Science Archives Publication System

The population of massive stars in R136 from HST/FOC UV observations

DOI: 10.1007/BF00771048 Bibcode: 1993SSRv...66...69N

Leitherer, Claus; Nota, Antonella; de Marchi, Guido +2 more

New ultraviolet (λ≃1300 A, λ≃3400 A),HST FOC observations have been used to derive the UV color-magnitude diagram (CMD) of R136, with the main scientific goal of studying the upper end of the stellar mass function at ultraviolet wavelengths where the color degeneracy encountered in visual CMDs is less severe. The CMD has been compared to a set of …

1993 • Space Science Reviews

eHST 1

The Decay Phase of the March-April, 1991 Low-Energy Particle Events Observed at Ulysses and Earth

DOI: 10.1016/0273-1177(93)90441-D Bibcode: 1993AdSpR..13j.299R

Simnett, G. M.; Lanzerotti, L. J.; Armstrong, T. P. +2 more

1993 • Advances in Space Research

Ulysses 0

Multiwavelength astronomy using ESIS

DOI: 10.1016/0273-1177(93)90172-8 Bibcode: 1993AdSpR..13l.621G

Giommi, P.; Ansari, S. G.

We present results on multi-frequency astronomy obtained using the European Space Information System, ESIS. ESIS is an ESA service designed to access, manipulate and combine archival data from a number of remote archives in the fields of Astronomy and Space Physics. The examples presented here include plots of radio-to-X-ray energy distribution of…

1993 • Advances in Space Research

Exosat IUE 0

Multiwavelength monitoring of active galactic nuclei

DOI: 10.1016/0273-1177(93)90167-A Bibcode: 1993AdSpR..13l.573U

Urry, C. M.

Recent multiwavelength monitoring of active galactic nuclei (AGN), particularly with the IUE satellite, has produced extraordinary advances in our understanding of the energy-generation mechanism(s) in the central engine and of the structure of the surrounding material. Examples discussed here include both ordinary AGN and blazars (the collective …

1993 • Advances in Space Research

IUE 0

Ion Abundances in Solar Event at 5.3 AU

Bibcode: 1993ICRC....3..379L

Tappin, S. J.; Lanzerotti, L. J.; Gold, R. E. +2 more

1993 • 23rd International Cosmic Ray Conference (ICRC23), Volume 3

Ulysses 0

Ulysses Observations of Solar Wind Proton and Alpha Particle Temperatures and Anisotropies from 1 to 5 AU

DOI: 10.1016/0273-1177(93)90427-D Bibcode: 1993AdSpR..13f.294G

McComas, D. J.; Goldstein, B. E.; Bame, S. J. +3 more

1993 • Advances in Space Research

Ulysses 0

Analysis of COS-B and HEAO-B satellite data of the pulsar Geminga

DOI: 10.1016/0275-1062(93)90038-Q Bibcode: 1993ChA&A..17...33M

Wu, Mei; Ma, Lin; Ma, Yu-qian +4 more

We have made timing and spectral analyses of COS-B and HEAO-B satellite data of the pulsar Geminga and our results further confirm that Geminga is a pulsar with a strong γ emission and a weak X emission.

1993 • Chinese Astronomy and Astrophysics

COS-B 0

Multiwavelength Searches for the Counterpart to the May 1 1992 Gamma-Ray Burst

Bibcode: 1993ICRC....1..116H

Cline, T.; Hurley, K.; Kouveliotou, C. +9 more

1993 • 23rd International Cosmic Ray Conference (ICRC23), Volume 1

Ulysses 0

UV and X-ray emission in the interacting binary U Cephei.

Bibcode: 1993A&AS...97..261G

Gonzalez-Riestra, R.; Guinan, E. F.; Gimenez, A.

The active close binary U Cep has been monitored in the ultraviolet, using IUE, during 1.25 orbital cycles. The emission spectrum at the bottom of the primary total eclipse confirms earlier suggestions of an unexpected absence of the Hell 1640 A line. Stronger than expected emission in some other lines like NV, CII, CIV or AlIII, indicative of hot…

1993 • Astronomy and Astrophysics Supplement Series

IUE 0

Search for short bursts of gamma-ray emission in spark chamber data: application to COS-B

Bibcode: 1993A&A...277..353B

Buccheri, R.; Maccarone, M. C.; Fry, W. F.

We describe an analysis method aimed to the detection of short (<1000 s) bursts in the emission of gamma-ray sources using spark chamber data. The method utilizes a maximum likelihood technique which looks for accumulations of photons, compatible with the point spread function of the experiment, within the whole observing time and the field-of-…

1993 • Astronomy and Astrophysics

COS-B 0