Search Publications
Statistical Relationships between Solar, Interplanetary, and Geomagnetic Disturbances, 1976-2000: 3
Yermolaev, Yu. I.; Yermolaev, M. Yu.
In this paper we continue the analysis of the influence of solar and interplanetary events on magnetic storms of the Earth that was started in [9, 10]. Different experimental results on solar-terrestrial physics are analyzed in the study and the effects are determined that arise due to differences in the methods used to analyze the data. The class…
JEM-X inflight performance
Andersson, H.; Frontera, F.; Costa, E. +46 more
We summarize the inflight performance of JEM-X, the X-ray monitor on the INTEGRAL mission during the initial ten months of operations. The JEM-X instruments have now been tuned to stable operational conditions. The performance is found to be close to the pre-launch expectations. The ground calibrations and the inflight calibration data permit to d…
A gas and dust rich giant elliptical galaxy in the ISOPHOT Serendipity Survey
Krause, O.; Lemke, D.; Klaas, U. +3 more
We present a multi-wavelength study of the unusual galaxy ISOSS J 15079+7247. With a bolometric luminosity of LFIR ~ 2 x 1012 Lsun this object is one of the most luminous galaxies detected by the 170 µm ISOPHOT Serendipity Survey (ISOSS). We have obtained 1.2 mm continuum and CO (1-0) line observations, optic…
Detection of the Long-Term Microwave `Darkening' Before the 14 July 2000 Flare
Tokhchukova, Susanna; Bogod, Vladimir
A gradual microwave darkening during several days of the preflare phase in the active region (AR) NOAA 9077, before the powerful proton event on 14 July 2000 was detected. The associated change of the circular polarization structure in the form of narrow-band double inversion of the sign was marked. The effects were revealed in a wide range of rad…
The Complete Far Ultraviolet Spectroscopic Explorer Spectrum of the Small Magellanic Cloud Star Sk 108
Mallouris, Christoforos
The complete FUSE spectrum of the SMC Wolf-Rayet binary star Sk 108 is presented. The spectrum covers the 905-1186 Å wavelength range at a resolution of about 12,500 and a S/N of 25-50. Detailed component information from higher resolution, UV and optical spectra is used to model the far-UV absorption lines of the ISM in the Galaxy and SMC, and sp…
Maffei 1 with the Hubble Space Telescope
McCall, Marshall L.; Buta, R.
High-resolution R, I, and Hα images of the center of Maffei 1, the nearest normal giant elliptical galaxy (M0V=-20.9), have been acquired with the Hubble Space Telescope. At its distance of 3.0 Mpc, 1 pixel in the Planetary Camera field covers only 0.66 pc. The observations reveal that Maffei 1 is a ``core type'' elliptical g…
Hubble Space Telescope Observations of the Nova-like Cataclysmic Variable V348 Puppis
Long, Knox S.; Froning, Cynthia S.; Baptista, Raymundo
We present time series UV and optical (1150-8000 Å) spectrophotometry of the nova-like (NL) cataclysmic variable V348 Pup through and after eclipse. Outside of eclipse the spectrum is characterized by a blue continuum, strong line emission, and a broad dip from 2000 to 3000 Å. The continuum eclipse depth is roughly the same over the entire wavelen…
VLA Radio Positions of Stars: 1978-1995
Johnston, Kenneth; de Vegt, Christian; Gaume, Ralph
VLA astrometric positions of the radio emission from 52 stars are reported, from observations obtained between 1978 and 1995. The positions of these stars have been obtained and reduced in a uniform manner. Based on our measurements, the offset of the optical (Hipparcos) frame from the radio reference frame is in agreement with the Hipparcos extra…
η Carinae: The optical flare-like events during low-excitation passages
Sterken, C.; van Genderen, A. M.; Allen, W. H.
The 1992.5 and 1998.0 low-excitation events of the possible binary in the core of η Carinae show a conspicuous flare-like event in optical and near-ultraviolet light. These events last a couple of months and have a light amplitude of 0.1m-0.2m in V. Considering the presence of a dense (bi-polar) stellar wind, one explanation could be that some typ…
Solar cycle dependence of interplanetary Lyman α emission and solar wind anisotropies derived from NOZOMI/UVS and SOHO/SWAN observations
Bertaux, Jean-Loup; Lallement, Rosine; Taguchi, Makoto +5 more
We have investigated the distributions of neutral interplanetary hydrogen Lyman α emission and their solar cycle dependence from observations with the ultraviolet imaging spectrometer (UVS) onboard the NOZOMI spacecraft and the solar wind anisotropy instrument (SWAN) onboard the solar and heliospheric observatory (SOHO) spacecraft. The SOHO/SWAN o…