@article{
 title = {CHANDRA OBSERVATIONS OF THE ANTENNAE GALAXIES ( NGC4038/39): II. DETECTION AND ANALYSIS OF GALAXIAN X-RAY SOURCES},
 type = {article},
 year = {2002},
 identifiers = {[object Object]},
 keywords = {Subject headings,galaxies,individual — galaxies,interactions — X-rays,peculiar — galaxies},
 pages = {239-260},
 volume = {142},
 websites = {https://pdfs.semanticscholar.org/6dab/484d6ee6a162c772982168b7ba3939660147.pdf},
 id = {c3f2fc3d-c8f0-329d-b0ba-6c1629643f2f},
 created = {2017-06-20T21:09:38.992Z},
 accessed = {2017-06-20},
 file_attached = {true},
 profile_id = {d9ca9665-cda3-3617-b3e8-ecfc7a8d9739},
 group_id = {5a95a0b6-1946-397c-b16a-114c6fdf3127},
 last_modified = {2017-07-29T20:18:54.247Z},
 read = {false},
 starred = {false},
 authored = {false},
 confirmed = {true},
 hidden = {false},
 citation_key = {Zezas2002},
 folder_uuids = {a55b3938-9553-4705-9661-67c5f054d79a},
 private_publication = {false},
 abstract = {We report the detailed analysis of the X-ray properties of the discrete sources detected in a long (72 ks) Chandra ACIS-S observation of the Antennae galaxies. We detect 49 sources, down to a detection limit of ∼ 10 38 erg s −1 ; 18 sources have L X > 10 39 erg s −1 (Ultra Luminous X-ray sources; ULXs). Six of the 49 sources have an extended component. Two sources show evidence for variability during this observation, and three sources exhibit long term variability in timescales of a few years. The spectra of the discrete sources are diverse, suggesting different emission mechanisms, broadly correlated with the source luminosity: the most luminous sources exhibit harder emission, while the spectra of fainter sources appear softer. Spectra and variability suggest that the ULXs may be binary accretion sources; Supernova remnants or hot ISM in the Chandra beam may be responsible for some of the softer sources.},
 bibtype = {article},
 author = {Zezas, A. and Fabbiano, G. and Rots, A. H. and Murray, S. S.},
 journal = {The Astrophysical Journal}
}

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