The Chandra Cygnus OB2 Legacy Survey: Design and X-Ray Point-source Catalog

被引：8

作者：

Wright, Nicholas J. ^{[1
,2
,3
]}

Drake, Jeremy J. ^{[1
]}

Guarcello, Mario G. ^{[1
,4
]}

Aldcroft, Tom L. ^{[1
]}

Kashyap, Vinay L. ^{[1
]}

Damiani, Francesco ^{[4
]}

Depasquale, Joe ^{[1
]}

Fruscione, Antonella ^{[1
]}

机构：

[1] Ctr Astrophys, 60 Garden St, Cambridge, MA 02138 USA

[2] Univ Hertfordshire, Ctr Astrophys Res, Hatfield AL10 9AB, England

[3] Keele Univ, Astrophys Grp, Keele ST5 5BG, England

[4] Osserv Astron Palermo, INAF, Piazza Parlamento 1, I-90134 Palermo, Italy

来源：

ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES | 2023年 / 269卷 / 01期

关键词：

MASSIVE STARS;

D O I：

10.3847/1538-4365/acdd62

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The Cygnus OB2 association is the largest concentration of young and massive stars within 2 kpc of the Sun, including an estimated similar to 65 O-type stars and hundreds of OB stars. The Chandra Cygnus OB2 Legacy Survey is a large imaging program undertaken with the Advanced CCD Imaging Spectrometer on board the Chandra X-ray Observatory. The survey has imaged the central 0.5 deg2 of the Cyg OB2 association with an effective exposure of similar to 120 ks and an outer 0.35 deg2 area with an exposure of similar to 60 ks. Here we describe the survey design and observations, discuss the data reduction and source detection, and present a catalog of similar to 8000 X-ray point sources. The survey design employs a grid of 36 heavily (similar to 50%) overlapping pointings, a method that overcomes Chandra's low off-axis sensitivity and produces a highly uniform exposure over the inner 0.5 deg2. The full X-ray catalog is described here and is made available online.

引用

页数：14

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