搜索结果: 1-13 共查到“天体物理学 Observation”相关记录13条 . 查询时间(0.379 秒)
Observation of the Cosmic Ray Moon shadowing effect with ARGO-YBJ
Observation Cosmic Ray Moon shadowing effect ARGO-YBJ
2011/10/19
Cosmic rays are hampered by the Moon and a deficit in its direction is expected (the so-called \emph{Moon shadow}). The Moon shadow is an important tool to determine the performance of an air shower a...
Multiwavelength campaign on Mrk 509. V. Chandra-LETGS observation of the ionized absorber
Galaxies: individual: Mrk 509 – Galaxies: Seyfert – quasars: absorption lines – X-rays: galaxies
2011/9/27
We present here the results of a 180 ks Chandra-LETGS observation as part of a large multi-wavelength campaign on Mrk 509. We study the warm absorber in Mrk 509 and use the data from a simultaneous HS...
A Suzaku Observation of MCG-2-58-22: Constraining the Geometry of the Circumnuclear Material
Galaxies: active – X-rays galaxies – Galaxies Individual
2011/8/24
We have analyzed a Suzaku long-look of the active galactic nucleus MCG-2-58-22, a type 1.5 Seyfert with very little X-ray absorption in the line of sight and prominent features arising from reflection...
Swift observation of Segue 1: constraints on sterile neutrino parameters in the darkest galaxy
Swift observation constraints on sterile neutrino parameters
2011/1/10
Some extensions of standard particle physics postulate that dark matter may be partially composed of weakly interacting sterile neutrino particles that have so far eluded detection. We use a short (~5...
A Chandra Observation of the Obscured Star-Forming Complex W40
Chandra Observation the Obscured Star-Forming Complex W40
2011/1/11
The young stellar cluster illuminating the W40 H II region, one of the nearest massive star forming regions, has been observed with the ACIS detector on board the Chandra X-ray Observatory. Due to its...
Sunyaev-Zel'dovich observation of the Bullet-like cluster A2146 with the Arcminute Microkelvin Imager
Sunyaev-Zel'dovich observation Bullet-like cluster Arcminute Microkelvin Imager
2010/11/9
We present 13.9 − 18.2-GHz observations of the Sunyaev-Zel’dovich (SZ) effect to-wards A2146 using the Arcminute Microkelvin Imager (AMI). The cluster is detected with a peak signal-to-noise rat...
GMRT observation towards detecting the Post-reionization 21-cm signal
GMRT the Post-reionization 21-cm signal
2011/1/10
We have analyzed 610 MHz GMRT observations towards detecting the redshifted 21-cm signal from z=1.32. The multi-frequency angular power spectrum C_l(Delta nu) is used to characterize the statistical p...
Importance of far-infrared mapping in a spiral galaxy: AKARI observation of M81
Cosmology and Extragalactic Astrophysics (astro-ph.CO)
2010/12/27
The importance of the far-infrared (FIR) mapping is demonstrated for a face-on spiral galaxy, M81, by analyzing its imaging data at 65, 90, and 140 {\mu}m taken by AKARI. Basic products are the dust t...
A deep Chandra observation of the poor cluster AWM4 - II. The role of the radio jets in enriching the intra-cluster medium
Cosmology and Extragalactic Astrophysics (astro-ph.CO)
2010/12/23
We use a Chandra observation of the poor cluster AWM4 to map the temperature and abundance of the intra-cluster medium, so as to examine the influence of the central radio galaxy on its environment.
AKARI observation of the fluctuation of the near-infrared background. I
Cosmology and Extragalactic Astrophysics (astro-ph.CO)
2010/12/23
We sought to detect fluctuations of brightness in the sky toward the north ecliptic pole (NEP) with the Japanese infrared astronomical satellite AKARI, at 2.4, 3.2, and 4.1 {\mu}m. The obtained circul...
Photometric Observation and Light Curve Analysis of Binary System ER-Orionis
Photoelectric photometry—eclipsing binaries—overcontact systems
2010/9/15
Photometric observations of the over-contact binary ER ORI were performed during November 2007 and February to April 2008 with the 51 cm telescope of Biruni Observatory of Shiraz University in U, B an...
A search for spectral features in the XMM-Newton observation of UGC 11763
spectral features UGC 11763 XMM-Newton observation
2009/7/9
A search for spectral features in the XMM-Newton observation of UGC 11763。
Lsst cloud cover measurement for observation scheduling。