Ground-Based Photometric Calibration of the Space Telescope CCD Camera

1989 ◽  
pp. 631-634
Author(s):  
D. A. Hunter ◽  
H. C. Harris ◽  
W. A. Baum ◽  
J. H. Jones ◽  
T. J. Kreidl
Keyword(s):  
Ccd Camera ◽  
Space Telescope ◽  
Photometric Calibration

scholarly journals Ground-Based Photometric Calibration of the Space Telescope CCD Camera

1989 ◽  
Vol 8 ◽  
pp. 631-634
Author(s):  
D.A. Hunter ◽  
H.C. Harris ◽  
W.A. Baum ◽  
J.H. Jones ◽  
T.J. Kreidl
Keyword(s):  
Hubble Space Telescope ◽  
Ccd Camera ◽  
Wide Field ◽  
Photometric System ◽  
Standard Star ◽  
Space Telescope ◽  
Ccd Imaging ◽  
Photometric Calibration ◽  
Imaging Instrument

The Wide-Field and Planetary Camera (WF/PC) is a CCD imaging instrument which is part of the Hubble Space Telescope. Ground-based observations have been made with a CCD system similar to those of the WF/PC in order to establish the standard star sequence to be used for in-flight photometric calibration. Because the WF/PC passbands differ from those in previous photometric use, the filters and CCDs will define a new photometric system. We outline here the procedures used to establish the calibration fields to be used in flight (see Harris et al. 1988 for additional details).

scholarly journals BVRI photometric calibration of the Nedeljkovic telescope

2021 ◽  
pp. 3-3
Author(s):  
A. Vudragovic ◽  
M. Jurkovic
Keyword(s):  
Ccd Camera ◽  
Color Correction ◽  
Photometric Calibration ◽  
Astronomical Station

We have done photometric calibration of the 60 cm Nedeljkovic telescope equipped with the FLI PL 230 CCD camera, mounted at the Astronomical Station Vidojevica (Serbia), using standard stars from the Landolt catalog. We have imaged 31 fields of standard stars using Johnson's BVRI filters during three nights in August 2019. We have measured both extinction and color correction. Relating our calibrated magnitudes to the magnitudes of standard stars from the Landolt catalog, we have achieved accuracy of 2%-5% for the BVRI magnitudes.

MARCS: Model Stellar Atmospheres and Their Application to the Photometric Calibration of the Spitzer Space Telescope Infrared Spectrograph (IRS)

2004 ◽  
Vol 154 (1) ◽  
pp. 408-412 ◽  
Author(s):  
L. Decin ◽  
P. W. Morris ◽  
P. N. Appleton ◽  
V. Charmandaris ◽  
L. Armus ◽  
...  
Keyword(s):  
Stellar Atmospheres ◽  
Spitzer Space Telescope ◽  
Space Telescope ◽  
Photometric Calibration

scholarly journals The SMC Cluster Lindsay 11

1988 ◽  
Vol 126 ◽  
pp. 575-576
Author(s):  
J. Buttress ◽  
R. D. Cannon ◽  
W. K. Griffiths
Keyword(s):  
Hubble Space Telescope ◽  
Ccd Camera ◽  
Small Cluster ◽  
Western Region ◽  
Space Telescope ◽  
Preliminary Study ◽  
The Western Region ◽  
Using Data

This small cluster is situated in the western region of the SMC at α = 0h 26m 13s, ε = −73°, 1′, 20″ (1950) and has been chosen for study in the initial post-launch period of the Hubble Space Telescope. This preliminary study was made using data obtained using a CCD camera on the SAAO 1 m telescope in October 1984.

WFC3/HST photometric calibration: color terms for the ultra-violet filters

2018 ◽  
Vol 14 (A30) ◽  
pp. 492-492
Author(s):  
Annalisa Calamida
Keyword(s):  
Spectral Type ◽  
Count Rate ◽  
Hubble Space Telescope ◽  
Ultra Violet ◽  
Worst Case ◽  
Space Telescope ◽  
Color Terms ◽  
Photometric Calibration ◽  
Color Term ◽  
Rate Ratios

Color term corrections for magnitudes measured on the UVIS2 relative to the UVIS1 detector of the WFC3 camera on board Hubble Space Telescope are needed for three ultra-violet filters, namely F218W, F225W, and F275W. The two WFC3 detectors have different quantum efficiencies in the ultra-violet regime (λ < 4,000 Å), resulting in different count rate ratios as a function of the spectral type of the source. In the worst case, for cool red sources measured on UVIS2, there is a magnitude offset relative to UVIS1 up to ∼ 0.08 mag, while the offset is negligible for hot (Teff ≳ 30,000 K) blue sources.

scholarly journals A synthetic Roman Space Telescope High-Latitude Imaging Survey: simulation suite and the impact of wavefront errors on weak gravitational lensing

2020 ◽  
Vol 501 (2) ◽  
pp. 2044-2070
Author(s):  
M A Troxel ◽  
H Long ◽  
C M Hirata ◽  
A Choi ◽  
M Jarvis ◽  
...  
Keyword(s):  
Gravitational Lensing ◽  
Stage Iv ◽  
Image Motion ◽  
Weak Lensing ◽  
Model Errors ◽  
Space Telescope ◽  
Photometric Calibration ◽  
Survey Strategy ◽  
The Impact ◽  
Image Simulations

ABSTRACT The Nancy Grace Roman Space Telescope (Roman) mission is expected to launch in the mid-2020s. Its weak lensing program is designed to enable unprecedented systematics control in photometric measurements, including shear recovery, point spread function (PSF) correction, and photometric calibration. This will enable exquisite weak lensing science and allow us to adjust to and reliably contribute to the cosmological landscape after the initial years of observations from other concurrent Stage IV dark energy experiments. This potential requires equally careful planning and requirements validation as the mission prepares to enter its construction phase. We present a suite of image simulations based on galsim that are used to construct a complex, synthetic Roman weak lensing survey that incorporates realistic input galaxies and stars, relevant detector non-idealities, and the current reference 5-yr Roman survey strategy. We present a first study to empirically validate the existing Roman weak lensing requirements flowdown using a suite of 12 matched image simulations, each representing a different perturbation to the wavefront or image motion model. These are chosen to induce a range of potential static and low- and high-frequency time-dependent PSF model errors. We analyse the measured shapes of galaxies from each of these simulations and compare them to a reference, fiducial simulation to infer the response of the shape measurement to each of these modes in the wavefront model. We then compare this to existing analytic flowdown requirements, and find general agreement between the empirically derived response and that predicted by the analytic model.

Status of the CCD camera for the eROSITA space telescope

2011 ◽  
Author(s):  
Norbert Meidinger ◽  
Robert Andritschke ◽  
Johannes Elbs ◽  
Stefanie Granato ◽  
Olaf Hälker ◽  
...  
Keyword(s):  
Ccd Camera ◽  
Space Telescope
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