High-Time-Resolution Astrophysics using the Thai 2.4-m Telescope with Ultraspec

2017 ◽  
Vol 14 (S339) ◽  
pp. 185-188
Author(s):  
P. Irawati
Keyword(s):  
Time Resolution ◽  
High Speed ◽  
Period Change ◽  
Low Noise ◽  
High Time ◽  
High Time Resolution ◽  
Third Body ◽  
Data Set ◽  
High Speed Photometry

AbstractThe Thai National Observatory (TNO) is equipped with a 2.4-m Ritchey-Chretien telescope and the high-speed versatile Ultraspec camera. The instrument employs a low-noise frame-transfer EMCCD, suitable for the observation of faint objects and for high-time-resolution astrophysics. We present some of the results obtained in the first four years of operation, focusing particularly on fast photometry of lunar and stellar occultations, and follow-up efforts on a few white-dwarf binaries. Among the latter is the polar cataclysmic variable UZ For. This system displays period changes and is suspected of hosting circumbinary planets. Our high-speed photometry data show a decreasing trend in the O–C diagram of UZ For. Using our new data set, we will investigate whether the period change in this binary is due to a possible third body, or to other mechanism(s).

scholarly journals CUTLASS HF radar observations of high-latitude azimuthally propagating vortical currents in the nightside ionosphere during magnetospheric substorms

2000 ◽  
Vol 18 (6) ◽  
pp. 640-652 ◽  
Author(s):  
J. A. Wild ◽  
T. K. Yeoman
Keyword(s):  
Electric Fields ◽  
Time Resolution ◽  
High Latitude ◽  
High Speed ◽  
Radar Data ◽  
Hf Radar ◽  
High Time ◽  
Vortical Flow ◽  
High Time Resolution ◽  
Magnetospheric Substorms

Abstract. High-time resolution CUTLASS observations and ground-based magnetometers have been employed to study the occurrence of vortical flow structures propagating through the high-latitude ionosphere during magnetospheric substorms. Fast-moving flow vortices (~800 m s-1) associated with Hall currents flowing around upward directed field-aligned currents are frequently observed propagating at high speed (~1 km s-1) azimuthally away from the region of the ionosphere associated with the location of the substorm expansion phase onset. Furthermore, a statistical analysis drawn from over 1000 h of high-time resolution, nightside radar data has enabled the characterisation of the bulk properties of these vortical flow systems. Their occurrence with respect to substorm phase has been investigated and a possible generation mechanism has been suggested.Key words: Ionosphere (auroral ionosphere; electric fields and currents) · Magnetospheric physics (storms and substorms)

scholarly journals High‐speed MCP anodes for high time resolution low‐energy charged particle spectrometers

2017 ◽  
Vol 122 (2) ◽  
pp. 1816-1830 ◽  
Author(s):  
Yoshifumi Saito ◽  
Shoichiro Yokota ◽  
Kazushi Asamura ◽  
Amanda Krieger
Keyword(s):  
Charged Particle ◽  
Time Resolution ◽  
High Speed ◽  
Low Energy ◽  
High Time ◽  
High Time Resolution

scholarly journals Investigations of Protein and Biomolecules using a 280 nm or 295 nm Picosecond Laser for High Speed Measurements and High Time Resolution

2020 ◽  
Vol 118 (3) ◽  
pp. 472a
Author(s):  
Christian Oelsner ◽  
Eugeny Ermilov ◽  
Thomas Schönau ◽  
Dietmar Klemme ◽  
Guillaume Delpont ◽  
...  
Keyword(s):  
Time Resolution ◽  
High Speed ◽  
Picosecond Laser ◽  
High Time ◽  
High Time Resolution

Solar Corona Investigation by the Coronal Line Photometer at Lomnický Peak

1994 ◽  
Vol 144 ◽  
pp. 431-434
Author(s):  
M. Minarovjech ◽  
M. Rybanský
Keyword(s):  
Solar Corona ◽  
Time Resolution ◽  
Active Regions ◽  
High Time ◽  
High Time Resolution ◽  
List Type ◽  
Type Number ◽  
Coronal Line ◽  
Global Cycle

AbstractThis paper deals with a possibility to use the ground-based method of observation in order to solve basic problems connected with the solar corona research. Namely:1.heating of the solar corona2.course of the global cycle in the corona3.rotation of the solar corona and development of active regions.There is stressed a possibility of high-time resolution of the coronal line photometer at Lomnický Peak coronal station, and use of the latter to obtain crucial observations.

Discovery of the fast optical variability of GRB 080319B and the prospects for wide-field optical monitoring with high time resolution

2010 ◽  
Vol 180 (4) ◽  
pp. 424 ◽  
Author(s):  
G.M. Beskin ◽  
S.V. Karpov ◽  
S.F. Bondar ◽  
V.L. Plokhotnichenko ◽  
A. Guarnieri ◽  
...  
Keyword(s):  
Time Resolution ◽  
High Time ◽  
High Time Resolution ◽  
Optical Variability ◽  
Wide Field ◽  
Optical Monitoring

scholarly journals Detecting telecom single photons with 99.5−2.07+0.5% system detection efficiency and high time resolution

APL Photonics ◽  
2021 ◽  
Vol 6 (3) ◽  
pp. 036114
Author(s):  
J. Chang ◽  
J. W. N. Los ◽  
J. O. Tenorio-Pearl ◽  
N. Noordzij ◽  
R. Gourgues ◽  
...  
Keyword(s):  
Time Resolution ◽  
Detection Efficiency ◽  
High Time ◽  
High Time Resolution ◽  
Single Photons

High-time-resolution PM2.5 source apportionment based on multi-model with organic tracers in Beijing during haze episodes

2021 ◽  
Vol 772 ◽  
pp. 144766
Author(s):  
Lingling Lv ◽  
Yingjun Chen ◽  
Yong Han ◽  
Min Cui ◽  
Peng Wei ◽  
...  
Keyword(s):  
Source Apportionment ◽  
Time Resolution ◽  
High Time ◽  
High Time Resolution
Sign in / Sign up

Export Citation Format

Share Document