A5040016313- Galaxies: Formation, Evolution, Phenomena
- Gamma-ray bursts and supernovae
- Astrophysical Phenomena and Observations
- Soil Moisture and Remote Sensing
- Stellar, planetary, and galactic studies
- Underwater Acoustics Research
- Astronomy and Astrophysical Research
- Astrophysics and Star Formation Studies
- Astrophysics and Cosmic Phenomena
- Indoor and Outdoor Localization Technologies
- Radio Astronomy Observations and Technology
- Optical Systems and Laser Technology
- Pulsars and Gravitational Waves Research
- Adaptive optics and wavefront sensing
- Astronomical Observations and Instrumentation
- Ocular and Laser Science Research
- Geophysics and Gravity Measurements
Max Planck Institute for Extraterrestrial Physics
2015-2020
Max Planck Society
2015-2017
Optica
2015-2016
We present a detailed characterization of the 849 broad-line quasars from Sloan Digital Sky Survey Reverberation Mapping (SDSS-RM) project. Our quasar sample covers redshift range 0.1<z<4.5 and is flux-limited to i_PSF<21.7 without any other cuts on properties. The main includes: 1) spectral measurements continuum broad emission lines for individual objects coadded first-season spectroscopy in 2014; 2) identification narrow absorption spectra; 3) optical variability properties multi-epoch...
[Abbreviated] We search for scaling relations between the fundamental AGN parameters and rest-frame UV/optical variability properties a sample of $\sim$90 X-ray selected AGNs covering wide redshift range from XMM-COSMOS survey, with optical light curves in four bands provided by Pan-STARRS1 (PS1) Medium Deep Field 04 survey. To estimate amplitude we utilize normalized excess variance ($σ_{\mathrm{rms}}^{2}$) probe on timescales several months years calculating $σ_{\mathrm{rms}}^{2}$...
SPIDERS (SPectroscopic IDentification of eROSITA Sources) is a Sloan Digital Sky Survey IV (SDSS-IV) survey running in parallel to the Extended Baryon Oscillation Spectroscopic (eBOSS) cosmology project. will obtain optical spectroscopy for large numbers X-ray-selected active galactic nuclei (AGN) and galaxy cluster members detected wide-area eROSITA, XMM–Newton ROSAT surveys. We describe methods used choose spectroscopic targets two sub-programmes X-ray selected AGN candidates All Slew have...
We analyze extensive spectroscopic and photometric data of the hypervariable quasar SDSS J131424+530527 (RMID 017) at z=0.456, an optical "changing look" from Sloan Digital Sky Survey Reverberation Mapping project that increased in luminosity by a factor 10 between 2014 2017. The observed broad emission lines all respond width to changing continuum, as expected for photoionization stratified, virialized line region. changes therefore result intrinsic accretion power rather than variable...
Aims. Upcoming large area sky surveys like Euclid and eROSITA, which are dedicated to studying the role of dark energy in expansion history Universe three-dimensional mass distribution matter, crucially depend on accurate photometric redshifts. The identification variable sources, such as active galactic nuclei (AGNs), achievable redshift accuracy for varying objects important view science goals eROSITA missions.
The XMM-RM project was designed to provide X-ray coverage of the Sloan Digital Sky Survey Reverberation Mapping (SDSS-RM) field. 41 XMM-Newton exposures, placed surrounding Chandra AEGIS field, were taken, covering an area 6.13 deg^2 and reaching a nominal exposure depth ~15 ks. We present catalog 3553 sources detected in these data, using PSF-fitting algorithm sample selection threshold that produces ~5% fraction spurious sources. In addition likelihood, we calculate second source...
We report on the discovery of a dramatic X-ray spectral variability event observed in $z\sim 1$ broad line type-1 QSO. The XMM-Newton spectrum from year 2000 is characterized by an unobscured power-law with photon index $\Gamma\sim 2$, column density $N_{\mathrm{H}}\sim 5\times 10^{20}\,\mathrm{cm^{-2}}$, and no prominent reflection component. Five years later, Chandra captured source heavily-obscured, reflection-dominated state. could be caused Compton-thick cloud 2\times...