Results 81 to 90 of about 5,753 (177)

Wind Accretion and State Transitions in Cygnus X-1

, 2002
We present the results of a spectroscopic monitoring program (from 1998 to 2002) of the H-alpha emission strength in HDE 226868, the optical counterpart of the black hole binary, Cyg X-1. The H-alpha profiles consist of (1) a P Cygni component associated
B. Csak, Bondi H., Brocksopp C., C. T. Bolton, D. R. Gies, D. W. Wingert, Ebisawa K., Herrero A., J. R. Thomson, Kaper L., L. L. Kiss, Lamers H. J. G. L. M., Liang E. P., M. V. McSwain, Meyer F., P. J. Wiita, Pooley G., Poutanen J., Puls J., R. L. Riddle, Voloshina I. B., W. Huang, Z. Wang   +22 more
core   +1 more source

Echelle grating silicon multi/demultiplexers with single-reflection total internal reflectors

Optics Express, 2012
We present a silicon-on-insulator Echelle grating 8-channel demutiplexer showing characteristic features, average insertion loss 2.4 dB measured at 1520~1570 nm, adjacent channel crosstalk 15-18 dB, and channel spacing 11.9 nm. Our Echelle grating is remarked by a total internal reflector (TIR) which reflects incident light by a single reflection in ...
Park, Sahnggi, Kim, Sang-Gi, Park, Jeagyu, Kim, Gyungock   +3 more
openaire   +3 more sources

Observing facilities at the European Southern Observatory (ESO) in Chile for cometary observations [PDF]

The (ESO) is located on the mountain La Silla (geographical coordinates: 4h42m55s10 west, -29 deg 15' 25".8 south, 2400 m elevation. The size of the telescopes ranges from a 40 cm Astrograph to the 3.6 m Richey-Chretien telescope.
Kohoutek, L., Rahe, J., Schnur, G. F. O.
core   +1 more source

Preliminary design of the Visible Spectro-Polarimeter for the Advanced Technology Solar Telescope

, 2012
The Visible Spectro-Polarimeter (ViSP) is one of the first light instruments for the Advanced Technology Solar Telescope (ATST). It is an echelle spectrograph designed to measure three different regions of the solar spectrum in three separate focal ...
Casini, Roberto, de Wijn, Alfred G., Huang, Pei, Nelson, Peter G.   +3 more
core   +1 more source

Internal kinematic and physical properties in a BCD galaxy: Haro 15 in detail [PDF]

, 2010
We present a detailed study of the kinematic and physical properties of the ionized gas in multiple knots of the blue compact dwarf galaxy Haro 15.
Bosch, G., Diaz, A. I., Firpo, V., Hagele, G. F., Morrell, N.   +4 more
core  

Grisms Developed for FOCAS

, 2011
Faint Object Camera and Spectrograph (FOCAS) is a versatile common-use optical instrument for the 8.2m Subaru Telescope, offering imaging and spectroscopic observations.
Ebizuka, Noboru, Hattori, Takashi, Iye, Masanori, Kashikawa, Nobunari, Kashiwagi, Masako, Kawabata, Koji S., Kodate, Kashiko, Oka, Keiko, Yamada, Akiko   +8 more
core   +1 more source

87th Annual Meeting of the Meteoritical Society 2025: Abstracts

Meteoritics &Planetary Science, Volume 60, Issue S1, Page 30-350, August 2025.
wiley   +1 more source

Photoheliograph requirements for a spectrograph, November 1967 - June 1968 [PDF]

Preliminary design requirements and constraints for ATM ...
Persson, S. E.
core   +1 more source

Preliminary results on the characterization and performances of ZBLAN fiber for infrared spectrographs

, 2014
Present telescopes and future extremely large telescopes make use of fiber-fed spectrographs to observe at optical and infrared wavelengths. The use of fibers largely simplifies the interfacing of the spectrograph to the telescope.
Iuzzolino, M., Oliva, E., Sanna, N., Tozzi, A., Zangrilli, L.   +4 more
core   +1 more source

Light scattering from a diffractive-refractive intraocular lens: a goniometer-based approach for individual zone assessment. [PDF]

Biomed Opt Express, 2022
Łabuz G, van den Berg TJTP, Auffarth GU, Khoramnia R.   +3 more
europepmc   +1 more source