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J06587-5558 -- A Very Unusual Polarised Radio Source
H. Liang, R. D. Ekers, R. W. Hunstead +2
We have found a peculiar radio source in the field of one of the hottest known clusters of galaxies 1E0657-56. It is slightly extended, highly polarised (54% at 8.8GHz) and has a v…
Constraining H0 from Chandra Observations of Q0957+561
G. Chartas, V. Gupta, G. Garmire +4
We report the detection of the lens cluster of the gravitational lens (GL) system Q0957+561 from a deep observation with the Advanced CCD Imaging Spectrometer on-board the Chandra…
Rapid UBVRI Follow-up of the Highly Collimated Optical Afterglow of GRB010222
K. Z. Stanek, P. M. Garnavich, S. Jha +6
(Abridged) We present the earliest optical observations of the optical counterpart to the GRB 010222, obtained with the FLWO 1.2-m telescope in UBVRI passbands, starting 3.64 hours…
A Black Hole of > 6 Solar Masses in the X-ray Nova XTE J1118+480
J. E. McClintock, M. R. Garcia, N. Caldwell +3
Observations of the quiescent X-ray nova XTE J1118+480 with the new 6.5-m MMT have revealed that the velocity amplitude of the dwarf secondary is 698 +/- 14 km/s and the orbital pe…