Zobrazeno 1 - 10
of 20
pro vyhledávání: '"H. Barwig"'
Autor:
I. L Andronov, V. Burwitz, K. Reinsch, H. Barwig, L. L. Chinarova, S. V. Kolesnikov, N. M. Shakhovskoy, V. Hambaryan, K. Beuermann, D. A. Yuhanov
Publikováno v:
Odessa Astronomical Publications, Vol 16, Iss 0, Pp 7-10 (2017)
In this paper, we present the results of a study of the variability of the prototype polar AM Her using one of the complementary mathematical methods. Results of modeling of the auto-correlation analysis of a 24117 second long Chandra observation are
Externí odkaz:
https://doaj.org/article/b39d8cbd78154af1a8ffc361e2284dd9
Publikováno v:
Astronomy & Astrophysics. 428:181-190
NN Ser is known to be a 17 mag pre-cataclysmic binary consisting of a hot white dwarf and a cool late type star orbiting each other with a period of 3$^{{\rm h}}$ 7$^{{\rm m}}$. The system shows very deep eclipses and a pronounced reflection effect.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b7c1b4e824736130c52b90be21550d04
https://doi.org/10.1051/0004-6361:20041397
https://doi.org/10.1051/0004-6361:20041397
Time-resolved photometry and spectroscopy of the new deeply-eclipsing SW Sextantis star HS 0728+6738
Publikováno v:
Astronomy & Astrophysics. 424:647-655
We present time-resolved optical spectroscopy and photometry, and far-ultraviolet spectroscopy of HS 0728+6738, a cataclysmic variable discovered in the Hamburg Quasar Survey. We show that the system is a new eclipsing member of the SW Sex class of C
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::01162c95dd56edaccb6468124e81d1c0
https://doi.org/10.1051/0004-6361:20040408
https://doi.org/10.1051/0004-6361:20040408
Publikováno v:
International Astronomical Union Colloquium. 136:172-178
We present the design of a new 4 channel, fiberoptic spectrophotometer which allows to measure the object, two comparison stars and sky background simultaneously throughout the whole optical wavelength range with high efficiency. The overall spectral
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c1e032741240959507e4c291612162d3
https://doi.org/10.1017/s0252921100007533
https://doi.org/10.1017/s0252921100007533
Publikováno v:
Astrophysics and Space Science. 204:199-204
Photometric and spectroscopic observations of the poorly documented cataclysmic variable 1329-294 are presented. No definite period neither on a long nor on a short time scale could be derived from the photometric data. The radial velocity curve of t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3171eb8171633b1081cf7db2277405ca
https://doi.org/10.1007/bf00658024
https://doi.org/10.1007/bf00658024
Publikováno v:
Flares and Flashes ISBN: 9783540600572
An analysis of optical, radio and X-ray observations of the flare of December 31, 1991 on UV Ceti is presented. Radio spikes at 4750 GHz are interpreted in terms of both ECM and plasma emission. Resulting parameters of the flare plasma are discussed.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::57eaf547d3b19392c89c7125b4d7a4f1
https://doi.org/10.1007/3-540-60057-4_244
https://doi.org/10.1007/3-540-60057-4_244
Autor:
O. Giannakis, E. T. Harlaftis, P. G. Niarchos, S. Kitsionas, H. Barwig, M. Still, R. G. M. Rutten
Publikováno v:
Close Binaries in the 21st Century: New Opportunities and Challenges ISBN: 9781402050268
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b4039e45d3571d8b59e0833251469dcf
https://doi.org/10.1007/978-1-4020-5027-5_80
https://doi.org/10.1007/978-1-4020-5027-5_80
Publikováno v:
Lecture Notes in Physics ISBN: 9783540613909
We present time resolved UBVRI photometry of RX J0019.8+2156 which we performed with a multi-channel-photometer from 1992 to 1995. The light curves we received show regular and irregular brightness variations. Prominent cyclic depressions of 0.5 mag
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c01498f30680021274930ae460a7c05c
https://doi.org/10.1007/bfb0102251
https://doi.org/10.1007/bfb0102251
Autor:
D. Simic, N. V. Borisov, K. H. Mantel, H. Barwig, V. V. Neustroev, A. Bobinger, Sebastian Wolf
We present the results of spectral investigations of the cataclysmic variable IP Peg in quiescence. Optical spectra obtained on the 6-m telescope at the Special Astrophysical Observatory (Russia), and on the 3.5-m telescope at the German-Spanish Astr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::009951f0fd63a7fd4b526f31b6ad8987
http://arxiv.org/abs/astro-ph/0207418
http://arxiv.org/abs/astro-ph/0207418
Autor:
P. G. Niarchos, Martin Still, H. Barwig, Omiros Giannakis, E. T. Harlaftis, S. Kitsionas, R. G. M. Rutten
Publikováno v:
Astrophysics and Space Science. 304:321-322
We report the results of simultaneous optical/Xray observations of X1822-371 at 0.1 second time resolution. The preliminary analysis finds no correlation between the optical/X-ray light curves. We aim to constrain the vertical structure and radius of
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1c85468e697f8c1acaf2c50f4220b958
https://doi.org/10.1007/s10509-006-9142-8
https://doi.org/10.1007/s10509-006-9142-8