Search Publications
The nature of the prompt X-ray and radio emission from SN 2002ap
Ray, A.; Bhatnagar, S.; Chandra, P. +1 more
We report on the combined X-ray and radio observations of the type Ic SN 2002ap, using XMM-Newton TOO observation of M 74 and the Giant Metrewave Radio Telescope (GMRT). We account for the presence of a nearby source in the pre-supernova Chandra field of view in our measurements of the X-ray flux (0.3 - 10 KeV) 5.2 days after the explosion. The X-…
XMM-Newton light curves of the low-mass X-ray binary EXO 0748-676: Dips, eclipses, and bursts
Wijnands, R.; van den Berg, M.; Homan, J.
We present an analysis of XMM-Newton light curves of the dipping, bursting, and eclipsing low-mass X-ray binary EXO 0748-676, focusing on the variability on time scales of seconds to hours. The observed variability can be roughly divided in three types: dips, eclipses and bursts. We find that the appearance of the latter two, depends strongly on t…
X-ray and optical properties of X-ray sources in the 13hr XMM-Newton/Chandra deep survey
Page, M. J.; Sasseen, T.; Mason, K. O. +8 more
The 13hr XMM-Newton/Chandra deep survey is the first of two extremely deep XMM-Newton fields observed by the XMM-OM consortium. A 120 ks Chandra mosaic, covering 0.2 deg2, provides sensitive, confusion-free point source detection with sub-arcsecond positions, while the 200 ks XMM-Newton observation provides high quality X-ray spectrosco…
New Laboratory Spectra of Isolated β-SiC Nanoparticles: Comparison with Spectra Taken by the Infrared Space Observatory
Mutschke, H.; Henning, Th.; Klein, R. +1 more
We present new laboratory infrared spectra of matrix-isolated β-SiC nanoparticles, which perfectly match the band profile of the 11+ µm feature observed in carbon stars. The new laboratory spectra differ in the shape of the band profile from former measurements of SiC nanoparticles thanks to the matrix-isolation technique which allows to obt…
The Star Formation History of Galaxies Measured from Individual Pixels. I. The Hubble Deep Field North
Hopkins, Andrew M.; Csabai, István; Connolly, Andrew J. +6 more
We analyze the photometric information contained in individual pixels of galaxies in the Hubble Deep Field North (HDF-N) using a new technique, pixel-z, that combines predictions of evolutionary synthesis models with photometric redshift template fitting. Each spectral energy distribution template is a result of modeling of the detailed physical p…
Imprints from the solar cycle on the helium atom and helium pickup ion distributions
Fahr, H. J.; Bzowski, M.; Rucinski, D.
Neutral interstellar helium atoms penetrate into the solar system almost unaffected by gas-plasma interactions in the heliospheric interface region, and thus can be considered as carriers of original information on the basic parameters (like density, temperature, bulk velocity) of the Very Local Interstellar Medium (VLISM). Such information can no…
Explanatory supplement of the ISOGAL-DENIS Point Source Catalogue
Alard, C.; Blommaert, J. A. D. L.; Ganesh, S. +10 more
We present version 1.0 of the ISOGAL-DENIS Point Source Catalogue (PSC), containing more than 100 000 point sources detected at 7 and/or 15 mu m in the ISOGAL survey of the inner Galaxy with the ISOCAM instrument on board the Infrared Space Observatory (ISO). These sources are cross-identified, wherever possible, with near-infrared (0.8-2.2 mu m) …
Diffuse X-Ray Emission from M101
Mukai, K.; Kuntz, K. D.; Snowden, S. L. +1 more
The total 0.45-1.0 keV luminosity of M101 is 3.2×1039 ergs s-1, of which 2.3×1039 ergs s-1 is due to diffuse emission. (Chandra observes only ~60% of the diffuse emission observed by ROSAT because of its superior point-source detection.) Of the diffuse emission seen by Chandra, no more than 6% can be due…
Elemental Abundances for the 1996 Streamer Belt
Wurz, P.; Raymond, J. C.; Uzzo, M. +2 more
The purpose of this paper is to explore the observed physical characteristics of the solar corona streamer belt from 1996 June 1 to August 5. The UV spectral data was collected by the Ultraviolet Coronagraph Spectrometer (UVCS) instrument on board the Solar and Heliospheric Observatory (SOHO) spacecraft. From this data the abundances of oxygen, si…
XMM-Newton observation of the ULIRG NGC 6240. The physical nature of the complex Fe K line emission
Costantini, E.; Hasinger, G.; Boller, Th. +5 more
We report on an XMM-Newton observation of the ultraluminous infrared galaxy NGC 6240. The 0.3-10 keV spectrum can be successfully modelled with: (i) three collisionally ionized plasma components with temperatures of about 0.7, 1.4, and 5.5 keV; (ii) a highly absorbed direct power-law component; and (iii) a neutral Fe Kalpha and Kbeta line. We dete…