Zobrazeno 1 - 10
of 10
pro vyhledávání: '"B. R. Zeiger"'
Autor:
B. R. Zeiger, Jeremy Darling
Publikováno v:
The Astrophysical Journal. 709:386-395
We report new observations of the 110-111 (6 cm) and 211-212 (2 cm) transitions of ortho-formaldehyde (o-H2CO) in absorption at z=0.68466 toward the gravitational lens system B0218+357. Radiative transfer modeling indicates that both transitions are
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5c39e02382be0faec865698b25347493
https://doi.org/10.1088/0004-637x/709/1/386
https://doi.org/10.1088/0004-637x/709/1/386
Autor:
René Hudec, L. Sveda, Ladislav Pina, D. Cerna, V. Marsikova, V. Tichy, Thomas Rogers, J. Marsik, Webster Cash, Ann F. Shipley, B. R. Zeiger, A. Inneman
Publikováno v:
SPIE Proceedings.
A novel design of X-ray optical system - concentrator for astrophysical rocket experiment is investigated. The proposed system is based on four modules with Kirkpatrick-Baez (KB) configuration allowing usage of multi-foil mirrors arranged to paraboli
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a1c2c11fb5559c91f2a4d90440715526
https://doi.org/10.1117/12.2023984
https://doi.org/10.1117/12.2023984
Autor:
V. Tichy, A. Inneman, V. Marsikova, D. Cerna, Ladislav Pina, Ann F. Shipley, J. Marsik, Webster Cash, René Hudec, B. R. Zeiger, Thomas Rogers
Publikováno v:
SPIE Proceedings.
In this work, we investigate a novel design of optical system for astrophysics. In addition, a new testing method in the X-ray laboratory was verified. The proposed optical system is composed of modules with Kirkpatrick-Baez configuration allowing us
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::292a6b3d4b82fd1d9cf50e6b462f36f6
https://doi.org/10.1117/12.2017205
https://doi.org/10.1117/12.2017205
Autor:
Ann F. Shipley, A. Inneman, V. Marsikova, V. Tichy, D. Cerna, Webster Cash, René Hudec, J. Marsik, B. R. Zeiger, Ladislav Pina, R. Melich, Thomas Rogers
Publikováno v:
SPIE Proceedings.
In this work, we investigate a novel design of optical system for astrophysics. In addition, a new testing method in the X-ray laboratory was verified. The proposed optical system is composed of modules with Kirkpatrick-Baez configuration allowing us
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1529b1b854ebc46e5311bcc17941459b
https://doi.org/10.1117/12.929591
https://doi.org/10.1117/12.929591
Autor:
Jeremy Darling, B. R. Zeiger
We examine the absorption of cosmic microwave background (CMB) photons by formaldehyde (H2CO) over cosmic time. The K-doublet rotational transitions of H2CO become "refrigerated" - their excitation temperatures are driven below the CMB temperature -
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2636302465593ff0dc0d65ad9e4c5b8d
http://arxiv.org/abs/1204.0145
http://arxiv.org/abs/1204.0145
Autor:
B. R. Zeiger, Michael J. Kaiser, Thomas Rogers, Randall L. McEntaffer, Ted Schultz, Webster Cash, Ann F. Shipley
Publikováno v:
SPIE Proceedings.
We present the CODEX sounding rocket payload, a soft x-ray (0.1-1.0 keV) spectrometer designed to observe diffuse high-surface brightness astronomical sources. The payload is composed of two modules, each with a 3.25° x 3.25° field of view defined
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4c66e2cbfad0f7b41cd9e115de20a56d
https://doi.org/10.1117/12.887058
https://doi.org/10.1117/12.887058
Autor:
Webster Cash, René Hudec, Ladislav Pina, B. R. Zeiger, V. Marsikova, A. Inneman, Ann F. Shipley, J. Marsik
Publikováno v:
SPIE Proceedings.
We report on preliminary results of full aperture X-ray optical tests at the X-ray test facility at the University of Colorado (USA) of four test modules of Kirkpatrick-Baez (KB) X-ray optical systems performed in August 2010. Direct experimental com
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b4b225326814193a107fef19132b3db5
https://doi.org/10.1117/12.890517
https://doi.org/10.1117/12.890517
Publikováno v:
Space Telescopes and Instrumentation 2010: Ultraviolet to Gamma Ray.
We describe the experimental apparatus in use to test an off-plane reflection grating for the soft x-ray (0.3-1.0 keV) bandpass. The grating is a prototype for the X-ray Grating Spectrometer on the International X-ray Observatory (IXO). It has hologr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::cc9f8d8c226c5620e12aaa1edd5fea7c
https://doi.org/10.1117/12.857503
https://doi.org/10.1117/12.857503
Autor:
C. Lillie, T. Johnson, Simeon Barber, Peter J. Pool, Dean Dailey, Rolf Danner, Mat Page, B. R. Zeiger, Randall L. McEntaffer, D. Willingale, Ann F. Shipley, Webster Cash, Andrew D. Holland, Suzanne Casement, James Endicott, Neil J. Murray, Ted Schultz, James H. Tutt, D. Walton, R. D. Harriss
Publikováno v:
Space Telescopes and Instrumentation 2010: Ultraviolet to Gamma Ray.
The International X-ray Observatory (IXO) is a collaborative effort between NASA, ESA, and JAXA. The IXO science goals are heavily based on obtaining high quality X-ray spectra. In order to achieve this goal the science payload will incorporate an ar
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d0d1e91ced8cf1028bc136c884699792
https://doi.org/10.1117/12.857460
https://doi.org/10.1117/12.857460
Over the last decade, considerable effort has been made to measure the proper motions of the pulsars B1757-24 and B1951+32 in order to establish or refute associations with nearby supernova remnants and to understand better the complicated geometries
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::93348b0c92ae7229556388e820013192