Zobrazeno 1 - 10
of 18
pro vyhledávání: '"Stephen L. Redman"'
Autor:
Joanna M. Rankin, Stephen L. Redman
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 395:1529-1532
Pulsar nulling is not always a random process; most pulsars, in fact, null non-randomly. The Wald-Wolfowitz statistical runs test is a simple diagnostic that pulsar astronomers can use to identify pulsars that have non-random nulls. It is not clear a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::259b507e0f018df359fa13f2acbc149d
https://doi.org/10.1111/j.1365-2966.2009.14632.x
https://doi.org/10.1111/j.1365-2966.2009.14632.x
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 357:859-872
Analyses of multiple pulse sequences of B2303+30 reveal that this pulsar has two distinct emission modes. One mode (B) follows a steady even-odd pattern and is more intense. The second mode (Q) is characteristically weak, but has intermittent driftba
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7991a0f11fb5bbf5c05d33286a8088d1
https://doi.org/10.1111/j.1365-2966.2005.08672.x
https://doi.org/10.1111/j.1365-2966.2005.08672.x
Autor:
Stephen L. Redman, Suvrath Mahadevan, Samuel Halverson, Fred R. Hearty, Nick Venditti, Scott W. Fleming, John C. Wilson, Lawrence W. Ramsey, Matthew J. Nelson, Jon Holtzman, Dmitry Bizyaev, David L. Nidever, Gillian Nave
We discuss the ongoing development of single-mode fiber Fabry-Perot (FFP) Interferometers as precise astro-photonic calibration sources for high precision radial velocity (RV) spectrographs. FFPs are simple, inexpensive, monolithic units that can yie
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3910f0e016f3eb0e16240a4cac93b114
http://arxiv.org/abs/1403.6841
http://arxiv.org/abs/1403.6841
We have made precise observations of a thorium-argon hollow cathode lamp emission spectrum in the region between 350 nm and 1175 nm using a high-resolution Fourier transform spectrometer. Our measurements are combined with results from seven previous
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c19a3b1defa687dd1c326fc01198946f
http://arxiv.org/abs/1308.5229
http://arxiv.org/abs/1308.5229
Autor:
Stephen L. Redman, Lawrence W. Ramsey, Gillian Nave, Fred R. Hearty, John C. Wilson, Samuel Halverson, Jon A. Holtzman, Suvrath Mahadevan
Publikováno v:
SPIE Proceedings.
We present the ongoing development of a commercially available Micron Optics fiber-Fabry Perot Interferometer as a precise, stable, easy to use, and economic spectrograph reference with the goal of achieving
16 pages, 11 figures. To appear in th
16 pages, 11 figures. To appear in th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::dac64e7c8e3184976bcf98ab50a0258e
https://doi.org/10.1117/12.925716
https://doi.org/10.1117/12.925716
Publikováno v:
SPIE Proceedings.
Modal noise in fibers has been shown to limit the signal-to-noise ratio achievable in fiber-coupled, high-resolution spectrographs if it is not mitigated via modal scrambling techniques. Modal noise become significantly more important as the waveleng
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::426126cded629b758382d248bfd9eccd
https://doi.org/10.1117/12.926287
https://doi.org/10.1117/12.926287
Autor:
P. Figueira, Suvrath Mahadevan, Gillian Nave, Jonathan Smoker, Florian Kerber, Lawrence W. Ramsey, Stephen L. Redman, Hans-Ulrich Käufl
Publikováno v:
SPIE Proceedings.
We present work done to prepare two new near-infrared calibration sources for use on high-precision astrophysical spectrographs. Uranium-neon is an atomic calibration source, commercially available as a hollow-cathode lamp, with over 10 000 known emi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::14af7222fd9ac6381b8776a467da3f94
https://doi.org/10.1117/12.925585
https://doi.org/10.1117/12.925585
Autor:
Ryan Terrien, Brandon Botzer, Steve Osterman, Chad F. Bender, Scott A. Diddams, Stephen L. Redman, Gabriel Ycas, Steinn Sigurdsson, Suvrath Mahadevan, Franklyn Quinlan, Lawrence W. Ramsey
Publikováno v:
SPIE Proceedings.
Radial velocity (RV) surveys supported by high precision wavelength references (notably ThAr lamps and I2 cells) have successfully identified hundreds of exoplanets; however, as the search for exoplanets moves to cooler, lower mass stars, the optimum
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2ca91345c018a097ffdb6d98d8e6c249
https://doi.org/10.1117/12.926868
https://doi.org/10.1117/12.926868
Autor:
Chad F. Bender, Jason T. Wright, Adam Burton, Ryan Terrien, Rohit Deshpande, Suvrath Mahadevan, James F. Kasting, Lawrence W. Ramsey, Scott A. Diddams, Michael Endl, Steven N. Osterman, Matthew J. Nelson, Fred R. Hearty, Stephen L. Redman, Samuel Halverson
We present the scientific motivation and conceptual design for the recently funded Habitable-zone Planet Finder (HPF), a stabilized fiber-fed near-infrared (NIR) spectrograph for the 10 meter class Hobby-Eberly Telescope (HET) that will be capable of
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ed4df700380ac24c185321a86ed67a62
http://arxiv.org/abs/1209.1686
http://arxiv.org/abs/1209.1686
Autor:
Lawrence W. Ramsey, Gabriel Ycas, Brandon Botzer, Franklyn Quinlan, Ryan Terrien, Scott A. Diddams, Steinn Sigurdsson, Stephen L. Redman, Steve Osterman, Chad F. Bender, Suvrath Mahadevan
Publikováno v:
ResearcherID
We describe and characterize a 25 GHz laser frequency comb based on a cavity-filtered erbium fiber mode-locked laser. The comb provides a uniform array of optical frequencies spanning 1450 nm to 1700 nm, and is stabilized by use of a global positioni
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7fb17cf3be982e9ff5ac686b3bc49055