Chandra X-Ray Observations of Young Clusters. I. NGC 2264 Data
Abstract
We present results of a Chandra observation of a field in NGC 2264. The observations were taken with the ACIS-I camera with an exposure time of 48.1 ks. We present a catalog of 263 sources, which includes X-ray luminosity, optical and infrared photometry, and X-ray variability information. We found 41 variable sources, 14 of which have a flarelike light curve, and two of which have a pattern of a steady increase or decrease over a 10 hr period. The optical and infrared photometry for the stars identified as X-ray sources are consistent with most of these objects being pre-main-sequence stars with ages younger than 3 Myr.
- Publication:
-
The Astronomical Journal
- Pub Date:
- May 2004
- DOI:
- 10.1086/383290
- arXiv:
- arXiv:astro-ph/0401533
- Bibcode:
- 2004AJ....127.2659R
- Keywords:
-
- Stars: Activity;
- Stars: Pre-Main-Sequence;
- X-rays: stars;
- Astrophysics
- E-Print:
- 36 pages, 13 figures, AJ in press (May 2004)