Search Publications
High resolution X-ray spectroscopy of SN 1987 A: monitoring with XMM-Newton
Haberl, F.; Hasinger, G.; Sturm, R. +1 more
Context. The ongoing propagation of the supernova blast wave of SN 1987 A through its inner circumstellar ring has caused a drastic increase in X-ray luminosity in the past few years, which has allowed detailed high resolution X-ray spectroscopy to be performed with the Reflection Grating Spectrometer.
Aims: We report the results of our XMM-N…
A Far-infrared Characterization of 24 µm Selected Galaxies at 0 < z < 2.5 using Stacking at 70 µm and 160 µm in the COSMOS Field
Kartaltepe, Jeyhan S.; Sanders, D. B.; Frayer, D. T. +7 more
We present a study of the average properties of luminous infrared galaxies detected directly at 24 µm in the COSMOS field using a median stacking analysis at 70 µm and 160 µm. Over 35,000 sources spanning 0 <= z <= 3 and 0.06 mJy <=S 24 <= 3.0 mJy are stacked, divided into bins of both photometric redshift …
Multi-zone warm and cold clumpy absorbers in three Seyfert galaxies
Audard, M.; Ricci, C.; Courvoisier, T. J. -L. +1 more
Aims: We present the first detailed X-ray analysis of three active galactic nuclei, the Seyfert 1 galaxies UGC 3142 and ESO 140-43, and the Seyfert 2 galaxy ESO 383-18, to study the geometry and the physical characteristics of their absorbers.
Methods: High-quality XMM-Newton EPIC and RGS data were analyzed as well as Swift/XRT and BAT a…
The longest observation of a low-intensity state from a supergiant fast X-ray transient: Suzaku observes IGRJ08408-4503
Sidoli, L.; Esposito, P.; Ducci, L.
We report here on the longest deep X-ray observation of a supergiant fast X-ray transient (SFXT) outside outburst, with an average luminosity level of 1033 erg s-1 (assuming 3 kpc distance). This observation was performed with Suzaku in 2009 December and was targeted on IGRJ08408-4503, with a net exposure with the X-ray Imagi…
Cassini spectra and photometry 0.25-5.1 µm of the small inner satellites of Saturn
Brown, R. H.; Baines, K. H.; Buratti, B. J. +7 more
The nominal tour of the Cassini mission enabled the first spectra and solar phase curves of the small inner satellites of Saturn. We present spectra from the Visual Infrared Mapping Spectrometer (VIMS) and the Imaging Science Subsystem (ISS) that span the 0.25-5.1 µm spectral range. The composition of Atlas, Pandora, Janus, Epimetheus, Calyp…
Ultra Deep Akari Observations of Abell 2218: Resolving the 15 µm Extragalactic Background Light
Smail, I.; Kneib, J. -P.; Im, M. +11 more
We present extragalactic number counts and a lower limit estimate for the cosmic infrared background (CIRB) at 15 µm from AKARI ultra deep mapping of the gravitational lensing cluster Abell 2218. These data are the deepest taken by any facility at this wavelength and uniquely sample the normal galaxy population. We have de-blended our source…
Annihilation emission from young supernova remnants
Vink, J.; Diehl, R.; Jean, P. +2 more
Context. A promising source of the positrons that contribute through annihilation to the diffuse Galactic 511 keV emission is the β+-decay of unstable nuclei like 56Ni and 44Ti synthesised by massive stars and supernovae. Although a large fraction of these positrons annihilate in the ejecta of SNe/SNRs, no point-so…
The Soft X-ray and Narrow-line Emission of Mrk 573 on Kiloparsec Scales
Acosta-Pulido, J. A.; Gonzalez-Martin, O.; Ramos Almeida, C. +1 more
We present a study of the circumnuclear region of the nearby Seyfert galaxy Mrk 573 using Chandra, XMM-Newton, and Hubble Space Telescope (HST) data. We have studied the morphology of the soft (<2 keV) X-rays comparing it with the [O III] and Hα HST images. The soft X-ray emission is resolved into a complex extended region. The X-ray morphology…
A plasma flow velocity boundary at Mars from the disappearance of electron plasma oscillations
Gurnett, D. A.; Winningham, J. D.; Frahm, R. +2 more
The Mars Advanced Radar for Subsurface and Ionospheric Sounding (MARSIS) on the Mars Express (MEX) spacecraft is capable of measuring ionospheric electron density by the use of two main methods: remote radar sounding and from the excitation of local plasma oscillations. The frequency of the locally excited electron plasma oscillations is used to m…
Nothing to Hide: An X-ray Survey for Young Stellar Objects in the Pipe Nebula
Forbrich, Jan; Lada, Charles J.; Covey, Kevin R. +1 more
We have previously analyzed sensitive mid-infrared observations to establish that the Pipe Nebula (PiN) has a very low star formation efficiency. That study focused on young stellar objects (YSOs) with excess infrared emission (i.e., protostars and pre-main-sequence stars with disks), however, and could have missed a population of more evolved pre…