Zobrazeno 1 - 10
of 55
pro vyhledávání: '"Lyke, James E."'
Autor:
Ciurlo, Anna, Turri, Paolo, Witzel, Gunther, Lu, Jessica R., Do, Tuan, Sitarski, Breann N., Fitzgerald, Michael P., Ghez, Andrea M., Alvarez, Carlos, Terry, Sean K., Doppmann, Greg, Lyke, James E., Ragland, Sam, Campbell, Randall, Matthews, Keith
Publikováno v:
Journal of Astronomical Telescopes, Instruments, and Systems, Vol. 8, Issue 3, 038007 (September 2022)
Images obtained with single-conjugate adaptive optics (AO) show spatial variation of the point spread function (PSF) due to both atmospheric anisoplanatism and instrumental aberrations. The poor knowledge of the PSF across the field of view strongly
Externí odkaz:
http://arxiv.org/abs/2210.10940
Integral Field Spectrographs (IFS) often require non-trivial calibration techniques to process raw data. The OH Suppressing InfraRed Imaging Spectrograph (OSIRIS) at the W. M. Keck Observatory is a lenslet-based IFS that requires precise methods to a
Externí odkaz:
http://arxiv.org/abs/2206.04070
Autor:
Do, Tuan, Hees, Aurelien, Ghez, Andrea, Martinez, Gregory D., Chu, Devin S., Jia, Siyao, Sakai, Shoko, Lu, Jessica R., Gautam, Abhimat K., O'Neil, Kelly Kosmo, Becklin, Eric E., Morris, Mark R., Matthews, Keith, Nishiyama, Shogo, Campbell, Randy, Chappell, Samantha, Chen, Zhuo, Ciurlo, Anna, Dehghanfar, Arezu, Gallego-Cano, Eulalia, Kerzendorf, Wolfgang E., Lyke, James E., Naoz, Smadar, Saida, Hiromi, Schödel, Rainer, Takahashi, Masaaki, Takamori, Yohsuke, Witzel, Gunther, Wizinowich, Peter
General Relativity predicts that a star passing close to a supermassive black hole should exhibit a relativistic redshift. We test this using observations of the Galactic center star S0-2. We combine existing spectroscopic and astrometric measurement
Externí odkaz:
http://arxiv.org/abs/1907.10731
Autor:
Kilpatrick, Charles D., Takaro, Tyler, Foley, Ryan J., Leibler, Camille N., Pan, Yen-Chen, Campbell, Randall D., Jacobson-Galan, Wynn V., Lewis, Hilton A., Lyke, James E., Max, Claire E., Medallon, Sophia A., Rest, Armin
We report the first detection of a credible progenitor system for a Type Ic supernova (SN Ic), SN 2017ein. We present spectra and photometry of the SN, finding it to be similar to carbon-rich, low-luminosity SNe Ic. Using a post-explosion Keck adapti
Externí odkaz:
http://arxiv.org/abs/1808.02989
Autor:
Holler, Bryan J., Young, Leslie A., Buie, Marc W., Grundy, William M., Lyke, James E., Young, Eliot F., Roe, Henry G.
In this work we investigated the longitudinal (zonal) variability of H$_2$O and ammonia (NH$_3$) hydrate ices on the surface of Charon through analysis of the 1.65 $\mu$m and 2.21 $\mu$m absorption features, respectively. Near-infrared spectra presen
Externí odkaz:
http://arxiv.org/abs/1606.05695
Akademický článek
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Autor:
Mieda, Etsuko, Wright, Shelley A., Larkin, James E., Graham, James R., Adkins, Sean M., Lyke, James E., Campbell, Randy D., Maire, Jerome, Do, Tuan, Gordon, Jacob
Publikováno v:
PASP. 126 (2014) 250-263
OSIRIS is a near-infrared integral field spectrograph operating behind the adaptive optics system at W. M. Keck Observatory. While OSIRIS has been a scientifically productive instrument to date, its sensitivity has been limited by a grating efficienc
Externí odkaz:
http://arxiv.org/abs/1401.4456
We present phase-resolved near-infrared photometry and spectroscopy of the classical nova V1500 Cyg to explore whether cyclotron emission is present in this system. While the spectroscopy do not indicate the presence of discrete cyclotron harmonic em
Externí odkaz:
http://arxiv.org/abs/1306.1504
NGC 3147, NGC 4698 and 1ES 1927+654 are active galaxies that are classified as Seyfert 2s, based on the line ratios of strong narrow emission lines in their optical spectra. However, they exhibit rapid X-ray spectral variability and/or little indicat
Externí odkaz:
http://arxiv.org/abs/1012.1865
Autor:
Close, Laird M., Zuckerman, Ben, Song, Inseok, Barman, Travis, Marois, Christian, Rice, Emily L., Siegler, Nick, Macintosh, Bruce, Becklin, Eric E., Campbell, Randy, Lyke, James E., Conrad, Al, Mignant, David Le
We imaged five objects near the star forming clouds of Ophiuchus with the Keck Laser Guide Star AO system. We resolved Allers et al. (2006)'s #11 (Oph 16222-2405) and #16 (Oph 16233-2402) into binary systems. The #11 object is resolved into a 243 AU
Externí odkaz:
http://arxiv.org/abs/astro-ph/0608574