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Observation of X-ray lines from a Gamma-Ray Burst (GRB991216): Evidence of Moving Ejecta from the Progenitor
L. Piro, G. Garmire, M. Garcia +18
We report on the discovery of two emission features observed in the X-ray spectrum of the afterglow of the gamma-ray burst (GRB) of 16 Dec. 1999 by the Chandra X-Ray Observatory. T…
X-ray imaging of the Seyfert 2 galaxy Circinus with Chandra
R. M. Sambruna, W. N. Brandt, G. Chartas +5
We present results from the zeroth-order imaging of a Chandra HETGS observation of the nearby Seyfert 2 galaxy Circinus. Twelve X-ray sources were detected in the ACIS-S image of t…
Detection of X-ray Emission from Gravitationally Lensed Submillimeter Sources in the Field of Abell 370
M. W. Bautz, M. R. Malm, F. K. Baganoff +5
We report the detection by Chandra of SMM J02399-0134 and SMM J02399-0136, two distant (z=1.06 and z=2.81, respectively) submillimeter sources gravitationally magnified by the gala…
X-ray Sources in the Hubble Deep Field Detected by Chandra
A. E. Hornschemeier, W. N. Brandt, G. P. Garmire +11
We present first results from an X-ray study of the Hubble Deep Field North (HDF-N) and its environs obtained using 166 ks of data collected by the Advanced CCD Imaging Spectromete…
Mitigating Charge Transfer Inefficiency in the Chandra X-ray Observatory's ACIS Instrument
L. K. Townsley, P. S. Broos, G. P. Garmire +1
The ACIS front-illuminated CCDs onboard the Chandra X-ray Observatory were damaged in the extreme environment of the Earth's radiation belts, resulting in enhanced charge transfer…