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2 edition of A deep X-ray survey in the Lockman Hole and the Soft X-ray log N - log S found in the catalog.

A deep X-ray survey in the Lockman Hole and the Soft X-ray log N - log S

A deep X-ray survey in the Lockman Hole and the Soft X-ray log N - log S

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Published by Max-Planck-Institut für Extraterrestrische Physik, National Aeronautics and Space Administration, National Technical Information Service, distributor in München, Germany, [Washington, DC, Springfield, Va .
Written in English

    Subjects:
  • X-ray sources, Galactic.

  • Edition Notes

    StatementG. Hasinger ... [et al.].
    SeriesNASA contractor report -- NASA CR-194698.
    ContributionsHasinger, Günther., United States. National Aeronautics and Space Administration.
    The Physical Object
    FormatMicroform
    Pagination1 v.
    ID Numbers
    Open LibraryOL18065628M

    The ROSAT satellite has carried out a very deep X-ray survey of a particular region of the sky, the Lockman Hole, known for its exceptionally low HI column density. The field was also observed at 20 cm with the C configuration of the Very Large Array. SXR - Soft X-ray. Looking for abbreviations of SXR? It is Soft X-ray. Soft X-ray listed as SXR () A deep X-ray survey in the Lockman-Hole and the soft X-ray log N-log S. Soft wrap; Soft wrap; Soft wrap; Soft X-ray; Soft X-Ray Appearance Potential Spectroscopy; Soft X-Ray Background;.

    (4%). Recently, deep pointed ROSAT surveys such as the Lockman Hole studied by Hasinger et al. (), () and the QSF3 eld by Shanks et al. () contributed new information,in particular concerning the composition of the soft X-ray background. In the deep sample studied by Hasinger et al. morethan 60%of the sources were found. The origin of the cosmic X-ray background radiation1,2 has remained mysterious since its discovery3 thirty-five years ago. Investigation of its origin has been difficult because instruments have.

      A further separation is beyond of the scope of our paper. The reader is referred to a review of Mainieri et al. () for a detailed discussion of the physical nature of the sources found in the Lockman Hole, combining X-ray data with optical/near IR data. 6. log(N)–log(S). 2 A N A LY S I S X-ray data and optically-detected sources The Ms CDF-N covers a total of arcmin2 and is larger than the GOODS-N optical survey region, which is focused on the CDF-N aim-point. 3 X-ray source detection sensitivities are and erg cm2 s1 in the and 28 keV bands, respectively.


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A deep X-ray survey in the Lockman Hole and the Soft X-ray log N - log S Download PDF EPUB FB2

From an analysis in the Lockman field, a best fit slope of approximately is found for the extrapolation of the differential X-ray counts below times 10 to the power of minus 15 erg/sq cm s.

On the basis of this analysis an upper limit of approximately 25% can be found for a truly diffuse background component in the Rosat hard by: 3. In addition 26 shallower fields from the ROSAT medium sensitivity survey (RMSS) are analysed. X-ray sources have been detected in at least one ROSAT energy band in these fields covering a total solid angle of deg^2^; of these sources constitute a statistically complete sample detected in the hard band with keV fluxes greater than 10^^ erg cm^-2^ s^-1^.

Get this from a library. A deep X-ray survey in the Lockman Hole and the Soft X-ray log N - log S. [Günther Hasinger; United States. National Aeronautics and Space Administration.;]. (Erratum) A deep X-ray survey in the Lockman Hole and in the soft X-ray logN-logS Article (PDF Available) in Astronomy and Astrophysics October with.

The ROSAT Deep Survey in the Lockman Hole is the most sensitive X-ray survey performed to date, encompassing an exposure time of ksec with the PSPC and a total of Msec with the HRI aboard. The authors have carried out a moderate-depth (70 ks), contiguous square degrees Chandra survey in the Lockman Hole Field of the Spitzer/SWIRE Legacy Survey coincident with a completed, ultra-deep VLA survey with deep optical and near-infrared imaging in-hand.

The Chandra Deep Field North (CDFN, Brandt et al., ) and the Chandra Deep Field South (CDFS, Giacconi et al.,Rosati et al., ) have been observed with the ACIS-I array for 2 and 1 Ms, respectively, and represent the two deepest X-ray surveys to the 2 Ms CDFN the achieved sensitivity limit is ∼ × 10 −17 erg cm −2 s −1 in the soft band and ∼ × 10 −16 erg.

In particular, the redshift distribution of soft X-ray selected AGN in the ROSAT Ultra Deep Survey (UDS, Lehmann et al. ) at a limiting flux of f ~ erg cm-2 s-1 was nicely reproduced, as well as that of hard X-ray selected AGN in the ASCA Large Sky Survey (Akiyama et al. ) at a limiting flux of f ~ erg cm-2 s The deep X-ray surveys performed by the two major X-ray observatories on flight, Chandra and XMM, are being resolving the bulk of the cosmic X-ray background (XRB) in the 2{10 keV energy band, where the sky flux is dominated by extragalactic emission.

I present the X-ray analysis of the Chandra Large Area Synoptic X-ray Survey (CLASXS) of the Lockman Hole Northwest field. The contiguous solid angle of the survey is about sqr degree and the flux limits are 5x10^ erg/cm^2/s in the keV band and 3x10^ erg/cm^2/s in the $$~keV band.

So the Lockman Hole serves as a relatively clear window on distant objects, which makes it an attractive area of the sky for observational astronomy surveys.

It is located near the pointer stars of the Big Dipperin the constellationUrsa Majorand is about 15 square degrees in size. The Deepest X-ray Surveys CDF-N (HDF-N) CDF-S (ACS UDF) Brandt & Hasinger, ARAA Ultra Deep Field AGN - Lockman Hole ks XMM-Newton observation Keck Spectroscopy: Lehmann et al., • Chandra Deep Surveys – CDF North/HDF-N: 67 (21) AGN (Barger et al., ).

Deep Sky Survey (DSS) 4 −10 14 Lockman Hole Deep Survey 4 10−14 Survey of deep ROSAT elds 5 10−14 ASCA Medium-Sensitivity Survey (AMSS) 7 10−14 study of the X-ray band above 2 keV with a sensitivity up to several 10 −14erg s 1 cm−2 (2{10 keV) and covers the wide energy band from to 10 keV, which allows.

The Ro¨ntgen satellite (ROSAT) provided us with soft X-ray surveys with various depths, ranging from the ROSAT All-Sky Survey (RASS, Voges et al) to the ROSAT Deep Survey (RDS) on the Lockman Hole (Hasinger et al.

Various optical identification pro-grams of the survey fields have been conducted and the. The sources discovered in deep hard X-ray surveys with keV fluxes of S2−8∼10−14 erg cm−2 s−1 make up the bulk of the X-ray background at these energies.

We present here detailed multi-wavelength observations of three such sources from the ELAIS Deep X-ray Survey. The observations include sensitive near-infrared spectroscopy with the Subaru Telescope and X-ray spectral information.

black holes produce the bulk of the XRB, the deepest X-ray surveys are now allowing the study of other source classes, including starburst and normal galaxies. In this paper, we will review some of the current results from the ongoing Chandra Deep Field-North (CDF-N) survey.

Other ongoing deep X-ray surveys. We present the first results from an XMM-Newton serendipitous medium-deep survey, which covers nearly 3 deg detect a total of, and sources, down to minimum fluxes of about ××and × ergs cm-2 s-1, in the, and keV bands, the soft band this is one of the largest samples available to date and surely the.

The ROSAT Ultradeep HRI survey in the Lockman Hole contains a complete sam-ple of 91 X-ray sources with fluxes in the keV band larger than 10−15 erg cm−2 s−1, where over 75 % of the sources are quasars or Seyfert galaxies.

During the course of our optical identification work, we have obtained optical spectra of   The origin of the hard (2–10 keV) X-ray background has been a mystery for over 35 years. Most of the soft X-ray background has been resolved into individual sources (mainly quasars), but these.

The ROSAT Ultradeep HRI survey in the Lockman Hole contains a complete sample of 91 X-ray sources with fluxes in the –2 keV band larger than ×10 −15 erg cm −2 s −1. LogN-LogS Rosati et al. () log N-log S in the soft ( 2 keV), hard (2 10 keV), and very hard (5 10 keV) bands from the 1 Ms observations of the CDF-S.

The shaded areas indicate uncertainties due to the Poisson statistics (1) and the choice of the conversion factor (corresponding to a power law spectrum with = ± ). Dashed lines are previous measurements: ROSAT deep surveys in the.ROSAT AGN selected in the soft (Œ keV) band with log LX > compared to the optical surveys.

The optical space densities have been scaled to match the X-ray points at z = for ease of comparison. 3. CO-MOVING SPACE DENSITY OF LUMI-NOUS AGN Using AGN from the ChaMP and those from additional surveys (CDF-N, CDF-S, ROSAT), we have.

DEEP EXTRAGALACTIC X-RAY SURVEYS DEEP EXTRAGALACTIC X-RAY SURVEYS Brandt, W.N.; Hasinger, G. TO DEEP EXTRAGALACTIC X-RAY SURVEYS Deep extragalactic surveys have been successful tools in unraveling the formation and evolution of cosmic building blocks, including galaxies, clusters and groups of galaxies, large-scale structures, and supermassive black holes .