Richard E. Griffiths
Carnegie Mellon University
22 Papers
178 Citations
Richard E. Griffiths is an academic researcher from Carnegie Mellon University. The author has contributed to research in topics: Luminosity & Galaxy. The author has an hindex of 17, co-authored 22 publications. Previous affiliations of Richard E. Griffiths include California Institute of Technology.
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Papers
X-Ray Fluctuation Power Spectral Densities of Seyfert 1 Galaxies
Alex Markowitz,Rick Edelson,Simon Vaughan,Philip Uttley,Ian M. George,Ian M. George,Richard E. Griffiths,Shai Kaspi,Andy Lawrence,Ian M. McHardy,Kirpal Nandra,Kirpal Nandra,Ken Pounds,James Reeves,Nicholas J. Schurch,Nicholas J. Schurch,R. S. Warwick +16 more
TL;DR: In this article, power spectral densities (PSDs) of six Seyfert 1 galaxies are constructed by combining complementary monitoring observations spanning long, medium and short time scales, and the data are consistent with the linear relation T = M(sub BH) /10(exp 6.5) solar mass; extrapolation over 6-7 orders of magnitude is in reasonable agreement with XRBs.
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The Chandra COSMOS Legacy survey: optical/IR identifications
S. Marchesi,S. Marchesi,S. Marchesi,Francesca Civano,Francesca Civano,Martin Elvis,Mara Salvato,Marcella Brusa,Andrea Comastri,Roberto Gilli,Günther Hasinger,Giorgio Lanzuisi,Takamitsu Miyaji,Takamitsu Miyaji,Ezequiel Treister,C. M. Urry,Cristian Vignali,G. Zamorani,Viola Allevato,Nico Cappelluti,C. Cardamone,Alexis Finoguenov,Richard E. Griffiths,Alexander Karim,Clotilde Laigle,Stephanie M. LaMassa,Knud Jahnke,Piero Ranalli,Kevin Schawinski,Eva Schinnerer,Eva Schinnerer,John D. Silverman,Vernesa Smolčić,Hyewon Suh,Benny Trakhtenbrot +34 more
TL;DR: The catalog of optical and infrared counterparts of the Chandra COSMOS-Legacy Survey, a 4.6Ms Chandra program on the 2.2 square degrees of the COS MOS field, was presented in this paper.
Detection of Nuclear X-Ray Sources in Nearby Galaxies with Chandra
Luis C. Ho,Eric D. Feigelson,Leisa K. Townsley,Rita M. Sambruna,Rita M. Sambruna,Gordon P. Garmire,W. N. Brandt,Alexei V. Filippenko,Richard E. Griffiths,Andrew Ptak,Wallace L. W. Sargent +10 more
TL;DR: In this article, preliminary results from an arcsecond-resolution X-ray survey of nearby galaxies using the Advanced CCD Imaging Spectrometer on board the Chandra X-Ray Observatory were reported.
262
The CHANDRA COSMOS Legacy Survey: Optical / IR Identifications
S. Marchesi,S. Marchesi,S. Marchesi,Francesca Civano,Francesca Civano,Martin Elvis,Mara Salvato,Marcella Brusa,Andrea Comastri,Roberto Gilli,Günther Hasinger,Giorgio Lanzuisi,Takamitsu Miyaji,Takamitsu Miyaji,Ezequiel Treister,C. M. Urry,Cristian Vignali,G. Zamorani,Viola Allevato,Nico Cappelluti,C. Cardamone,Alexis Finoguenov,Richard E. Griffiths,Alexander Karim,Clotilde Laigle,Stephanie M. LaMassa,Knud Jahnke,Piero Ranalli,Kevin Schawinski,Eva Schinnerer,Eva Schinnerer,John D. Silverman,Vernesa Smolčić,Hyewon Suh,Benny Trakhtenbrot +34 more
TL;DR: The catalog of optical and infrared counterparts of the Chandra COSMOS-Legacy Survey, a 4.6Ms Chandra program on the 2.2 deg2 of the COS MOS field, was presented in this article.
251
Detailed Shape and Evolutionary Behavior of the X-ray Luminosity Function of Active Galactic Nuclei
Takamitsu Miyaji,Takamitsu Miyaji,Guenther Hasinger,Mara Salvato,Marcella Brusa,Nico Cappelluti,Francesca Civano,Francesca Civano,Simonetta Puccetti,Martin Elvis,Hermann Brunner,Sotiria Fotopoulou,Yoshihiro Ueda,Richard E. Griffiths,Anton M. Koekemoer,Masayuki Akiyama,Andrea Comastri,Roberto Gilli,Giorgio Lanzuisi,Andrea Merloni,Cristian Vignali +20 more
TL;DR: In this article, the rest-frame 2-10 keV intrinsic X-ray luminosity function of active galactic nuclei (AGNs) was derived from a combination of Xray surveys from the all-sky Swift BAT survey to the Chandra Deep Field-South.
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