Sculpting a pre-planetary nebula with a precessing jet: IRAS 16342-3814 (2007)
Sahai, R., Le Mignant, D., Sanchez Contreras, C., Campbell, R. D., Chaffee, F. H.
We have imaged the bipolar pre-planetary nebula IRAS 16342-3814 with the Keck adaptive optics (AO) system in four near-infrared bands in the 1.6-4.7 µm range. The lobes, which showed smoothly...
Keck AO survey of Io global volcanic activity between 2 and 5 mu m (2005)
Marchis, F, Le Mignant, D, Chaffee, F H, Davies, A G, Kwok, S H, Prange, R, ...
We present in this Keck AO paper the first global high angular resolution observations of Io in three broadband near-infrared filters: Kc (2.3 mu m), Lp (3.8 mu m), and Ms (4.7 mu m). The Keck AO...
Discovery of a Large ~200 kpc Gaseous Nebula at z=2.7 with the Spitzer Space Telescope (2005)
Dey, A., Bian, C., Soifer, B. T., Brand, K., Brown, M. J. I., Chaffee, F. H., ...
We report the discovery of a very large, spatially extended Ly alpha -emitting nebula at z=2.656 associated with a luminous mid-infrared source. The bright mid-infrared source (F(24um)=0.86 mJy) was...
LBQS 0015+0239: A Binary Quasar with Small Angular Separation (2002)
Impey, C. D., Petry, C. E., Foltz, C. B., Hewett, P. C., Chaffee, F. H.
We present spectroscopic observations with Keck/LRIS of LBQS 0015+0239, a pair of quasars at z = 2.45 with a separation of $\Delta\theta = 2.2$ arcsec (projected linear distance of 17.8 $h_{70}^{-1}$...
Deep spectroscopy of the low-metallicity blue compact dwarf galaxy SBS 0335-052 (2001)
Izotov, Y. I., Chaffee, F. H., Schaerer, D.
The results of deep long-slit spectroscopy of the extremely low-metallicity blue compact dwarf (BCD) galaxy SBS 0335-052 are presented. Down to intensity levels of 10^{-3 ... -4} of Hbeta,...
The He abundance in the metal-deficient blue compact dwarf galaxies Tol 1214-277 and Tol 65 (2001)
Izotov, Y. I., Chaffee, F. H., Green, R. F.
We present high-quality Keck telescope spectroscopic observations of the two metal-deficient blue compact dwarf (BCD) galaxies Tol 1214-277 and Tol 65. These data are used to derive the heavy-element...
The evolutionary status of the low-metallicity blue compact dwarf galaxy SBS 0940+544 (2001)
Guseva, N. G., Izotov, Y. I., Papaderos, P., Chaffee, F. H., Foltz, C. B., Green, R. F., ...
We present the results of spectrophotometry and V,R,I, Halpha CCD photometry of the blue compact dwarf (BCD) galaxy SBS 0940+544. Broad-band images taken with the 2.1m KPNO and 1.23m Calar Alto...
A spectroscopic study of component C and the extended emission around I Zw 18 (2001)
Izotov, Y. I., Chaffee, F. H., Foltz, C. B., Thuan, T. X., Green, R. F., Papaderos, P., ...
Long-slit Keck II, 4m Kitt Peak, and 4.5m MMT spectrophotometric data are used to investigate the stellar population and the evolutionary status of I Zw 18C, the faint C component of the nearby blue...
Multi-color Classification in the Calar Alto Deep Imaging Survey (2000)
Wolf, C., Meisenheimer, K., Beckwith, S. V. W., Chaffee, F. H., ...
We use a multi-color classification method introduced by Wolf, Meisenheimer & Roeser (2000) to reliably identify stars, galaxies and quasars in the up to 16-dimensional color space provided by the...
The FIRST Bright Quasar Survey. II. 60 Nights and 1200 Spectra Later (1999)
White, R. L., Becker, R. H., Gregg, M. D., Laurent-Muehleisen, S. A., Brotherton, M. S., Impey, C. D., ...
We have used the VLA FIRST survey and the APM catalog of the POSS-I plates as the basis for constructing a new radio-selected sample of optically bright quasars. This is the first radio-selected...
The Radio Afterglow and the Host Galaxy of the X-Ray Rich GRB 981226 (1999)
Frail, D. A., Kulkarni, S. R., Bloom, J. S., Djorgovski, S. G., Gorjian, V., Gal, R. R., ...
We report the discovery of a radio transient VLA 232937.2-235553, coincident with the proposed X-ray afterglow for the gamma-ray burst GRB 981226. This GRB has the highest ratio of X-ray to gamma-ray...
Helium abundance in the most metal-deficient blue compact galaxies: I Zw 18 and SBS 0335-052 (1999)
Izotov, Y. I., Chaffee, F. H., Foltz, C. B., Green, R. F., Guseva, N. G., Thuan, T. X.
We present high-quality spectroscopic observations of the two most-metal deficient blue compact galaxies known, I Zw 18 and SBS 0335-052 to determine the helium abundance. The underlying stellar...
The Lyman-alpha Forest and Heavy Element Systems of GB1759+7539 (1999)
Outram, P. J., Chaffee, F. H., Carswell, R. F.
(abridged) We present observations of the high-redshift QSO GB1759+7539 (z=3.05) obtained with HIRES on the Keck 10m telescope. The spectrum has a resolution of FWHM = 7 km/s, and a typical...
SBS 0335-052W - an Extremely Low Metallicity Dwarf Galaxy (1999)
Lipovetsky, V. A., Chaffee, F. H., Izotov, Y. I., Foltz, C. B., Kniazev, A. Y., Hopp, U.
We present Multiple Mirror Telescope (MMT) and Keck II telescope spectrophotometry and 3.5m Calar Alto telescope R, I photometry of the western component of the extremely low-metallicity blue compact...
Keck Spectroscopy and NICMOS Photometry of a Redshift z=5.60 Galaxy (1998)
Weymann, R. J., Stern, D., Bunker, A., Spinrad, H., Chaffee, F. H., Thompson, R. I., ...
We present Keck LRIS spectroscopy along with NICMOS F110W (~J) and F160W (~H) images of the galaxy HDF4-473.0 (hereafter 4-473) in the Hubble Deep Field, with a detection of an emission line...
A spectroscopic study of UM 673 A and B - On the size of Lyman-alpha clouds (1992)
Smette, A, Surdej, Jean, Shaver, P A, Foltz, C B, Chaffee, F H, Weymann, R J, ...
The Ly-alpha forest spectra obtained for the A and B images of the gravitationally lensed high-redshift quasar UM 673 are investigated, and higher resolution data of the brightest (A) image are...
A Spectroscopic Study of UM673 A &B: on the size of Lyman- alpha Clouds (1991)
Smette, A, Surdej, Jean, Shaver, P A, Foltz, C B, Chaffee, F H, Weymann, R J, ...
Quasar Absorption Lines, Proceedings of the ESO Mini-Workshop held