Zobrazeno 1 - 10
of 34
pro vyhledávání: '"Robert G. Tull"'
Autor:
Brian Roman, M. Soukup, M. L. Villarreal, Matthew Shetrone, William D. Cochran, S. C. Odewahn, Barbara McArthur, J. Good, M. Graver, Diane B. Paulson, Robert G. Tull, Verne V. Smith, F. Deglman, Phillip J. MacQueen, Michael Endl, J. Booth
Publikováno v:
The Astrophysical Journal. 611:L133-L136
We report the first detection of a planetary-mass companion to a star using the High Resolution Spectrograph (HRS) of the Hobby-Eberly Telescope (HET). The HET-HRS now gives routine radial velocity precision of 2-3 m/s for high SNR observations of qu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7a226cbb48f61ecd52d0f2fe10a77967
https://doi.org/10.1086/423936
https://doi.org/10.1086/423936
Publikováno v:
The Astrophysical Journal. 566:L93-L96
We present ultra-high resolution spectra for a set of nearby F-G-K stars on, or close to, the main sequence. The wavelength shifts of stellar lines relative to their laboratory wavelengths are measured for more than a thousand Fe I lines per star, fi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ca53eea17b813544bc306f8fc00b781a
https://doi.org/10.1086/339658
https://doi.org/10.1086/339658
Autor:
Robert G. Tull
Publikováno v:
Applied optics. 7(10)
A spectrophotometer originally used with current measuring photometry has been modified to take advantage of the increased information rate obtainable through single-photon counting. Through careful guiding, relative wavelength displacements between
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0cc9c292b46ad8376aefbc2d1f0dd779
https://pubmed.ncbi.nlm.nih.gov/20068929
https://pubmed.ncbi.nlm.nih.gov/20068929
Autor:
Robert G. Tull
Publikováno v:
Applied optics. 7(10)
The component of dark noise produced by Cerenkov pulses in photomultipliers due to cosmic ray mu mesons is discussed. It is shown by integration of pulse height spectra that this source of noise can be the limiting factor in dc measuring spectrophoto
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::594eed8c4f480cdaa845765b78ed1c86
https://pubmed.ncbi.nlm.nih.gov/20068930
https://pubmed.ncbi.nlm.nih.gov/20068930
We present first results of our planet search program using the 9.2 meter Hobby-Eberly Telescope (HET) at McDonald Observatory to detect planets around M-type dwarf stars via high-precision radial velocity (RV) measurements. Although more than 100 ex
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2ae8ec13ab9417306e5bdafa38564afd
Autor:
Robert G. Tull
Publikováno v:
Optical Astronomical Instrumentation.
A high-resolution spectrograph (HRS) is taking shape for the Hobby-Eberly Telescope (HET). HRS will be mounted on a Newport bench in an insulated chamber in the 'basement' of the HET building, internal to the pier, and will be linked to the corrected
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2e1307f8d397ed7d0f2a694c52c24515
https://doi.org/10.1117/12.316774
https://doi.org/10.1117/12.316774
Autor:
Robert G. Tull
Publikováno v:
Instrumentation in Astronomy VIII.
An international team led by The University of Texas and Pennsylvania State University is planning a fiber fed highresolution spectrograph for the Spectroscopic Survey Telescope. Design goals are (1) resolution 60,000 with a fiberdiameter greater tha
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f5cacb38d82bcd4815fb35398d71a28b
https://doi.org/10.1117/12.176807
https://doi.org/10.1117/12.176807
Publikováno v:
The Astronomical Journal. 132:2755-2755
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::cdb947bd2ffb8353167f62b9a0fffc77
https://doi.org/10.1086/509659
https://doi.org/10.1086/509659
Autor:
David Walker, R. Angel, Steven S. Vogt, Hans Dekker, F. Diego, Robert G. Tull, K. Hinkle, Catherine A. Pilachowski
Publikováno v:
Publications of the Astronomical Society of the Pacific. 107:983
Spectrographs designed or built for the Keck, Gemini, Hobby-Eberly, MMT, and ESO Very Large Telescopes are described and compared to demonstrate principles and constraints in the design of spectrographs for 8-m to 10-m class telescopes.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::266e4404676e1443a2d32b7feb22e9c3
https://doi.org/10.1086/133648
https://doi.org/10.1086/133648
Publikováno v:
Publications of the Astronomical Society of the Pacific. 107:251
A new high-resolution cross-dispersed echelle spectrometer has been installed at the coude focus of the McDonald Observatory 2.7-m telescope. Its primary goal was simultaneously to gather spectra over as much of the spectral range 3400 A to 1 microme
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5d1147b9570b6cec7904f5040fcbf71f
https://doi.org/10.1086/133548
https://doi.org/10.1086/133548