Narrowband Filter Photometry of Five Comets

Icarus ◽  
2000 ◽  
Vol 145 (2) ◽  
pp. 591-600 ◽  
Author(s):  
T Ellis
Keyword(s):  
Filter Photometry ◽  
Narrowband Filter

Photo-electric Hβ and uvby photometry

1966 ◽  
Vol 24 ◽  
pp. 170-180
Author(s):  
D. L. Crawford
Keyword(s):  
Narrow Band ◽  
Line Strength ◽  
Interference Filter ◽  
B Stars ◽  
Relative Line ◽  
The Mean ◽  
F Stars ◽  
Two Parameters ◽  
Filter Photometry ◽  
The Continuum

Early in the 1950's Strömgren (1, 2, 3, 4, 5) introduced medium to narrow-band interference filter photometry at the McDonald Observatory. He used six interference filters to obtain two parameters of astrophysical interest. These parameters he calledlandc, for line and continuum hydrogen absorption. The first measured empirically the absorption line strength of Hβby means of a filter of half width 35Å centered on Hβand compared to the mean of two filters situated in the continuum near Hβ. The second index measured empirically the Balmer discontinuity by means of a filter situated below the Balmer discontinuity and two above it. He showed that these two indices could accurately predict the spectral type and luminosity of both B stars and A and F stars. He later derived (6) an indexmfrom the same filters. This index was a measure of the relative line blanketing near 4100Å compared to two filters above 4500Å. These three indices confirmed earlier work by many people, including Lindblad and Becker. References to this earlier work and to the systems discussed today can be found in Strömgren's article inBasic Astronomical Data(7).

Narrowband Filter Based on Triangular Tri-Core Fiber Long-Period Gratings

2021 ◽  
Author(s):  
Huiqin Peng ◽  
Yunhe Zhao ◽  
Wei Wang ◽  
Yunqi Liu ◽  
Yongsheng Yang
Keyword(s):  
Long Period ◽  
Long Period Gratings ◽  
Core Fiber ◽  
Narrowband Filter

scholarly journals Hybrid 3-D Spectrophotometry of Emission-Line Nebulae at Ohio State

1995 ◽  
Vol 149 ◽  
pp. 167-171
Author(s):  
Richard W. Pogge ◽  
Nancy Joanne Lame
Keyword(s):  
Emission Line ◽  
Planetary Nebulae ◽  
Hii Regions ◽  
Ohio State University ◽  
State University ◽  
Considerable Success ◽  
Fabry Perot ◽  
The Ohio State University ◽  
Scientific Results ◽  
Narrowband Filter

AbstractA program of 3-D spectrophotometry of emission nebulae being carried out at the Ohio State University will be described. We have had considerable success combining Fabry-Perot imaging, long-slit spectroscopy, and narrowband filter imaging into a hybrid 3-D spectroscopic approach that we have used to obtain detailed spectrophotometric maps of the density, temperature, extinction, and ionization in HII regions and Planetary Nebulae. The centerpiece instrument of this effort, the OSU Imaging Fabry-Perot Spectrograph (IFPS), will be described, and scientific results illustrative of our work will be presented.

scholarly journals NARROWBAND FILTER IN A HETEROSTRUCTURED MULTILAYER CONTAINING ULTRATHIN METALLIC FILMS

2009 ◽  
Vol 96 ◽  
pp. 329-346 ◽  
Author(s):  
Chi-Chung Liu ◽  
Yang-Hua Chang ◽  
Tzong-Jer Yang ◽  
Chien-Jang Wu
Keyword(s):  
Metallic Films ◽  
Narrowband Filter

scholarly journals Comet Bennett 1969 i: Narrow-Band Filter Photometry 0.3 to 1.1 Microns

1971 ◽  
Vol 83 ◽  
pp. 93 ◽  
Author(s):  
Torrence V. Johnson ◽  
Larry A. Lebofsky ◽  
Thomas B. McCord
Keyword(s):  
Narrow Band ◽  
Band Filter ◽  
Narrow Band Filter ◽  
Filter Photometry

Spectrum-Continuous Narrowband Filter with Enhanced Flat-top Passband and Sharp Roll-off Performance

2021 ◽  
Author(s):  
Dong Liang ◽  
qinggui tan ◽  
wei jiang ◽  
Wu Zhang ◽  
Di Wang ◽  
...  
Keyword(s):  
Narrowband Filter

Effects and Corrections of Incidence Light Cone on Transmission Characteristics of Narrowband Filter

2014 ◽  
Vol 34 (1) ◽  
pp. 0131001
Author(s):  
张军强 Zhang Junqiang ◽  
王笑夷 Wang Xiaoyi ◽  
张新洁 Zhang Xinjie ◽  
颜昌翔 Yan Changxiang ◽  
张滨 Zhang Bin
Keyword(s):  
Light Cone ◽  
Transmission Characteristics ◽  
Narrowband Filter

Tunable Narrowband Filter Based on Guided Mode Resonance

2017 ◽  
Vol 46 (12) ◽  
pp. 1223001
Author(s):  
黑徐伟 HEI Xu-wei ◽  
章羚璇 ZHANG Ling-xuan ◽  
刘继红 LIU Ji-hong ◽  
葛志强 GE Zhi-qiang ◽  
李思奇 LI Si-qi ◽  
...  
Keyword(s):  
Guided Mode ◽  
Guided Mode Resonance ◽  
Narrowband Filter
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