The VISTA IR camera software design

Beard, S. M.; McLay, Stewart; Stewart, Malcolm; Bissonauth, Nirmal; Biereichel, P.

doi:10.1117/12.551328

Cited by 3 publications

(3 citation statements)

References 13 publications

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“…The design of the camera is covered by Dalton et al 32,33 , Egan et al 34 , Caldwell et al 35 , Beard et al 36 , and Edeson et al 37 , and Dalton et al 38 report on the camera commissioning at this meeting.…”

Section: Cameramentioning

confidence: 98%

VISTA: status and performance

Emerson

Sutherland

2010

SPIE Proceedings

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VISTA, the Visible and Infrared Survey Telescope for Astronomy, is a 4-m class 1.65-degree wide field near-IR survey telescope with 0.34 arcsec pixels. VISTA was successfully commissioned and has been making surveys since 15 October 2009, and was formally accepted as a part of ESO's Cerro Paranal Observatory on 10 December 2009. We summarise the design and build process, report on commissioning and the as-built status. The most novel aspects of the system design have proved to all work well. We report the measured on-sky system performance that confirms that VISTA works as expected.

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Section: Cameramentioning

confidence: 98%

VISTA: status and performance

Emerson

Sutherland

2010

SPIE Proceedings

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“…Specifically, this catalog includes the u * band from MegaCam on the Canada-Hawaii-France Telescope CHFT (Boulade et al 2003), 6 broad optical bands (B, V , r, i + , z ++ ), 12 median, and 2 narrow bands from the Suprime-Cam on the Subaru telescope (Taniguchi et al 2007(Taniguchi et al , 2015, as well as the Y band from the Hyper Suprime-Cam/Subaru (Miyazaki et al 2012), which is slightly bluer than the Y filter from VIRCAM. The COSMOS2015 also includes near-IR YJHK s band from VIRCAM on the VISTA telescope (Beard et al 2004;McCrackene et al 2012), and the H and K s bands from WIRCam/CFHT (Puget et al 2004;McCracken et al 2010). Finally, the catalog includes the mid-IR Spitzer IRAC channels centered at 3.6 and 4.5 μm (ch1 and ch2, respectively; Fazio et al 2004).…”

Section: Simulated Lightconementioning

confidence: 99%

Estimating Galaxy Parameters with Self-organizing Maps and the Effect of Missing Data

La Torre,

Sajina,

Goulding

et al. 2024

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The current and upcoming large data volume galaxy surveys require the use of machine-learning techniques to maximize their scientific return. This study explores the use of Self-Organizing Maps (SOMs) to estimate galaxy parameters with a focus on handling cases of missing data and providing realistic probability distribution functions for the parameters. We train an SOM with a simulated mass-limited lightcone assuming a ugrizY JHK s +IRAC data set, mimicking the Hyper Suprime-Cam Deep joint data set. For parameter estimation, we derive SOM likelihood surfaces considering photometric errors to derive total (statistical and systematic) uncertainties. We explore the effects of missing data, including which bands are particularly critical to the accuracy of the derived parameters. We demonstrate that the parameter recovery is significantly better when the missing bands are “filled in” rather than if they are completely omitted. We propose a practical method for such recovery of missing data.

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“…The wavefront sensing software, as with the rest of the IR Camera software, will be based on the VLT software 5,6 . The latter is modular in design and has been used with slight modifications on several ESO telescopes.…”

Section: Software Designmentioning

confidence: 99%

Wavefront sensing within the VISTA infrared camera

Clark

Berry

Bingham³

et al. 2004

SPIE Proceedings

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VISTA is a 4-metre survey telescope currently being constructed on the NTT peak of ESO's Cerro Paranal Observatory. The telescope will be equipped with a dedicated infrared camera providing images of a 1.65 degree field of view. The telescope and camera are of an innovative f/3.26 design with no intermediate focus and no cold stop. The mosaic of 16 IR detectors is located directly at Cassegrain focus and a novel baffle arrangement is used to suppress stray light within the cryostat. The pointing and alignment of the telescope and camera is monitored by wavefront sensing elements within the camera cryostat itself. This paper describes the optical, mechanical, electronic and thermal design of the combined curvature sensor and auto-guider units positioned at the periphery of the camera field of view. Centroid and image aberration data is provided to the telescope control system allowing real time correction of pointing and alignment of the actively positioned M2 unit. Also described are the custom optics, mounted in the camera filter wheel, which are used to perform near on-axis high order curvature sensing. Analysis of the corresponding defocused images allows calibration tables of M1 actuator positions to be constructed for varying telescope declination and temperature.

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The VISTA IR camera software design

Cited by 3 publications

References 13 publications

VISTA: status and performance

VISTA: status and performance

Estimating Galaxy Parameters with Self-organizing Maps and the Effect of Missing Data

Wavefront sensing within the VISTA infrared camera

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