KEYWORDS: Prototyping, Data analysis, Statistical analysis, Cameras, Data processing, Databases, Astronomy, Current controlled current source, Imaging systems, Telescopes
We develop a prototype of data analysis system for the wide-field camera Hyper Suprime-Cam (HSC) at Subaru Telescope. The current prototype is optimized for data of the current Subaru prime-focus camera Suprime-Cam, which is a precursor instrument of HSC, to study the on-site data evaluation for wide-field imaging.
The system conducts realtime data evaluation for every data frame obtaining statistical information including seeing, sky-background level, astrometric solution, and photometric zeropoint when available.
Variations in time of the derived values are shown on a web-based status monitor. The on-demand analysis such as mosaicing analysis is performed using the data evaluation results.
This system consists of analysis pipelines responsible for data processing, and the analysis organizing software for controlling analysis tasks and data flow and the database.
The XML-based database maintains all the analysis results and analysis histories. Improvement of the analysis speed by parallel data processing is achieved with the aid of the organizing software.
This system has started operation in general observations since March 2010, and will be extended to process the 104 CCD's of HSC.
The system may be used for observing support and also possible to apply to another imaging-mode instruments in the future.
We report an analysis framework developed for the Hyper Suprime-Cam. The framework is featured by distributed
parallel execution and a Python interface. With the Python interface, it collaborates with the LSST
application framework. Thus we have developed a test pipeline with both the frameworks, and tested its parallelization
performance.
KEYWORDS: Data analysis, Prototyping, Statistical analysis, Databases, Data processing, Imaging systems, Calibration, Cameras, Data archive systems, Analytical research
We report our activity on development of data analysis system dedicated for the Hyper Suprime-Cam (HSC),
which is a future wide-field camera at Subaru Telescope. The data analysis system (HSC-ANA) is intended for
the following achievements: (1) automated processing of an unprecedentedly huge amount of data frames without
frequent human interactions to achieve required depth and area of the key survey projects (2) immediate release
of best-effort object catalogs together with calibration information to user communities to maximize scientific
outputs. The system also enables general users to efficiently use archive data by providing appropriate meta data
describing data quality. We start with constructing a prototype data analysis system which involves minimal
functions to process data for the current prime-focus camera (Suprime-Cam). The prototype system is developed
based on combination of newly developed and existing software packages for imaging data and the framework
middleware which communicates with databases. This system is planned to help observers to perform their
observations with Suprime-Cam. Once the prototype system is evaluated, it will be scaled up to the full HSCANA
system.
In this paper, we report a wavelength- and time-division reconfigurable optical add/drop multiplexer using a time-space
conversion and a MEMS optical switch. We verify the drop function and the reconfigurability of the proposed ROADM.
The experimental results show the operability of the 20 channels (5 wavelength channels × 4 time slots) ROADM.
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