Zobrazeno 1 - 7
of 7
pro vyhledávání: '"K. L. Hallam"'
Publikováno v:
The Astrophysical Journal. 372:610
Time-sequenced IUE spectra of a number of a bright F-K dwarfs have been used to investigate rotational modulation in several important chromospheric and transition emission lines. Stellingwerf's phase dispersion minimization (PDM) technique forms the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4b51abeb7a6eae83ee445d439f1c17ae
https://doi.org/10.1086/170005
https://doi.org/10.1086/170005
Autor:
E. H. Richardson, M. F. Walker, N. N. Mikhel’son, G. Wlérick, I. M. Kopylov, J. Ring, V. B. Nikonov, K. L. Hallam, A. B. Meinel, W. C. Livingston
Publikováno v:
Transactions of the International Astronomical Union. 16:19-30
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::07777f5d1ef245f117b7b89ece2c03f5
https://doi.org/10.1017/s0251107x00001863
https://doi.org/10.1017/s0251107x00001863
Publikováno v:
Optical Engineering. 17
The Atmospheric X-ray Emission Telescope (AXET) is designed to image and measure the spatial, temporal, and spectral distributions of X-ray aurorae produced in the upper atmosphere by precipitating energetic electrons. The bremsstrahlung-produced X r
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3d0957123574bada838a26753864be92
https://doi.org/10.1117/12.7972180
https://doi.org/10.1117/12.7972180
Publikováno v:
SPIE Proceedings.
A generalized approach is attempted to the problem of designing an image sensor that is to be used on a large spaceborne telescope. General design and performance goals are presented, and the parameters describing the sensor characteristics are discu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4e7670c0ed7f142625df35033bfa7fbf
https://doi.org/10.1117/12.953537
https://doi.org/10.1117/12.953537
Autor:
K. L. Hallam, C. L. Wolff
Publikováno v:
The Astrophysical Journal. 248:L73
Periodic variations in the ultraviolet fluxes of chromospheric emission line multiplets are investigated for F, G and K stars as evidence of rotational modulation. Vacuum ultraviolet spectra were obtained with the IUE spacecraft for six stars as many
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e136c84951f08a3a516d57789be77f20
https://doi.org/10.1086/183627
https://doi.org/10.1086/183627
Publikováno v:
Journal of Physics E: Scientific Instruments. 9:926-926
Points out the possibility of using a lens system involving electric and magnetic fields which has been used successfully to image electrons in an oblique electron multiplier array device (Johnson and Hallam 1973). The oblique nature of this crossed
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::fefbc0579bcc9833db9b583862eb04e8
https://doi.org/10.1088/0022-3735/9/11/008
https://doi.org/10.1088/0022-3735/9/11/008
Publikováno v:
Publications of the Astronomical Society of the Pacific. 71:239
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::de9882e72d3e94494fa76bbb1b2ef910
https://doi.org/10.1086/127374
https://doi.org/10.1086/127374