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The XMM-Newton/Chandra monitoring campaign of the Galactic center region
Accretion accretion disks
2014/12/24
We present the first results of our X-ray monitoring campaign on a 1.7 square degree region centered on Sgr A* using the satellites XMM-Newton and Chandra. The purpose of this campaign is to monitor t...
Delta Scorpii 2011 periastron: worldwide observational campaign and preliminary photometric analysis
Delta Scorpii Diff erential Photometry
2011/9/28
Delta Scorpii is a double giant Be star in the forefront of the Scorpio, well visible to the naked eye, being normally of magnitude 2.3. In the year 2000 its luminosity rose up suddenly to the magnitu...
Multiwavelength campaign on Mrk 509. VI. HST/COS observations of the far-ultraviolet spectrum
Galaxies: Active – Galaxies: Individual (Mrk 509) – Galaxies: Quasars: Absorption Lines – Galaxies: Seyfert –Ultraviolet: Galaxies – X-Rays: Galaxies
2011/9/27
We present medium resolution (R~20,000) HST/COS ultraviolet spectra covering 1155-1760 A of the Seyfert 1 Mrk 509 obtained simultaneously with a Chandra/LETGS spectrum as part of a multiwavelength cam...
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...
Multiwavelength campaign on Mrk 509. IV. Optical-UV-X-ray variability and the nature of the soft X-ray excess
galaxies: active – galaxies: nuclei – galaxies: Seyfert – quasars: individual: Mrk 509 – X-rays: galaxies
2011/9/27
We present the analysis of XMM-Newton and Swift optical-UV and X-ray observations of the Seyfert-1/QSO Mrk 509, part of an unprecedented multi-wavelength campaign, investigating the nuclear environmen...
Multiwavelength campaign on Mrk 509. III. The 600 ks RGS spectrum: unravelling the inner region of an AGN
Active Galactic Nuclei – X-ray spectroscopy – XMM-Newton – outfl ows – individual: Mrk 509 – galaxies: Seyfert
2011/9/27
We present the results of our 600 ks RGS observation as part of the multiwavelength campaign on Mrk 509. The very high quality of the spectrum allows us to investigate the ionized outflow with an unpr...
Multiwavelength campaign on Mrk 509. II. Analysis of high-quality Reflection Grating Spectrometer spectra
Galaxies: active – quasars: absorption lines – X-rays: general
2011/9/27
We study the bright Seyfert 1 galaxy Mrk~509 with the Reflection Grating Spectrometers (RGS) of XMM-Newton using the RGS multi-pointing mode of XMM-Newton for the first time in order to constrain the ...
Multiwavelength campaign on Mrk 509. I. Variability and spectral energy distribution
Galaxies: active – quasars: absorption lines – X-rays: general
2011/9/27
(Abridged) Active galactic nuclei show a wealth of interesting physical processes, some of which are poorly understood. We want to address a number of open questions, including the location and physic...
A Site Evaluation Campaign for a Ground Based Atmospheric Cherenkov Telescope in Romania
site testing gamma-ray Cherenkov telescopes very high energy gamma rays
2010/11/15
Around the world, several scientific projects share the interest of a global network of small Cherenkov telescopes for monitoring observations of the brightest blazars - the DWARF network. A small, gr...
A multi-site campaign to measure solar-like oscillations in Procyon. II. Mode frequencies
stars individual (Procyon A) stars oscillations
2010/3/9
We have analyzed data from a multi-site campaign to observe oscillations in the F5 star Procyon. The data consist of high-precision velocities that we obtained over more than three weeks with eleven t...
NASA Supports the President's Educate to Innovate Campaign with Summer of Innovation to Bring Students the Universe
NASA the President's Educate the Universe Students
2010/1/11
NASA has launched an initiative to use its out-of-this-world missions and technology programs to boost summer learning, particularly for underrepresented students across the nation. NASA's Summer of I...
Recent Site Testing Campaign at the Observatorio Astronómico Nacional in San Pedro Mártir
San Pedro Mártir Observatorio Astronómico Nacional
2009/6/9
Recent Site Testing Campaign at the Observatorio Astronómico Nacional in San Pedro Mártir。