THE CHANDRA ACIS SURVEY OF M33 (ChASeM33): THE FINAL SOURCE CATALOG

Journal Article · Fri Apr 01 00:00:00 EDT 2011 · Astrophysical Journal, Supplement Series

DOI:https://doi.org/10.1088/0067-0049/193/2/31· OSTI ID:21560400

Tuellmann, R; Gaetz, T J; Plucinsky, P P; Challis, P; Edgar, R J; Kirshner, R P ^[1]; Kuntz, K D; Blair, W P ^[2]; Williams, B F ^[3]; Pietsch, W; Haberl, F ^[4]; Long, K S ^[5]; Sasaki, M ^[6]; Winkler, P F ^[7]; Pannuti, T G ^[8]; Helfand, D J ^[9]; Hughes, J P ^[10]; Mazeh, T ^[11]; Shporer, A ^[12]

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1. Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138 (United States)
2. Department of Physics and Astronomy, Johns Hopkins University, 3400 North Charles Street, Baltimore, MD 21218 (United States)
3. Astronomy Department, University of Washington, Seattle, WA 98195 (United States)
4. Max-Planck-Institut fuer Extraterrestrische Physik, Giessenbachstrasse, 85741 Garching (Germany)
5. Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD 21218 (United States)
6. Institut fuer Astronomie und Astrophysik, Eberhard Karls Universitaet, Tuebingen (Germany)
7. Department of Physics, Middlebury College, Middlebury, VT 05753 (United States)
8. Space Science Center, 235 Martindale Drive, Morehead State University, Morehead, KY 40351 (United States)
9. Columbia Astrophysics Laboratory, 550 West 120th Street, New York, NY 10027 (United States)
10. Department of Physics and Astronomy, Rutgers University, 136 Frelinghuysen Road, Piscataway, NJ 08854-8019 (United States)
11. School of Physics and Astronomy, Raymond and Beverly Sackler Faculty of Exact Sciences, Tel Aviv University, Tel Aviv 69978 (Israel)
12. Las Cumbres Observatory Global Telescope Network, 6740 Cortona Drive, Santa Barbara, CA 93117 (United States)

This study presents the final source catalog of the Chandra ACIS Survey of M33 (ChASeM33). With a total exposure time of 1.4 Ms, ChASeM33 covers {approx}70% of the D{sub 25} isophote (R {approx} 4.0 kpc) of M33 and provides the deepest, most complete, and detailed look at a spiral galaxy in X-rays. The source catalog includes 662 sources, reaches a limiting unabsorbed luminosity of {approx}2.4x10{sup 34} erg s{sup -1} in the 0.35-8.0 keV energy band, and contains source positions, source net counts, fluxes and significances in several energy bands, and information on source variability. The analysis challenges posed by ChASeM33 and the techniques adopted to address these challenges are discussed. To constrain the nature of the detected X-ray source, hardness ratios were constructed and spectra were fit for 254 sources, follow-up MMT spectra of 116 sources were acquired, and cross-correlations with previous X-ray catalogs and other multi-wavelength data were generated. Based on this effort, 183 of the 662 ChASeM33 sources could be identified. Finally, the luminosity function (LF) for the detected point sources as well as the one for the X-ray binaries (XRBs) in M33 is presented. The LFs in the soft band (0.5-2.0 keV) and the hard band (2.0-8.0 keV) have a limiting luminosity at the 90% completeness limit of 4.0 x 10{sup 34} erg s{sup -1} and 1.6 x 10{sup 35} erg s{sup -1}(for D = 817 kpc), respectively, which is significantly lower than what was reported by previous XRB population studies in galaxies more distant than M33. The resulting distribution is consistent with a dominant population of high-mass XRBs as would be expected for M33.

• OSTI ID: 21560400
• Journal Information: Astrophysical Journal, Supplement Series, Vol. 193, Issue 2; Other Information: DOI: 10.1088/0067-0049/193/2/31; ISSN 0067-0049
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTROPHYSICS
COSMOLOGY AND ASTRONOMY
CATALOGS
LUMINOSITY
POINT SOURCES
SUPERNOVA REMNANTS
X-RAY GALAXIES
X-RAY SOURCES
COSMIC RADIO SOURCES
COSMIC RAY SOURCES
COSMIC X-RAY SOURCES
DOCUMENT TYPES
GALAXIES
OPTICAL PROPERTIES
PHYSICAL PROPERTIES
RADIATION SOURCES