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A Super Bubble Candidate in the Galactic Center and a Local Enhancement G359.77-0.09
Mori, Hideyuki; Koyama, Katsuji; Nobukawa, Masayoshi +2 more
A 20' × 16' elliptical ring-like structure has been found near the Galactic center in the narrow energy band corresponding to the Kα line from He-like sulfur. In the ring, two diffuse sources are found, a supernova remnant candidate, G359.79-0.26, and an unidentified source, G359.77-0.09. The X-ray spectrum of G359.77-0.09 is similar to that of G3…
Deconvolution of Images Taken with the Suzaku X-Ray Imaging Spectrometer
Maeda, Yoshitomo; Kamae, Tuneyoshi; Sugizaki, Mutsumi
We present a non-iterative method to deconvolve the point spread function (PSF) from images taken with the Suzaku X-ray Imaging Spectrometer (XIS). The method is optimized for analyses of extended sources with high photon statistics. Suzaku has four XIS detectors, each with its own X-ray CCD and X-Ray Telescope (XRT), and has been providing opport…
Interstellar Medium in the M43 Nebula
Gnaciñski, P.
We present a list of interstellar absorption lines in the direction of HD 37061 in the M43 nebula. Some of the absorption lines arise from atomic excited levels that are uncommon in interstellar clouds. The excited levels of FeII are populated by fluorescence. We found a large number of H2 molecular absorption lines arising from vibrati…
Post-Eruptive Arcade Formation in the 25 January 2007 CME/Flare Limb Event: Microwave Observations with the RATAN-600 Radio Telescope
Abramov-Maximov, V. E.; Grigoryeva, I. Y.; Borovik, V. N. +4 more
A CME/flare event occurred at the eastern limb on 25 January, 2007. Seven successive multi-wavelength scans in the range 1.8 cm - 5.0 cm were obtained with the RATAN-600 radio telescope starting just at the beginning of the post-eruptive arcade formation (30 min after a C6.3 flare peak) and lasting for 3.5 hours. The conditions were favorable to s…
The He II Lines in the Lyman Series Profiles of Solar Prominences
Vial, J. -C.; Ajabshirizadeh, A.; Ebadi, H.
The hydrogen and helium lines are the most prominent lines in the solar prominences spectra. Observations with the SUMER spectrometer onboard SOHO showed that there are weak lines in the blue wings of the Lyman series which affect their profiles. They were all identified as He II lines in the Lyman series wings, except for the Lα line whose profil…
Timing and spectral properties of the X-ray emission from the blazar 1ES 1426+428
Fidelis, V. V.; Yakubovskyi, D. A.; Voytkova, Yu. V.
Most of the extragalactic sources from which very-high-energy (VHE, E > 1011 eV) gamma-ray fluxes have been detected belong to the category of high-energy peaked BL Lacertae objects (HBLs)—the sources in which the synchrotron radiation peaks in the UV or X-ray band. They often have higher X-ray luminosities than the VHE gamma-ray ene…
Markov properties of solar granulation
Asensio Ramos, A.
Aims: We estimate the minimum length on which solar granulation can be considered to be a Markovian process.
Methods: We measure the variation in the bright difference between two pixels in images of the solar granulation for different distances between the pixels. This scale-dependent data is empirically analyzed to find the minimum scale on …
A deep XMM-Newton serendipitous survey of a middle-latitude area. II. New deeper X-ray and optical observations
Caraveo, P. A.; de Luca, A.; Schirmer, M. +4 more
Context: The radio-quiet neutron star 1E1207.4-5209 has been the target of several XMM-Newton observations, with a total exposure of ~350 ks. The source is located at intermediate galactic latitude (b ∼ 10°), i.e. in a sky region with an extremely interesting mix of both galactic and extra-galactic X-ray sources.
Aims: The aim of our work is t…
GRS 1915+105: high-energy insights with SPI/INTEGRAL. Spectral analysis of the Comptonized emission
Jourdain, E.; Droulans, R.
Context: We report on results of nearly two years of INTEGRAL/SPI monitoring of the Galactic microquasar GRS 1915+105.
Aims: From September 2004 to May 2006, the source was observed twenty times with long (~100 ks) exposures. We present an analysis of the SPI data and focus on the description of the high-energy (>20 keV) output of the sourc…
Deconstructing Active Region AR10961 Using STEREO, Hinode, TRACE, and SOHO
Walsh, Robert W.; Marsh, M. S.; Noglik, Jane B. +1 more
Active region 10961 was observed over a five-day period (2007 July 2-6) by instrumentation on-board STEREO, Hinode, TRACE, and SOHO. As it progressed from Sun's center to the solar limb, a comprehensive analysis of the extreme ultraviolet, X-ray, and magnetic field data reveals clearly observable changes in the global nature of the region. Tempera…