G. Hasinger
A5046987116- Astrophysical Phenomena and Observations
- Galaxies: Formation, Evolution, Phenomena
- Astronomy and Astrophysical Research
- Gamma-ray bursts and supernovae
- Astronomical Observations and Instrumentation
- Astrophysics and Cosmic Phenomena
- Stellar, planetary, and galactic studies
- Pulsars and Gravitational Waves Research
- Adaptive optics and wavefront sensing
- Particle Detector Development and Performance
- Calibration and Measurement Techniques
- Cosmology and Gravitation Theories
- Astrophysics and Star Formation Studies
- History and Developments in Astronomy
- High-pressure geophysics and materials
- Geophysics and Gravity Measurements
- X-ray Spectroscopy and Fluorescence Analysis
- Advanced X-ray Imaging Techniques
- Dark Matter and Cosmic Phenomena
- Particle Accelerators and Free-Electron Lasers
- Scientific Measurement and Uncertainty Evaluation
- Radio Astronomy Observations and Technology
- CCD and CMOS Imaging Sensors
- Solar and Space Plasma Dynamics
- Nuclear Physics and Applications
TU Dresden
2024
European Space Astronomy Centre
2018-2023
University of Hawaii System
2012-2021
European Space Agency
2020
University of Hawaiʻi at Mānoa
2014-2019
Monterey Institute for Research in Astronomy
2013-2018
Goddard Space Flight Center
2018
Max Planck Institute for Plasma Physics
2008-2016
Max Planck Institute for Extraterrestrial Physics
2003-2014
Max Planck Society
2002-2011
We explore the inter-relationships between mass, star-formation rate and environment in SDSS, zCOSMOS other surveys. The differential effects of mass are completely separable to z ~ 1, indicating that two distinct processes operating, "mass-quenching" "environment-quenching". Environment-quenching, at fixed over-density, evidently does not change with epoch suggesting it occurs as large-scale structure develops Universe. observed constancy mass-function shape for star-forming galaxies,...
The Cosmic Evolution Survey (COSMOS) is designed to probe the correlated evolution of galaxies, star formation, active galactic nuclei (AGN) and dark matter (DM) with large-scale structure (LSS) over redshift range z $> 0.5 $ 6. survey includes multi-wavelength imaging spectroscopy from X-ray radio wavelengths covering a 2 $\sq$°area, including HST imaging. Given very high sensitivity resolution these datasets, COSMOS also provides unprecedented samples objects at greatly reduced cosmic...
Pan-STARRS1 has carried out a set of distinct synoptic imaging sky surveys including the $3π$ Steradian Survey and Medium Deep in 5 bands ($grizy_{P1}$). The mean 5$σ$ point source limiting sensitivities stacked 3$π$ $grizy_{P1}$ are (23.3, 23.2, 23.1, 22.3, 21.4) respectively. upper bound on systematic uncertainty photometric calibration across is 7-12 millimag depending bandpass. astrometric using Gaia frame comes from comparison results with Gaia: standard deviation median residuals ($...
ABSTRACT We present the COSMOS2015 24 catalog, which contains precise photometric redshifts and stellar masses for more than half a million objects over 2deg 2 COSMOS field. Including new <?CDATA ${{YJHK}}_{{\rm{s}}}$?> images from UltraVISTA-DR2 survey, Y-band Subaru/Hyper-Suprime-Cam, infrared data Spitzer Large Area Survey with Hyper-Suprime-Cam legacy program, this near-infrared-selected catalog is highly optimized study of galaxy evolution environments in early universe. To maximize...
We present accurate photometric redshifts (photo-z) in the 2-deg2 COSMOS field. The are computed with 30 broad, intermediate, and narrowbands covering UV (Galaxy Evolution Explorer), visible near-IR (NIR; Subaru, Canada–France–Hawaii Telescope (CFHT), United Kingdom Infrared Telescope, National Optical Astronomy Observatory), mid-IR (Spitzer/IRAC). A χ2 template-fitting method (Le Phare) was used calibrated large spectroscopic samples from Very Large Visible Multi-Object Spectrograph Keck...
zCOSMOS is a large-redshift survey that being undertaken in the COSMOS field using 600 hr of observation with VIMOS spectrograph on 8 m VLT. The designed to characterize environments galaxies from 100 kpc scales galaxy groups up Mpc scale cosmic web and produce diagnostic information active galactic nuclei. consists two parts: (1) zCOSMOS-bright, magnitude-limited I-band IAB < 22.5 sample about 20,000 0.1 z 1.2 covering whole 1.7 deg2 ACS field, for which parameters at ~ 0.7 are be directly...
High-sensitivity wide-band X-ray spectroscopy is the key feature of Suzaku observatory, launched on 2005 July 10. This paper summarizes spacecraft, in-orbit performance, operations, and data processing that are related to observations. The scientific instruments, high-throughput telescopes, CCD cameras, non-imaging hard detector also described.
We present imaging data and photometry for the COSMOS survey in 15 photometric bands between 0.3 2.4 μm. These include taken on Subaru 8.3 m telescope, KPNO CTIO 4 telescopes, CFHT 3.6 telescope. Special techniques are used to ensure that relative calibration is better than 1% across field of view. The absolute accuracy from standard-star measurements found be 6%. corrected using galaxy spectra, providing colors accurate 2% or better. Stellar counts agree well with expected values. Finally,...
Ultraluminous infrared galaxies (ULIRGs) are outstanding due to their huge luminosity output in the infrared, which is predominantly powered by super starbursts and/or hidden active galactic nuclei (AGN). NGC 6240 one of nearest ULIRGs and considered a key representative its class. Here, we report first high-resolution imaging spectroscopy X-rays. The observation, performed with ACIS-S detector aboard Chandra X-ray observatory, led discovery two hard nuclei, coincident optical-IR 6240. AGN...
In this paper we present the source catalog obtained from a 942 ks exposure of Chandra Deep Field South (CDFS), using Advanced CCD Imaging Spectrometer (ACIS-I) on X-ray Observatory. Eleven individual pointings made between 1999 October and 2000 December were combined to generate final image used for object detection. Catalog generation proceeded simultaneously two different methods; method our own design modified version SExtractor algorithm, wavelet transform technique developed...
The Spitzer-COSMOS survey (S-COSMOS) is a Legacy program (Cycles 2+3) designed to carry out uniform deep of the full 2 sq deg COSMOS field in all seven Spitzer bands (3.6, 4.5, 5.6, 8.0, 24.0, 70.0, 160.0 u). This paper describes parameters, mapping strategy, data reduction procedures, achieved sensitivities date, and complete set for future reference. We show that observed infrared backgrounds S-COSMOS are within 10% predicted background levels. fluctuations at 24u have been measured do not...
We present new results on the cosmological evolution of unabsorbed (type-1) active galactic nuclei (AGN) selected in soft (0.5-2 keV) X-ray band. From a variety ROSAT, XMM-Newton and Chandra surveys we total ~1000 AGN with an unprecedented spectroscopic photometric optical/NIR identification completeness. For first time are able to derive reliable space densities for low-luminosity (Seyfert-type) sources at redshifts. The evolutionary behaviour shows strong dependence luminosity: while...
We present spectroscopic redshifts of a large sample galaxies with IAB < 22.5 in the COSMOS field, measured from spectra 10,644 objects that have been obtained first two years observations zCOSMOS-bright redshift survey. These include statistically complete subset 10,109 objects. The average accuracy individual is 110 km s−1, independent redshift. reliability described by Confidence Class has empirically calibrated through repeat over 600 galaxies. There very good agreement between and...
We present the results of our spectroscopic follow-up program X-ray sources detected in 942 ks exposure Chandra Deep Field-South (CDFS). A total 288 possible counterparts were observed at VLT with FORS1/FORS2 spectrographs for 251 349 (including three additional faint sources). Spectra and R-band images are shown all R - K colors given most them. Spectroscopic redshifts obtained 168 sources, which 137 have both reliable optical identification redshift estimate 16 external identifications)....
eROSITA is the primary instrument on Russian SRG mission. In first four years of scientific operation after its launch, foreseen for 2014, it will perform a deep survey entire X-ray sky. soft band (0.5-2 keV), this be about 20 times more sensitive than ROSAT all sky survey, while in hard (2-10 keV) provide ever true imaging at those energies. Such all-sky revolutionize our view high-energy sky, and calls major efforts synergic, multi-wavelength wide area surveys order to fully exploit...
The Cosmic Evolution Survey (COSMOS) was initiated with an extensive allocation (590 orbits in Cycles 12-13) using the Hubble Space Telescope (HST) for high resolution imaging. Here we review characteristics of HST imaging Advanced Camera Surveys (ACS) and parallel observations NICMOS WFPC2. A square field (1.8$\sq$\deg) has been imaged single-orbit ACS I-F814W exposures 50% completeness sources 0.5\arcsec diameter at I$_{AB} $ = 26.0 mag. is a key part COSMOS survey, providing very...
The COSMOS-Legacy survey is a 4.6 Ms Chandra program that has imaged 2.2 deg$^2$ of the COSMOS field with an effective exposure $\simeq$160 ks over central 1.5 and $\simeq$80 in remaining area. combination 56 new observations, obtained as X-ray Visionary Project, previous C-COSMOS survey. We describe reduction analysis observations properties 2273 point sources detected above spurious probability 2$\times 10^{-5}$. also present updated data. whole includes 4016 (3814, 2920 2440 full, soft...
The Chandra COSMOS Survey (C-COSMOS) is a large, 1.8 Ms, Chandra} program that has imaged the central 0.5 sq.deg of field (centered at 10h, +02deg) with an effective exposure ~160ksec, and outer 0.4sq.deg. area ~80ksec. limiting source detection depths are 1.9e-16 erg cm(-2) s(-1) in Soft (0.5-2 keV) band, 7.3e(-16) cm^-2 s^-1 Hard (2-10 5.7e(-16) Full (0.5-10 band. Here we describe strategy, design execution C-COSMOS survey, present catalog 1761 point sources detected probability being...
We present the COMBO-17 object catalogue of Chandra Deep Field South for public use, covering a field which is in size. This lists astrometry, photometry 17 passbands from 350 to 930 nm, and ground-based morphological data 63 501 objects. The also contains multi-colour classification into categories Star, Galaxy Quasar as well photometric redshifts. include restframe luminosities Johnson, SDSS Bessell estimated errors. redshifts are most reliable at , where sample approximately 100 quasars,...
▪ Abstract Deep surveys of the cosmic X-ray background are reviewed in context observational progress enabled by Chandra X-Ray Observatory and Multi-Mirror Mission-Newton. The sources found deep described along with their redshift luminosity distributions, effectiveness such at selecting active galactic nuclei (AGN) is assessed. Some key results from highlighted, including (a) measurements AGN evolution growth supermassive black holes, (b) constraints on demography physics high-redshift AGN,...
We present the most up-to-date X-ray luminosity function (XLF) and absorption of Active Galactic Nuclei (AGNs) over redshift range from 0 to 5, utilizing largest, highly complete sample ever available obtained surveys performed with Swift/BAT, MAXI, ASCA, XMM-Newton, Chandra, ROSAT. The combined sample, including that Subaru/XMM-Newton Deep Survey, consists 4039 detections in soft (0.5--2 keV) and/or hard ($>2$ band. utilize a maximum likelihood method reproduce count-rate versus...
We present a detailed X-ray spectral analysis of the sources in 1Ms catalog Chandra Deep Field South (CDFS) taking advantage optical spectroscopy and photometric redshifts for 321 extragalactic out total sample 347 sources. As default model, we adopt power law with slope Γ an intrinsic redshifted absorption NH, fixed Galactic unresolved Fe emission line. For 82 bright sources, are able to perform leaving both NH free. The weighted mean value is , distribution best fit values shows dispersion...
We measure the stellar mass function (SMF) and density of galaxies in COSMOS field up to z ~ 6. select them near-IR bands COSMOS2015 catalogue, which includes ultra-deep photometry from UltraVISTA-DR2, SPLASH, Subaru/Hyper Suprime-Cam. At > 2.5 we use new precise photometric redshifts with error σ = 0.03(1 + ) an outlier fraction 12%, estimated by means unique spectroscopic sample (~100 000 measurements total, more than one thousand having robust spec 2.5). The increased exposure time...