Zobrazeno 1 - 9
of 9
pro vyhledávání: '"Michiel Kolman"'
Autor:
Michiel Kolman
Publikováno v:
Information Services & Use. 39:383-385
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::820d51a7cc0cb68e962ddd4b0f232c1f
https://doi.org/10.3233/isu-180036
https://doi.org/10.3233/isu-180036
Autor:
Michiel Kolman
Publikováno v:
Information Services & Use. 37:269-270
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::959c217c2966dd66ac7ea09126ce6c01
https://doi.org/10.3233/isu-170838
https://doi.org/10.3233/isu-170838
Autor:
S. Schaeidt, Jules P. Halpern, Henner Fink, Chris Shrader, Alexei V. Filippenko, Michiel Kolman
Publikováno v:
Astrophysics and Space Science Library ISBN: 9789401043410
We report on the first simultaneous optical, UV, and X-ray spectroscopy of the low-redshift (z = 0.297), high-luminosity QSO H1821+643. This multiwavelength campaign was complemented by optical imaging and radio mapping with the VLA. Although there w
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4d910096039ae7311bc2ce5f2ff62f56
https://doi.org/10.1007/978-94-011-0794-5_115
https://doi.org/10.1007/978-94-011-0794-5_115
Publikováno v:
The Astrophysical Journal. 403:592
A possible connection between the variable X-ray and UV absorption features in NGC 3516 is presently investigated in view of simultaneous X-ray and UV observations. A common origin of the UV and X-ray absorption could not be established, due to the a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::32330c758181a1c0022f24b545865087
https://doi.org/10.1086/172230
https://doi.org/10.1086/172230
Autor:
S. Schaeidt, Alexei V. Filippenko, Jules P. Halpern, Michiel Kolman, Chris Shrader, Henner Fink
Publikováno v:
The Astrophysical Journal. 402:514
Simultaneous optical, UV, and X-ray spectroscopy of the low-redshift high-luminosity QSO H1821+643 is presented in order to examine the connection between the optical UV bump and the soft X-ray excess. The correlation of the short-term variability in
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::baba94bc28cd7c5f7ee3420de6ab871d
https://doi.org/10.1086/172153
https://doi.org/10.1086/172153
Autor:
Michiel Kolman
Publikováno v:
Publications of the Astronomical Society of the Pacific. 104:711
This thesis comprises extensive observational studies of two active galactic nuclei: the bright QSO H1821+643 and the Seyfert 1 galaxy NGC 3516. We report on the first simultaneous spectroscopy of the nearby (z = 0.297) QSO H1821+643 in teh optical,
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c9bba5869d43eaa73228d9e1a537e6e4
https://doi.org/10.1086/133041
https://doi.org/10.1086/133041
Publikováno v:
The Astrophysical Journal. 373:57
The first UV observations of the bright QSO H1821 + 643 are reported. With V = 14.2 mag and z = 0.297, H1821 + 643 is the second brightest object in the sky at z above 0.1. The IUE data are combined with new optical spectroscopy, and existing IR and
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::05f74a17308d3213162bb7da3c558963
https://doi.org/10.1086/170022
https://doi.org/10.1086/170022