabricant, Daniel; Fazio, Giovani; Brand, Katherine; Brown, Michael J I; Dey, Arjun; Jannuzi, Buell Tomasson; Najita, Joan; McNamara, Brian; Shields, Joseph; Rieke, Marcia J.

In: Astrophysical Journal, Supplement Series, Vol. 161, No. 1, 11.2005, p. 9-20.

Research output: Contribution to journalArticle

Kenter, A, Murray, SS, Forman, WR, Jones, C, Green, P, Kochanek, CS, Vikhlinin, A, Fabricant, D, Fazio, G, Brand, K, Brown, MJI, Dey, A, Jannuzi, BT, Najita, J, McNamara, B, Shields, J & Rieke, MJ 2005, 'XBootes: An X-ray survey of the NDWFS Bootes field. II. The X-ray source catalog', Astrophysical Journal, Supplement Series, vol. 161, no. 1, pp. 9-20. https://doi.org/10.1086/444379
Kenter, Almus ; Murray, Stephen S. ; Forman, William R. ; Jones, Christine ; Green, Paul ; Kochanek, Christopher S. ; Vikhlinin, Alexey ; Fabricant, Daniel ; Fazio, Giovani ; Brand, Katherine ; Brown, Michael J I ; Dey, Arjun ; Jannuzi, Buell Tomasson ; Najita, Joan ; McNamara, Brian ; Shields, Joseph ; Rieke, Marcia J. / XBootes : An X-ray survey of the NDWFS Bootes field. II. The X-ray source catalog. In: Astrophysical Journal, Supplement Series. 2005 ; Vol. 161, No. 1. pp. 9-20.
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AU - Jones, Christine

AU - Green, Paul

AU - Kochanek, Christopher S.

AU - Vikhlinin, Alexey

AU - Fabricant, Daniel

AU - Fazio, Giovani

AU - Brand, Katherine

AU - Brown, Michael J I

AU - Dey, Arjun

AU - Jannuzi, Buell Tomasson

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AU - McNamara, Brian

AU - Shields, Joseph

AU - Rieke, Marcia J

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N2 - We present results from a Chandra survey of the 9 deg 2 Bootes field of the NOAO Deep Wide-Field Survey (NDWFS). This XBootes survey consists of 126 separate contiguous ACIS-I observations each of approximately 5000 s in duration. These unique Chandra observations allow us to search for large-scale structure and to calculate X-ray source statistics over a wide, contiguous field of view with arcsecond angular resolution and uniform coverage. Optical spectroscopic follow-up observations and the rich NDWFS data set will allow us to identify and classify these X-ray-selected sources. Using wavelet decomposition, we detect 4642 point sources with n ≥ 2 counts. In order to keep our detections ∼99% reliable, we limit our list to sources with n ≥ 4 counts. For a 5000 s observation and assuming a canonical unabsorbed active galactic nucleus (AGN) type X-ray spectrum, a 4 count on-axis source corresponds to a flux of 4.7 × 10 -15 ergs cm -2 s -1 in the soft (0.5-2 keV) band, 1.5 × 10 -14 ergs cm -2 s -1 in the hard (2-7 keV) band, and 7.8 × 10 -15 ergs cm -2 s -1 in the full (0.5-7 keV) band. The full 0.5-7 keV band n ≥ 4 count list has 3293 point sources. In addition to the point sources, 43 extended sources have been detected, consistent with the depth of these observations and the number counts of clusters. We present here the X-ray catalog for the XBootes survey, including source positions, X-ray fluxes, hardness ratios, and their uncertainties. We calculate and present the differential number of sources per flux density interval, N(S), for the point sources. In the soft (0.5-2 keV) band, N(S) is well fitted by a broken power law with slope of 2.60 -0.12 +0.11 at bright fluxes and 1.74 -0.22 +0.28 for faint fluxes. The hard source N(S) is well described by a single power law with an index of -2.93 -0.09 +0.09.

AB - We present results from a Chandra survey of the 9 deg 2 Bootes field of the NOAO Deep Wide-Field Survey (NDWFS). This XBootes survey consists of 126 separate contiguous ACIS-I observations each of approximately 5000 s in duration. These unique Chandra observations allow us to search for large-scale structure and to calculate X-ray source statistics over a wide, contiguous field of view with arcsecond angular resolution and uniform coverage. Optical spectroscopic follow-up observations and the rich NDWFS data set will allow us to identify and classify these X-ray-selected sources. Using wavelet decomposition, we detect 4642 point sources with n ≥ 2 counts. In order to keep our detections ∼99% reliable, we limit our list to sources with n ≥ 4 counts. For a 5000 s observation and assuming a canonical unabsorbed active galactic nucleus (AGN) type X-ray spectrum, a 4 count on-axis source corresponds to a flux of 4.7 × 10 -15 ergs cm -2 s -1 in the soft (0.5-2 keV) band, 1.5 × 10 -14 ergs cm -2 s -1 in the hard (2-7 keV) band, and 7.8 × 10 -15 ergs cm -2 s -1 in the full (0.5-7 keV) band. The full 0.5-7 keV band n ≥ 4 count list has 3293 point sources. In addition to the point sources, 43 extended sources have been detected, consistent with the depth of these observations and the number counts of clusters. We present here the X-ray catalog for the XBootes survey, including source positions, X-ray fluxes, hardness ratios, and their uncertainties. We calculate and present the differential number of sources per flux density interval, N(S), for the point sources. In the soft (0.5-2 keV) band, N(S) is well fitted by a broken power law with slope of 2.60 -0.12 +0.11 at bright fluxes and 1.74 -0.22 +0.28 for faint fluxes. The hard source N(S) is well described by a single power law with an index of -2.93 -0.09 +0.09.

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KW - Galaxies: active

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