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…
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)…
J-PAS survey consists of an 8000 square degree photometric sky survey
with a set of 54 narrow-band, 2 mediumband and 1 broad-band filters. The
main goal is to produce a photo-redshift catalog of 15 millions red,
earlytype galaxies with a precision (z) 0:003(1 + z) to measure the
Baryonic Acoustic Oscillation (BAO). Such precision requires specific
care in the photometric calibration survey. This contribution presents
the calibration protocol developed at CEFCA for the J-PAS data and to be
applied from its first day. An auxiliary telescope JAST/T80 will perform
an initial survey, J-PLUS,…
Observational strategy is a critical path in any large survey. The
planning of a night requires the knowledge of the fields observed, the
quality of the data already secured, and the ones still to be observed
to optimize scientific returns. Finally, field maximum altitude, sky
distance/brightness during the night and meteorological data (cloud
coverage and seeing) have to be taken into account in order to increase
the chance to have a successful observation. To support the execution of
the J-PAS project at the Observatorio Astrofísico de Javalambre
(OAJ), we have prepared a scheduler and a…
There are many ways to solve the challenging problem of making a high
performance robotic observatory from scratch. The Observatorio
Astrofísico de Javalambre (OAJ) is a new astronomical facility
located in the Sierra de Javalambre (Teruel, Spain) whose primary role
will be to conduct all-sky astronomical surveys. The OAJ control system
has been designed from a global point of view including astronomical
subsystems as well as infrastructures and other facilities. Three main
factors have been considered in the design of a global control system
for the robotic OAJ: quality, reliability and…
