SIMBAD references

2007ApJS..169..401K - Astrophys. J., Suppl. Ser., 169, 401-429 (2007/April-0)

Chandra multiwavelength project X-ray point source catalog.

KIM M., KIM D.-W., WILKES B.J., GREEN P.J., KIM E., ANDERSON C.S., BARKHOUSE W.A., EVANS N.R., IVEZIC Z., KAROVSKA M., KASHYAP V.L., LEE M.G., MAKSYM P., MOSSMAN A.E., SILVERMAN J.D. and TANANBAUM H.D.

Abstract (from CDS):

We present the Chandra Multiwavelength Project (ChaMP) X-ray point source catalog with ∼6800 X-ray sources detected in 149 Chandra observations covering ∼10 deg2. The full ChaMP catalog sample is 7 times larger than the initial published ChaMP catalog. The exposure time of the fields in our sample ranges from 0.9 to 124 ks, corresponding to a deepest X-ray flux limit of f0.5–8.0=9x10–16 ergs/cm2/s. The ChaMP X-ray data have been uniformly reduced and analyzed with ChaMP-specific pipelines and then carefully validated by visual inspection. The ChaMP catalog includes X-ray photometric data in eight different energy bands as well as X-ray spectral hardness ratios and colors. To best utilize the ChaMP catalog, we also present the source reliability, detection probability, and positional uncertainty. To quantitatively assess those parameters, we performed extensive simulations. In particular, we present a set of empirical equations: the flux limit as a function of effective exposure time and the positional uncertainty as a function of source counts and off-axis angle. The false source detection rate is ∼1% of all detected ChaMP sources, while the detection probability is better than ∼95% for sources with counts ≳30 and off-axis angle <5'. The typical positional offset between ChaMP X-ray source and their SDSS optical counterparts is 0.7''±0.4'', derived from ∼900 matched sources.

Abstract Copyright:

Journal keyword(s): Catalogs - Surveys - X-Rays: General

VizieR on-line data: <Available at CDS (J/ApJS/169/401): table1.dat table3.dat table4.dat table5.dat table6.dat table7.dat table8.dat table9.dat table10.dat table11.dat>

Nomenclature: Table 3: CXOMP JHHMMSS.s+DDMMSS N= about 6800.

Status at CDS : All or part of tables of objects could be ingested in SIMBAD with priority 2.

Simbad objects: 2

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