During the Space Telescope and Optical Reverberation Mapping Project observations of NGC 5548, the continuum and emission-line variability became decorrelated during the second half of the six-month-long observing campaign. Here we present Swift and Chandra X-ray spectra of NGC 5548 obtained as part of the campaign. The Swift spectra show that
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Space Telescope and Optical Reverberation Mapping Project. VII. Understanding the Ultraviolet Anomaly in NGC 5548 with X-Ray SpectroscopyMathur, S. et al.92017
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Space Velocities of L- and T-Type Dwarfs
We have obtained radial velocities of a sample of 18 ultracool dwarfs (M6.5-T8) using high-resolution, near-infrared spectra obtained with NIRSPEC and the Keck II telescope. We have confirmed that the radial velocity of Gl 570D is coincident with that of the K-type primary star Gl 570A, thus providing additional support for their true companionship
Zapatero Osorio, M. R. et al.Advertised on:
92007 -
Space-qualified liquid-crystal variable retarders for wide-field-of-view coronagraphs
Liquid-crystal variable retarders (LCVRs) are an emergent technology for space-based polarimeters, following its success as polarization modulators in ground-based polarimeters and ellipsometers. Wide-field double nematic LCVRs address the high angular sensitivity of nematic LCVRs at some voltage regimes. We present a work in which wide-field LCVRs
Uribe-Patarroyo, N. et al.Advertised on:
92011 -
Spatial relation between the 1908 Messina Straits earthquake slip and recent earthquake distribution
We re-analyze coseismic surface displacement data of the 1908 Messina earthquake, taking into account both correlated and uncorrelated uncertainties, to re-determine the slip distribution on the fault plane. Using a data set of earthquakes occurred at crustal depth in the Messina Straits between July 1988 and December 2004, we evidence a peculiar
Amoruso, A. et al.Advertised on:
92006 -
Spectral properties of asteroids in cometary orbits
A&A 481, 861-877 (2008), DOI: 10.1051/0004-6361:20078340
Licandro, J. et al.Advertised on:
92008 -
Spectral properties of near-Earth asteroids on cometary orbits
We studied the spectral distributions of near-Earth asteroids on cometary orbits (NEACOs) in order to identify potential dormant or extinct comets among these objects. We present the spectral observations for 19 NEACOs obtained with Isaac Newton Telescope and Infrared Telescope Facility (IRTF). Although initially classified as asteroid, one of our
Popescu, M. et al.Advertised on:
92017