Results 11 to 20 of about 186,707 (292)

Fixing the U-band photometry of Type Ia supernovae [PDF]

, 2012
We present previously unpublished photometry of supernovae 2003gs and 2003hv. Using spectroscopically-derived corrections to the U-band photometry, we reconcile U-band light curves made from imagery with the Cerro Tololo 0.9-m, 1.3-m and Las Campanas 1-m
Bastola, Deepak, Espinoza, Juan, Gonzalez, David, Gonzalez, Luis, Gonzalez, Sergio, Hamuy, Mario, Hsiao, Eric Y., Krisciunas, Kevin, Morrell, Nidia, Phillips, Mark M., Suntzeff, Nicholas B.   +10 more
core   +3 more sources

Identification of the Mixing Ratios of Beer-Mixed Beverages by UV/VIS Spectroscopy

Beverages, 2023
UV/VIS spectroscopy was used in conjunction with a calibration method to determine the mixing ratio of samples of beer-mixed drinks with mineral water (sour Radler beers) from the food service industry.
Sophia Stinus, Pauline Erban, Josef Diebold, Magnus S. Schmidt   +3 more
doaj   +1 more source

Galaxy surface photometry [PDF]

, 1999
We describe galaxy surface photometry based on fitting ellipses to the isophotes of the galaxies. Example galaxies with different isophotal shapes are used to illustrate the process, including how the deviations from elliptical isophotes are quantified ...
Jorgensen, Inger, Milvang-Jensen, Bo
core   +2 more sources

Optical Properties of Light-Scattering Standards for CCD Photometry

Sensors, 2023
This paper analyzes the light-scattering standards currently used for calibration (verification) and systematic research in photo and spectrophotometry tools.
Denys Bondariev, Natalia Bezugla, Paweł Komada, Nataliia Stelmakh, Mykhailo Bezuglyi   +4 more
doaj   +1 more source

Variable Stars in the Globular Cluster M5. Application of the Image Subtraction Method [PDF]

, 1999
We present $V$-band light curves of 61 variables from the core of the globular cluster M5 obtained using a newly developed image subtraction method (ISM). Four of these variables were previously unknown.
A. Olech, Alard C., Alard C., Alard C., Alcock C., C. Alard, Caputo F., Drissen L., I. B. Thompson, J. Kaluzny, Kaluzny J., Kaluzny J., Olech A., P. R. Wozniak, Reid I. N., Sandquist E., Sawyer Hogg H., Schechter P., Wozniak P. R.   +18 more
core   +3 more sources

Overview of Gaia Multi-Color Photometry

Open Astronomy, 2003
Gaia will obtain multi-color photometry for astrometric and astrophysical purposes. A photometry in five broad bands and with high angular resolution will be obtained after every astrometric observation of a star, especially for the sake of correcting ...
Høg Erik
doaj   +1 more source

Spitzer Photometry of WISE-Selected Brown Dwarf and Hyper-Luminous Infrared Galaxy Candidates [PDF]

, 2012
We present Spitzer 3.6 and 4.5 $\mu$m photometry and positions for a sample of 1510 brown dwarf candidates identified by the WISE all-sky survey. Of these, 166 have been spectroscopically classified as objects with spectral types M(1), L(7), T(146), and ...
A. Mainzer, Andrew Blain, Ashby, Bridge, Burgasser, Burgasser, Burgasser, Carol Lonsdale, Carrie R. Bridge, Chao-Wei Tsai, Christopher R. Gelino, Cushing, Cutri, Daniel Stern, Deborah Padgett, Dominic Benford, Edward L. Wright, Eisenhardt, Eisenhardt, Eisenhardt, Emilio Donoso, Epchtein, Faherty, Fazio, Gelino, Gregory Mace, J. Davy Kirkpatrick, Jingwen Wu, Ken Marsh, Kirkpatrick, Kirkpatrick, Kirkpatrick, Kirkpatrick, Kirkpatrick, Lin Yan, Mainzer, Martin Cohen, Metchev, Michael C. Cushing, Michael E. Ressler, Michael F. Skrutskie, Morgan, Peter R. M. Eisenhardt, Roc M. Cutri, Roger L. Griffith, Sara Petty, Skrutskie, Spencer A. Stanford, Stern, Thomas H. Jarrett, Wright, Wright, Wu, York   +53 more
core   +5 more sources

Photometry as a proxy for stellar activity in radial velocity analyses

, 2020
Stellar activity remains a limiting factor in measuring precise planet parameters from radial velocity spectroscopy, not least in the search for Earth mass planets orbiting in the habitable zones of Sun-like stars.
Crossfield, Ian J. M., Kosiarek, Molly R.   +1 more
core   +1 more source

NORAD TLE Type Orbit Determination of LEO Satellites Using GPS Navigation Solutions [PDF]

Journal of Astronomy and Space Sciences, 2002
NORAD Two Line Elements (TLE) are widely used for the increasing number of small satellite mission operations and analysis. However, due to the irregular periodicity of generation of the NORAD TLE, a new TLE that is independent of NORAD is required.
Chang-Hwa Cho, Byoung-Sun Lee, Jeong-Sook Lee, Jae-Hoon Kim, Kyu-Hong Choi   +4 more
doaj   +1 more source

Sobre a Dosagem Fotométrica do Cobre em Águas

Brazilian Archives of Biology and Technology, 2001
The author presents an analytic process for copper quantitative determination in mineral and potable waters, based in the reaction of the cation copper with sodium diethyl-dithio carbamate. Due to the presence of certain elements common in water, such as
Reinaldo Spitzner
doaj   +1 more source