Pubblicazioni

Sono presenti le pubblicazioni avvenute grazie al lavoro professionale o amatoriale dei soci ARA.

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A mask quality control tool for the OSIRIS multi-object spectrograph

Scritto il 13 Nov 2012 alle 01:39 in Pubblicazioni

OSIRIS multi object spectrograph uses a set of user-customised-masks,
which are manufactured on-demand. The manufacturing process consists of
drilling the specified slits on the mask with the required accuracy.
Ensuring that slits are on the right place when observing is of vital
importance. We present a tool for checking the quality of the process of
manufacturing the masks which is based on analyzing the instrument
images obtained with the manufactured masks on place. The tool extracts
the slit information from these images, relates specifications with the
extracted slit information, and…

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J-PAS data management pipeline and archiving

Scritto il 13 Nov 2012 alle 01:39 in Pubblicazioni

J-PAS survey is going to observe 8000 deg<SUP>2</SUP> in 54 optical
narrow band filters plus 3 broad band ones. The survey will produce 1.2
PB of raw data in six years of observations. The treatment of about 1.5
TB per night, coming from the 14 detectors of the JPCam camera in the
JST/T250, plus one detector in the JAST/T80 camera, shall be performed
during the day after the operations. This contribution presents the
software and hardware architecture designed to process and validate the
data. The processing of the images is divided in two main stages. The
first one, which deals…

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Design of the J-PAS and J-PLUS filter systems

Scritto il 13 Nov 2012 alle 01:39 in Pubblicazioni

J-PAS (Javalambre-PAU Astrophysical Survey) is a Spanish-Brazilian
collaboration to conduct an innovative photometric survey of more than
8000 square degrees of northern sky using a system of 57 filters, 54
narrow-band (FWHM=13.8 nm) filters continuously populating the spectrum
between 370 to 920 nm with 10.0 nm steps, plus 3 broad-band filters.
Together with the main J-PAS survey, the collaboration is carrying out
J-PLUS (the Javalambre Photometric Local Universe Survey), an all-sky
survey using a set of 12 carefully optimized broad- and narrow-band
filters that will be used to perform the…

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Curvature wavefront sensing performance simulations for active correction of the Javalambre wide-field telescopes

Scritto il 13 Nov 2012 alle 01:39 in Pubblicazioni

In order to maintain image quality during Javalambre wide field
telescope operations, deformations and rigid body motions must be
actively controlled to minimize optical disturbances. For JST/T250 the
aberrations of the telescope will be measured with four curvature
sensors at the focal plane. To correct the measured distortions, the
secondary mirror position (with a hexapod support) and the camera
position can be modified in a control closed loop. Multiple software
tools have been developed to accomplish this goal, constituting the
"Observatorio Astrofísico de Javalambre" (OAJ)…

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