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HST Photometry of trans-Neptunian Objects
Buie, M. W.; Spencer, J. R.; Cruikshank, D. P. +6 more
From July 2001 to June 2002, an HST snapshot program obtained V, R and I photometry for 72 TNOs. The TNOs were sorted by dynamical class, and Spearman rank correlation statistics were calculated for each combination of color and orbital parameter. No strong correlations were found for the combined sample of TNOs, the resonant TNOs, or the non-reso…
SOHO/LASCO observation of an outburst of Comet 2P/Encke at its 2000 perihelion passage
Lamy, P.; Groussin, O.; Biesecker, D. A.
Comet 2P/Encke was observed with the SOHO/LASCO C2 and C3 coronagraphs over a time interval of 11 days, starting 4 days before its September 2000 perihelion passage and through several broadband visible filters. The lightcurve reveals an outburst which started 4.9 days after perihelion, with the brightness of the coma increasing by 1.5 mag in just…
Simultaneous ASCA and Hubble Space Telescope/GHRS Observations of Cygnus X-2/V1341 Cygni
McCray, R.; Raymond, J. C.; Kallman, T. +4 more
We present results from ultraviolet and X-ray observations of the low-mass X-ray binary Cygnus X-2. The simultaneous Hubble Space Telescope/GHRS and ASCA observations took place during the low state of an 82 day cycle. We compare our observations as well as archival IUE and RXTE data with models that predict ultraviolet and optical continuum emiss…
ERO R1 in the Field of CL 0939+4713: Evidence for an S0-like Galaxy at z ~ 1.5
Kobayashi, Naoto; Terada, Hiroshi; Imanishi, Masatoshi +11 more
We present further observations of the extremely red object ERO J094258+4659.2, identified earlier by Iye et al. as ERO R1 in their deep images of the cluster A851. We estimate its redshift independently by eight-band photometric redshift determination and cross-correlation of a new H-band spectrum with the optical spectra of local E/S0 galaxies a…
Modeling radio emission attenuation lanes observed by the Galileo and Cassini spacecraft
Gurnett, D. A.; Hospodarsky, G. B.; Kurth, W. S. +3 more
The Cassini gravity-assisted flyby of Jupiter provided an opportunity to investigate radio emission attenuation lanes that were previously observed in the Voyager and Galileo data. The Cassini radio and plasma wave science (RPWS) investigation is the most advanced plasma wave instrument to visit the Jovian system, measuring electric fields over th…
Near-source and remote observations of kilometric continuum radiation from multispacecraft observations
Gurnett, D. A.; Pickett, J. S.; Menietti, J. D. +2 more
Kilometric continuum (KC) radiation was first identified from Geotail plasma wave observations. Past authors have shown that this emission has a frequency range that overlaps that of the auroral kilometric radiation (AKR) but is characterized by a fine structure of narrow-bandwidth, linear features that have nearly constant or drifting frequency. …
New Identifications of Mn VII and Fe VIII Lines Belonging to Transitions of the Type 3p64p-3p64d and 3p53d2-3p64d
Feldman, U.; Ekberg, J. O.
The Solar Ultraviolet Measurements of Emitted Radiation (SUMER) spectrometer aboard the Solar and Heliospheric Observatory (SOHO) recorded a large number of spectra in the 500-1600 Å region. Many of the detected spectral lines have been identified as transitions in ions from elements with low-to-moderate atomic numbers (Z<=20). However, a subst…
XMM-Newton Observation of the Cluster of Galaxies Abell 1650
Yamashita, Koujun; Takahashi, Seiji
We present the nonuniform distribution of temperature and abundance in the angular extent of 10' (1.4Mpc) in A1650 observed by XMM-Newton. Spectral analysis was carried out in 19 systematically-subdivided regions, and in 15 specified regions referred to the hardness ratio (HR) map. The value of HR, defined as the ratio of counts in the 1.6-10keV b…
Latitudinal and radial variation of >2 GeV/n protons and alpha-particles at solar maximum: Ulysses COSPIN/KET and neutron monitor network observations
Kunow, H.; Heber, B.; Müller-Mellin, R. +4 more
Ulysses, launched in October 1990, began its second out-of-ecliptic orbit in September 1997. In 2000/2001 the spacecraft passed from the south to the north polar regions of the Sun in the inner heliosphere. In contrast to the first rapid pole to pole passage in 1994/1995 close to solar minimum, Ulysses experiences now solar maximum conditions. The…
Filament eruption without coronal mass ejection
Moore, Ronald L.; Choudhary, Debi Prasad
We report characteristics of quiescent filament eruptions that were not associated with coronal mass ejections (CMEs). We examined 12 quiescent filament eruptions, each of which was located far from disk center (>=0.7 RSun) in diffuse remnant magnetic fields of decayed active regions, was well observed in full-disk movies in Hα and F…