Results 101 to 110 of about 313,515 (389)

Overlapping Open Clusters NGC 1750 and NGC 1758 behind the Taurus Dark Clouds. II. CCD Photometry in the Vilnius System

Open Astronomy, 2003
Seven-color photometry in the Vilnius system has been obtained for 420 stars down to V = 16 mag in the area containing the overlapping open clusters NGC 1750 and NGC 1758 in Taurus.
Straižys V., Kazlauskas A., Černiauskas A., Boyle R. P., Vrba F. J., Philip A. G. Davis, Laugalys V., Černis K., Smriglio F.   +8 more
doaj   +1 more source

Constant enzymatic in situ production of H₂O₂ for an Unspecific Peroxygenase by an L‐amino acid oxidase

Advanced Synthesis &Catalysis, Accepted Article.
Unspecific Peroxygenases have been the subject of a lot of research in the recent past as they offer opportunities for green hydroxylation reactions using hydrogen peroxide (H₂O₂) as donor. A striking problem of UPOs is their low stability against their own co‐substrate H₂O₂.
Simon Last, Tobias Heinks, Niklas Dietz, Simon Koopmeiners, Gabriele Fischer von Mollard, Martin Weissenborn, Jan von Langermann   +6 more
wiley   +1 more source

Selecting a Photometric System for Gaia: C, N, O and Alpha-Process Elements

Open Astronomy, 2003
The sensitivity of stellar spectra to C, N, O and α-process element abundances is discussed with the aim of taking this effect into account when selecting a photometric system for the Gaia orbiting observatory.
Tautvaišienė G., Edvardsson B., Bartašiūtė S.   +2 more
doaj   +1 more source

Deep Learning Methods for Calibrated Photometric Stereo and Beyond [PDF]

arXiv, 2022
Photometric stereo recovers the surface normals of an object from multiple images with varying shading cues, i.e., modeling the relationship between surface orientation and intensity at each pixel. Photometric stereo prevails in superior per-pixel resolution and fine reconstruction details. However, it is a complicated problem because of the non-linear
arxiv  

A Portable and Low‐Cost Single Board Computer‐Based Spectrophotometric Platform for Optical Analysis in the UV and Visible Range

Advanced Sensor Research, EarlyView.
The increasing power of consumer electronics drives innovation in research. Here, a low‐cost (<€100), portable UV–vis spectrophotometric device is presented using Raspberry Pi and the AS7341 sensor. The system matches commercial spectrophotometers in performance and successfully analyzes wine samples and DNA oligonucleotides.
Alessandro Tonelli, Anna Tortone, Alessandro Grazioli, Francesco Pasquali, Michele Sozzi, Alessandro Candiani, Luca Capelli, Alessandro Bertucci   +7 more
wiley   +1 more source

Fast CCD Photometry in the Taiwan-America Occultation Survey

Open Astronomy, 2003
We describe the efforts of the Taiwan-America Occultation Survey (TAOS) project to develop a data acquisition and analysis scheme for fast CCD imaging photometry.
Chen W. P., Zhang Z. W., King S. K., Alcock C., Byun Y. I., Cook K. H., Dave R., Giammarco J., Lee T., Lehner M., Liang C., Lissauer J., Marshall S., Pater I. de, Porrata R., Rice J., Wang A., Wang S. Y., Wen C. Y.   +18 more
doaj   +1 more source

The 1.6um Bump as a Photometric Redshift Indicator [PDF]

, 2002
I describe the principle of using the 1.6um H- spectral feature as a photometric redshift indicator and demonstrate that the technique holds promise by successfully recovering the redshifts of a small sample of z=0-1 galaxies using only their infrared (JHKL) photometry. I then consider the applicability of the technique to the 3.6--8um SIRTF filter set
arxiv   +1 more source

The MUCHFUSS photometric campaign [PDF]

Astronomy & Astrophysics, 2018
Hot subdwarfs (sdO/Bs) are the helium-burning cores of red giants, which have lost almost all of their hydrogen envelope. This mass loss is often triggered by common envelope interactions with close stellar or even substellar companions. Cool companions like late-type stars or brown dwarfs are detectable via characteristic light-curve variations like ...
Stephan Geier, R. Gerber, Ulrich Heber, E. Ziegerer, D. Schneider, V. Schaffenroth, O. Cordes   +6 more
openaire   +5 more sources

Essential Role of the Anterior Piriform Cortex in Mediating Social Novelty Output via a Top–Down Circuit

Advanced Science, EarlyView.
The anterior piriform cortex (APC) exhibits distinct neural firings and calcium transients in response to familiar and novel mice, with a more robust response to the novel one. Selectively inhibiting APC pyramidal neurons disrupt social novelty recognition without impairing basic odor discrimination.
Jingwei Zhou, Zhaoyang Yin, Zhiyun Chen, Hanyu Fu, Qun Li, Shan Li, Ying Zhang, Xianzhi Zhang, Dewei Tang, Anan Li, Dejuan Wang   +10 more
wiley   +1 more source

The Reduction of CCD Images for Stellar Photometry on the Vatt

Open Astronomy, 2003
We briefly describe a method of organizing all the star field exposures taken in a complete CCD observational run. By a “CommandLog” (to be published in J. Astron.
Janusz R., Boyle R. P., Philip A. G. Davis   +2 more
doaj   +1 more source