| タイトル | Ultraviolet observations of NGC 4395, the least luminous and nearest known Seyfert 1 nucleus |
| 本文（外部サイト） | http://hdl.handle.net/2060/19940009206 |
| 著者（英） | Filippenko, Alexei V. |
| 著者所属（英） | California Univ. |
| 発行日 | 1990-01-01 |
| 言語 | eng |
| 内容記述 | The purpose of the grant was to obtain and analyze International Ultraviolet Explorer (IUE) spectra of the spiral galaxy NGC 4395, which contains the nearest and least luminous known Seyfert nucleus. The ultraviolet (UV) spectra was to be used to test the intriguing hypothesis that the 'activity' could be explained by purely stellar phenomena, and to further explore the unprecedented properties of this nucleus. To test the feasibility of the project (the nucleus of NGC 4395 is very faint), one IUE shift was allocated, with the possibility of three additional shifts later on. Ultraviolet observations were attempted with IUE on 4 June 1989. Unfortunately, it was found that the only available guide star could no longer be detected sufficiently well with the FES, whose present sensitivity is lower than it was at the beginning of the IUE mission. Thus, it is no longer possible to observe NGC 4395 with IUE. Given these circumstances, as well as the faintness of the nucleus of NGC 4395, a Cycle 2 HST proposal for observations of this object was submitted. |
| NASA分類 | ASTRONOMY |
| レポートNO | 94N13679
NASA-CR-194304
NAS 1.26:194304 |
| 権利 | No Copyright |
|
