A
Andy Ptak
Researcher at Goddard Space Flight Center
Publications - 87
Citations - 14936
Andy Ptak is an academic researcher from Goddard Space Flight Center. The author has contributed to research in topics: Galaxy & Luminosity. The author has an hindex of 28, co-authored 81 publications receiving 10153 citations. Previous affiliations of Andy Ptak include Johns Hopkins University.
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Journal ArticleDOI
Astropy: A community Python package for astronomy
Thomas P. Robitaille,Erik Tollerud,Perry Greenfield,Michael Droettboom,Erik Bray,Tom Aldcroft,Matt Davis,Adam Ginsburg,Adrian M. Price-Whelan,Wolfgang Kerzendorf,A. Conley,Neil H. M. Crighton,Kyle Barbary,Demitri Muna,Henry C. Ferguson,Frédéric Grollier,Madhura Parikh,Prasanth H. Nair,Hans Moritz Günther,Christoph Deil,Julien Woillez,Simon Conseil,Roban Kramer,J. Turner,Leo Singer,R. T. Fox,Benjamin A. Weaver,Victor Zabalza,Zachary I. Edwards,K. Azalee Bostroem,Douglas Burke,Andrew R. Casey,Steven M. Crawford,Nadia Dencheva,Justin Ely,Tim Jenness,Kathleen Labrie,Pey Lian Lim,Francesco Pierfederici,Andrew Pontzen,Andy Ptak,Brian L. Refsdal,Mathieu Servillat,Ole Streicher +43 more
TL;DR: Astropy as discussed by the authors is a Python package for astronomy-related functionality, including support for domain-specific file formats such as flexible image transport system (FITS) files, Virtual Observatory (VO) tables, common ASCII table formats, unit and physical quantity conversions, physical constants specific to astronomy, celestial coordinate and time transformations, world coordinate system (WCS) support, generalized containers for representing gridded as well as tabular data, and a framework for cosmological transformations and conversions.
Journal ArticleDOI
Astropy: A Community Python Package for Astronomy
Thomas P. Robitaille,Erik Tollerud,Perry Greenfield,Michael Droettboom,Erik Bray,Tom Aldcroft,Matt Davis,Adam Ginsburg,Adrian M. Price-Whelan,Wolfgang Kerzendorf,A. Conley,Neil H. M. Crighton,Kyle Barbary,Demitri Muna,Henry C. Ferguson,Frédéric Grollier,Madhura Parikh,Prasanth H. Nair,Hans Moritz Günther,Christoph Deil,Julien Woillez,Simon Conseil,Roban Kramer,J. Turner,Leo Singer,R. T. Fox,Benjamin A. Weaver,Victor Zabalza,Zachary I. Edwards,K. Azalee Bostroem,Douglas Burke,Andrew R. Casey,Steven M. Crawford,Nadia Dencheva,Justin Ely,Tim Jenness,Kathleen Labrie,Pey Lian Lim,Francesco Pierfederici,Andrew Pontzen,Andy Ptak,Brian L. Refsdal,Mathieu Servillat,Ole Streicher +43 more
TL;DR: Astropy as mentioned in this paper provides core astronomy-related functionality to the community, including support for domain-specific file formats such as Flexible Image Transport System (FITS) files, Virtual Observatory (VO) tables, and common ASCII table formats, unit and physical quantity conversions, physical constants specific to astronomy, celestial coordinate and time transformations, world coordinate system (WCS) support, generalized containers for representing gridded as well as tabular data, and a framework for cosmological transformations and conversions.
Journal ArticleDOI
A chandra perspective on galaxy-wide x-ray binary emission and its correlation with star formation rate and stellar mass: new results from luminous infrared galaxies
Bret D. Lehmer,Bret D. Lehmer,David M. Alexander,Franz E. Bauer,Franz E. Bauer,W. N. Brandt,Andy D. Goulding,L. P. Jenkins,L. P. Jenkins,Andy Ptak,Timothy P.L. Roberts +10 more
TL;DR: In this article, Chandra observations were used to complete a sample of seventeen (17) luminous infrared galaxies (LIRGs) with D < 60 Mpc and low Galactic column densities of NH 5 × 10 20 cm −2.
Journal ArticleDOI
Discovery of coherent pulsations from the Ultraluminous X-ray Source NGC 7793 P13
F. Fuerst,Dominic J. Walton,Dominic J. Walton,Fiona A. Harrison,Daniel Stern,Didier Barret,Murray Brightman,A. C. Fabian,Brian W. Grefenstette,Kristin K. Madsen,Matthew J. Middleton,Jon M. Miller,Katja Pottschmidt,Katja Pottschmidt,Andy Ptak,Vikram Rana,N. A. Webb +16 more
TL;DR: In this article, coherent pulsations from the ultraluminous X-ray source NGC 7793 P13 were detected in archived XMM-Newton data taken in 2013 and 2014.
Journal ArticleDOI
The relationship of hard x-ray and optical line emission in low-redshift active galactic nuclei
TL;DR: In this paper, the authors assess the relationship of the population of active galactic nuclei (AGNs) selected by hard X-rays to the traditional population of AGNs with strong optical emission lines.