We present the results of searches for EUV emission from neutron stars conducted with the EUVE De... more We present the results of searches for EUV emission from neutron stars conducted with the EUVE Deep Survey and Scanner Telescopes. To date, 21 fields containing known neutron stars have been observed in the Lexan/Boron (40--190 angstrom) band. Of these, 11 fields were simultaneously observed in the Aluminum/Carbon (160-385 angstrom) band. Five neutron stars which have been detected in the EUV have been reported previously; no new detections have been made in the studies reported here. For those sources not detected, we have used the observations to obtain limits on the spectral flux from the neutron stars in these bands. We provide means to convert these fluxes into intrinsic source fluxes for black-body and power law spectra for varying levels of absorption by the interstellar medium.
The paper discusses a star with RS CVn-type characteristics discovered as a result of an accurate... more The paper discusses a star with RS CVn-type characteristics discovered as a result of an accurate X-ray location. The RS CVn binaries have been found to be a new class of soft X-ray sources from the HEAO 1 low energy sky survey. The source was detected at energies below 1 keV and evidence is presented for variability on time scales
Various papers on grazing incidence optics (GIO) for astronomical and laboratory applications are... more Various papers on grazing incidence optics (GIO) for astronomical and laboratory applications are presented. The general topics considered include: assessment of GIO, metal optics, new applications of GIO, high throughput optics, high-resolution optics, mirrors for synchrotron studies, design of GIO, errors in GIO, and reflectivity at grazing incidence. Individual topics addressed include: surface texture and imaging quality of mirrors, mirror
... TEMPERATURES FROM FAR-ULTRAVIOLET CONTINUUM FLUXES DAVID S. FINLEY Center for EUV Astrophysic... more ... TEMPERATURES FROM FAR-ULTRAVIOLET CONTINUUM FLUXES DAVID S. FINLEY Center for EUV Astrophysics, University of California, Berkeley GIBOR BASRI Astronomy Department, University of California, Berkeley AND STUART BOWYER Astronomy Department and ...
Observations of a diffuse ultraviolet background at high galactic latitude might reveal the exist... more Observations of a diffuse ultraviolet background at high galactic latitude might reveal the existence of an inter-galactic medium. Although existing results provide only weak constraints, current techniques are sufficient to set interesting limits on its density and temperature.
During the Apollo-Soyuz Test Project, an extreme-ultraviolet photometer with a cyclically operate... more During the Apollo-Soyuz Test Project, an extreme-ultraviolet photometer with a cyclically operated helium gas-absorption cell observed the daytime sky from an orbital altitude of 225 km. When the line of sight pointed more than 60 deg from the sun, the instrument detected 2 to 70 rayleighs of flux scattered from neutral geocoronal helium at wavelengths from 504 to 584 A. The instrument also detected other radiation in the band 500-700 A of similar spatial distribution to the helium flux, which was definitely not due to the He I 584-A spectral line and which has not been detected by previous experimenters in data from 400 km altitude. Possible sources of this radiation are discussed.
THE ASTROPHYSICAL JOURNAL, 169 :L23-L25, 1971 October 1 ~ 1971. The University of Chicago. All ri... more THE ASTROPHYSICAL JOURNAL, 169 :L23-L25, 1971 October 1 ~ 1971. The University of Chicago. All rights reserved. Printed in USA A PULSING X-RAY SOURCE IN CIRCINUS BRUCE MARGON, MICHAEL LAMPTON, STUART BOWYER, AND RAY CRUDDACE Department ...
We present the results of searches for EUV emission from neutron stars conducted with the EUVE De... more We present the results of searches for EUV emission from neutron stars conducted with the EUVE Deep Survey and Scanner Telescopes. To date, 21 fields containing known neutron stars have been observed in the Lexan/Boron (40--190 angstrom) band. Of these, 11 fields were simultaneously observed in the Aluminum/Carbon (160-385 angstrom) band. Five neutron stars which have been detected in the EUV have been reported previously; no new detections have been made in the studies reported here. For those sources not detected, we have used the observations to obtain limits on the spectral flux from the neutron stars in these bands. We provide means to convert these fluxes into intrinsic source fluxes for black-body and power law spectra for varying levels of absorption by the interstellar medium.
The paper discusses a star with RS CVn-type characteristics discovered as a result of an accurate... more The paper discusses a star with RS CVn-type characteristics discovered as a result of an accurate X-ray location. The RS CVn binaries have been found to be a new class of soft X-ray sources from the HEAO 1 low energy sky survey. The source was detected at energies below 1 keV and evidence is presented for variability on time scales
Various papers on grazing incidence optics (GIO) for astronomical and laboratory applications are... more Various papers on grazing incidence optics (GIO) for astronomical and laboratory applications are presented. The general topics considered include: assessment of GIO, metal optics, new applications of GIO, high throughput optics, high-resolution optics, mirrors for synchrotron studies, design of GIO, errors in GIO, and reflectivity at grazing incidence. Individual topics addressed include: surface texture and imaging quality of mirrors, mirror
... TEMPERATURES FROM FAR-ULTRAVIOLET CONTINUUM FLUXES DAVID S. FINLEY Center for EUV Astrophysic... more ... TEMPERATURES FROM FAR-ULTRAVIOLET CONTINUUM FLUXES DAVID S. FINLEY Center for EUV Astrophysics, University of California, Berkeley GIBOR BASRI Astronomy Department, University of California, Berkeley AND STUART BOWYER Astronomy Department and ...
Observations of a diffuse ultraviolet background at high galactic latitude might reveal the exist... more Observations of a diffuse ultraviolet background at high galactic latitude might reveal the existence of an inter-galactic medium. Although existing results provide only weak constraints, current techniques are sufficient to set interesting limits on its density and temperature.
During the Apollo-Soyuz Test Project, an extreme-ultraviolet photometer with a cyclically operate... more During the Apollo-Soyuz Test Project, an extreme-ultraviolet photometer with a cyclically operated helium gas-absorption cell observed the daytime sky from an orbital altitude of 225 km. When the line of sight pointed more than 60 deg from the sun, the instrument detected 2 to 70 rayleighs of flux scattered from neutral geocoronal helium at wavelengths from 504 to 584 A. The instrument also detected other radiation in the band 500-700 A of similar spatial distribution to the helium flux, which was definitely not due to the He I 584-A spectral line and which has not been detected by previous experimenters in data from 400 km altitude. Possible sources of this radiation are discussed.
THE ASTROPHYSICAL JOURNAL, 169 :L23-L25, 1971 October 1 ~ 1971. The University of Chicago. All ri... more THE ASTROPHYSICAL JOURNAL, 169 :L23-L25, 1971 October 1 ~ 1971. The University of Chicago. All rights reserved. Printed in USA A PULSING X-RAY SOURCE IN CIRCINUS BRUCE MARGON, MICHAEL LAMPTON, STUART BOWYER, AND RAY CRUDDACE Department ...
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