Science Archives Publication System

The EXOSAT and Einstein observations of 1E0630 + 178 ('Geminga') as complementary data sets

DOI: 10.1007/BF02573800 Bibcode: 1984NCimC...7..741S

Caraveo, P. A.; Bignami, G. F.; Mereghetti, S. +1 more

Data for the soft X-ray source 1E0630 + 178 are now available from four independent measurements of the Einstein and EXOSAT missions. These are presented and compared in the light of the different characteristics and energy response of the different X-ray imaging detectors used (IPC, LE 1, LE 2). The time variability on medium (hours) time scale i…

1984 • Nuovo Cimento C Geophysics Space Physics C

Exosat 0

CA II K emission in Canopus.

Bibcode: 1984BASI...12..196B

Bappu, M. K. V.; Mekkaden, M. V.; Rao, N. K.

The changes in the Ca II K line profile of the F0 supergiant Canopus have been studied from the high dispersion coude spectrograms obtained since 1975. The emission in the core of the line is variable in a timescale of few days. Similar activity seems to be occurring in Mg II h and k lines also. This is attributed to the variability in the appeara…

1984 • Bulletin of the Astronomical Society of India

IUE 0

Three gamma-ray sources with large angular sizes

DOI: 10.1016/0275-1062(84)90048-1 Bibcode: 1984ChJSS...4...72L

Li, T. -P.

From an analysis of the data from the gamma-ray satellite COS-B and from radio measurements of CO molecules, it appears probable that the three gamma-ray sources 2CG 036+01, 218-00, 235-01 are either isolated giant molecular clouds or superpositions of clouds unresolved by the detector.

1984 • Chinese Journal of Space Science

COS-B 0

An ultraviolet identification list for the AP star IOTA Cassiopeiae.

Bibcode: 1984AcA....34..463J

Jasinski, M.; Woszczyk, A.

The authors present a detailed identification of the absorption lines in the ultraviolet spectrum of ι Cas. The list contains 412 lines. The identified lines belong mainly to iron and chromium. Also many lines of manganese are present.

1984 • Acta Astronomica

IUE 0

Background-sensitive event selection in the search for gamma-ray sources

DOI: 10.1016/0273-1177(84)90070-X Bibcode: 1984AdSpR...3j..95O

Özel, M. E.; Mayer-Haßelwander, H. A.

Poor angular resolution of present day gamma ray telescopes (1° at 100 MEV) together with the complicated gamma ray sky structures at compareable angular extents and poor statistics available necessitate the selection of those gammas which will increase the observable signal from a suspected source. A method for such a selection using the pre-know…

1984 • Advances in Space Research

COS-B 0

Exosat observations of the supernova remnant W49B.

Bibcode: 1984Obs...104..213J

Jones, L. R.

1984 • The Observatory

Exosat 0

The transition layer of eleven late-type stars.

Bibcode: 1984A&A...138..164F

Montesinos, B.; Rego, M.; Fernandez-Figueroa, M. J.

Far UV-spectra of eleven F, G, and K stars of different luminosity class have been studied. Si IV, C IV, and N V emission line fluxes have been used to obtain parameters for the transition region. The stars of the sample have been classified according to the activity level. Using two abundance criteria the gaseous pressure upper limits have been c…

1984 • Astronomy and Astrophysics

IUE 0

Evidence for an increasing 59 S period in the X-ray emission from Geminga

DOI: 10.1007/BF02573802 Bibcode: 1984NCimC...7..756B

Caraveo, P. A.; Bignami, G. F.; Salotti, L.

Einstein Observatory and EXOSAT X-ray data from 1E0630 + 178 reveal an approximately 50-percent periodic emission at about 59 s or more. This confirms the early SAS-II and COS-B findings on 2CG 195 + 04 at E greater than 50 MeV and provides the temporal signature for the identification of Geminga. The observations, spanning over a decade (1973-198…

1984 • Nuovo Cimento C Geophysics Space Physics C

Exosat 0

The EXOSAT mission - Status and early results

DOI: 10.1016/0273-1177(84)90135-2 Bibcode: 1984AdSpR...3j.485A

Taylor, B. G.; Peacock, A.; Andresen, R. D.

The status of the EXOSAT programme, during the calibration and performance verification phase, is summarised and some highlight results from this phase are presented.

1984 • Advances in Space Research

Exosat 0

X-ray astronomy: Milestone for EXOSAT

DOI: 10.1038/308315a0 Bibcode: 1984Natur.308..315W

Watson, Mike

1984 • Nature

Exosat 0