The Roman space telescope coronagraph technology demonstration: current status and relevance to future missions

2021 ◽  
Author(s):  
Bertrand Mennesson ◽  
Vanessa Bailey ◽  
Rob Zellem ◽  
Neil Zimmerman ◽  
Marie Ygouf ◽  
...  
Keyword(s):  
Current Status ◽  
Space Telescope ◽  
Technology Demonstration

scholarly journals Current Status of the Astrometric Capabilities of the Hubble Space Telescope Fine Guidance Sensors

1991 ◽  
Vol 127 ◽  
pp. 68-76
Author(s):  
W.H. Jefferys ◽  
G.F. Benedict ◽  
R.L. Duncombe ◽  
O.G. Franz ◽  
L.W. Fredrick ◽  
...  
Keyword(s):  
Optical System ◽  
Reference Frames ◽  
Optical Axis ◽  
Hubble Space Telescope ◽  
Current Knowledge ◽  
Spherical Aberration ◽  
Radial Distance ◽  
Current Status ◽  
Space Telescope ◽  
Wavefront Error

AbstractThe Fine Guidance Sensors (FGSs) are the instrument of choice for most astrometric measurements with the Hubble Space Telescope (HST). The observed amount of spherical aberration in the Ritchey Chretien optical system does not affect positional measurements with perfectly aligned FGSs because they are interferometers. The FGSs combine wavefronts from points in the exit pupil with other points which are at the same radial distance from the optical axis. Asymmetric aberrations such as coma and astigmatism do affect the measured positions. The current knowledge of the HST wavefront error, the FGS operation and the implications for milliarcsecond relative astrometry are discussed. It is still planned to use the HST to tie the HIPPARCOS and VLBI Reference Frames together at the few milliarcsecond level.

scholarly journals Emergent Exoplanet Flux: Review of the Spitzer Results

2008 ◽  
Vol 4 (S253) ◽  
pp. 197-207 ◽  
Author(s):  
Drake Deming
Keyword(s):  
Extrasolar Planets ◽  
Physical Nature ◽  
Current Status ◽  
Temperature Structure ◽  
Spitzer Space Telescope ◽  
Space Telescope ◽  
Hot Jupiters ◽  
Eclipse Observations

AbstractObservations using theSpitzer Space Telescopeprovided the first detections of photons from extrasolar planets.Spitzerobservations are allowing us to infer the temperature structure, composition, and dynamics of exoplanet atmospheres. The Spitzer studies extend from many hot Jupiters to the hot Neptune orbiting GJ436. Here I review the current status ofSpitzersecondary eclipse observations, and summarize the results from the viewpoint of what is robust, what needs more work, and what the observations are telling us about the physical nature of exoplanet atmospheres.

Current status and development tendency of image stabilization system of large aperture space telescope

2014 ◽  
Vol 7 (5) ◽  
pp. 739-748 ◽  
Author(s):  
曹小涛 CAO Xiao-tao ◽  
孙天宇 SUN Tian-yu ◽  
赵运隆 ZHAO Yun-long ◽  
王栋 WANG Dong ◽  
郭权锋 GUO Quan-feng
Keyword(s):  
Current Status ◽  
Stabilization System ◽  
Image Stabilization ◽  
Space Telescope ◽  
Large Aperture ◽  
Development Tendency

HUBBLE SPACE TELESCOPE VIA THE WEB

1994 ◽  
Vol 05 (05) ◽  
pp. 811-816
Author(s):  
CHRISTOPHER P. O’DEA
Keyword(s):  
Hubble Space Telescope ◽  
Information Service ◽  
Educational Material ◽  
Current Status ◽  
Scientific Instruments ◽  
Electronic Information ◽  
Space Telescope ◽  
Future Developments ◽  
Tiff Format ◽  
Space Telescope Science Institute

The Space Telescope Science Institute (STScI) makes available a wide variety of information concerning the Hubble Space Telescope (HST) via the Space Telescope Electronic Information Service (STEIS). STEIS is accessible via anonymous ftp, gopher, WAIS, and WWW. The information on STEIS includes how to propose for time on the HST, the current status of HST, reports on the scientific instruments, the observing schedule, data reduction software, calibration files, and a set of publicly available images in JPEG, GIF and TIFF format. STEIS serves both the astronomical community as well as the larger Internet community. WWW is currently the most widely used interface to STEIS. Future developments on STEIS are expected to include larger amounts of hypertext, especially HST images and educational material of interest to students, educators, and the general public, and the ability to query proposal status.

scholarly journals The Nancy Grace Roman Space Telescope Coronagraph Instrument (CGI) technology demonstration

2020 ◽  
Author(s):  
N. Jeremy Kasdin ◽  
Vanessa Bailey ◽  
Bertrand Mennesson ◽  
Robert Zellem ◽  
Marie Ygouf ◽  
...  
Keyword(s):  
Space Telescope ◽  
Technology Demonstration

scholarly journals Progress in Multi-Wavelength and Multi-Messenger Observations of Blazars and Theoretical Challenges

Galaxies ◽  
2019 ◽  
Vol 7 (1) ◽  
pp. 20 ◽  
Author(s):  
Markus Böttcher
Keyword(s):  
Gamma Ray ◽  
Theoretical Models ◽  
Current Status ◽  
Theoretical Understanding ◽  
Telescope Array ◽  
Space Telescope ◽  
X Ray ◽  
Cherenkov Telescope ◽  
Recent Advances ◽  
Multi Wavelength

This review provides an overview of recent advances in multi-wavelength and multi-messenger observations of blazars, the current status of theoretical models for blazar emission, and prospects for future facilities. The discussion of observational results will focus on advances made possible through the Fermi Gamma-Ray Space Telescope and ground-based gamma-ray observatories (H.E.S.S., MAGIC, VERITAS), as well as the recent first evidence for a blazar being a source of IceCube neutrinos. The main focus of this review will be the discussion of our current theoretical understanding of blazar multi-wavelength and multi-messenger emission, in the spectral, time, and polarization domains. Future progress will be expected in particular through the development of the first X-ray polarimeter, IXPE, and the installation of the Cherenkov Telescope Array (CTA), both expected to become operational in the early to mid 2020s.

Current status of special planetary and lunar theories and ephemerides

1966 ◽  
Vol 25 ◽  
pp. 266-267
Author(s):  
R. L. Duncombe
Keyword(s):  
Observational Data ◽  
Current Status ◽  
Numerical Errors

An examination of some specialized lunar and planetary ephemerides has revealed inconsistencies in the adopted planetary masses, the presence of non-gravitational terms, and some outright numerical errors. They should be considered of temporary usefulness only, subject to subsequent amendment as required for the interpretation of observational data.

Introduction to the Solar Space Telescope

2000 ◽  
Vol 179 ◽  
pp. 141-147
Author(s):  
G. Ai ◽  
S. Jin ◽  
S. Wang ◽  
B. Ye ◽  
S. Yang
Keyword(s):  
Solar Telescope ◽  
Basic Aspect ◽  
Space Telescope ◽  
Space Solar Telescope

AbstractThe design of the space solar telescope (SST) (phase B) has been completed. The manufacturing is under development. At the end of 2000, it will be assembled. The basic aspect will be introduced in this paper.

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