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Chandra Orion Ultradeep Project: Observations and Source Lists
K. V. Getman, E. Flaccomio, P. S. Broos +21
We present a description of the data reduction methods and the derived catalog of more than 1600 X-ray point sources from the exceptionally deep January 2003 Chandra X-ray Observat…
KH 15D: A Spectroscopic Binary
John A. Johnson, Geoffrey W. Marcy, Catrina M. Hamilton +2
We present the results of a high-resolution spectroscopic monitoring program of the eclipsing pre-main-sequence star KH 15D that reveal it to be a single-line spectroscopic binary.…
A rotational and variability study of a large sample of PMS stars in NGC 2264
M. H. Lamm, C. A. L. Bailer-Jones, R. Mundt +2
We present the results of an extensive search for periodic and irregular variable pre-main sequence (PMS) stars in the young (2-4 Myr) open cluster NGC 2664, based on photometric m…
A Photometric Study of Stars in the MBM 12 Association
William Herbst, Eric C. Williams, Wendy P. Hawley
We have monitored four fields containing nine previously identified members of the MBM 12 association to search for photometric variability and periodicity in these pre-main sequen…