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The Astrophysical Journal, ISSN 0004-637X, 05/2007, Volume 660, Issue 2 I, pp. 1398 - 1408
We present results from an H alpha monitoring campaign of the Be X-ray binary systems HDE 245770 = A0535+ 26 and X Per. We use the H alpha equivalent widths... 
X-rays: binaries | Stars: neutron | Stars: emission-line, Be | SEARCH | BEHAVIOR | NEUTRON-STAR | A0535+26 | stars : emission-line, Be | stars : individual (A0535+26, HDE 245770,X Persei) stars : neutron | X-rays : binaries | PERIODICITIES | VARIABILITY | PHASE-CHANGES | ASTRONOMY & ASTROPHYSICS | ACCRETION | CIRCUMSTELLAR DISKS | RADIAL-VELOCITY
Journal Article
Astronomy and Astrophysics, ISSN 0004-6361, 2011, Volume 534, p. A39
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... 
Galaxies: nuclei | Galaxies: active | X-rays: galaxies | Galaxies: Seyfert | Quasars: individual: Mrk 509 | galaxies: Seyfert | AGN | quasars: individual: Mrk 509 | BLACK-HOLES | GALAXY | ACTIVE GALACTIC NUCLEI | galaxies: active | ASTRONOMY & ASTROPHYSICS | ULTRAVIOLET EXTINCTION | CONTINUUM | SPECTRUM | galaxies: nuclei | NGC 5548 | EMISSION | XMM-NEWTON
Journal Article
Monthly Notices of the Royal Astronomical Society, ISSN 0035-8711, 2013, Volume 433, Issue 1, pp. 740 - 745
We have discovered a ∼420-d modulation, with associated X-ray dips, in Rossi X-Ray Timing Explorer-All Sky Monitor/Monitor of All-Sky X-ray Image/Swift-Burst... 
X-rays:individual:swift J1753.5-0127 | WARPED ACCRETION DISCS | VARIABILITY | LOW/HARD STATE | BLACK-HOLE CANDIDATE | ASTRONOMY & ASTROPHYSICS | SUPERHUMPS | SIMULATIONS | LMXBS | X-rays: individual: Swift J1753 | 5-0127 | Physics - High Energy Astrophysical Phenomena
Journal Article
Astronomy and Astrophysics, ISSN 0004-6361, 2014, Volume 567, pp. A80 - np
Journal Article
Astronomy and Astrophysics, ISSN 0004-6361, 05/2005, Volume 434, Issue 2, pp. 569 - 584
We present the results from a 500 ks Chandra observation of the Seyfert 1 galaxy NGC 5548. We detect broadened ( full width half maximum = 8000 km s(-1))... 
Quasars: individual: NGC 5548 | Galaxies: active | X-rays: galaxies | Galaxies: Seyfert | BLACK-HOLE | COLUMN DENSITY | X-rays : galaxies | VARIABILITY | ACTIVE GALACTIC NUCLEI | ASTRONOMY & ASTROPHYSICS | IONIZED-GAS | CHANDRA | ULTRAVIOLET ABSORBER | quasars : individual : NGC 5548 | NGC 5548 | galaxies : active | XMM-NEWTON | NGC-3783 | galaxies : Seyfert
Journal Article
Monthly Notices of the Royal Astronomical Society, ISSN 0035-8711, 2011, Volume 414, Issue 2, pp. 1508 - 1516
Journal Article