Translator Disclaimer
7 March 2003 Multi-object spectroscopy of FOCAS: software and its performance
Author Affiliations +
Faint Object Camera and Spectrograph, FOCAS, is a Cassegrain versatile optical instrument of Subaru telescope. Among various observing modes of FOCAS, the multi-object spectroscopy (MOS) requires dedicated software suite which enables accurate positioning of masks which have over fifty slitlets on faint targets over 6 arcminutes diameter field-of-view (FOV). We have been developing three kinds of software: the image processing software performing combining mosaic CCD images and optics distortion correction, mask designing program (MDP) for the slit arrangement, and pointing offset calculator (POC) for the target acquisition on slits. MDP and POC provide observers a graphical user interface (GUI) for efficient and quick mask designing and target acquisition. Our test has shown that the slit positioning accuracy on targets is about 0.2 arcsec RMS over entire FOV, and is accurate enough for typical observations with 0.4 arcsec slits or wider. We briefly describe our software as well as the pointing accuracy and the required time for the MOS target acquisition with FOCAS.
© (2003) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Yoshihiko Saito, Youichi Ohyama, Nobunari Kashikawa, Michitoshi Yoshida, Toshiyuki Sasaki, George Kosugi, Tadafumi Takata, Yasuhiro Shimizu, Motoko Inata, Kiichi Okita, Kentaro Aoki, Kazuhiro Sekiguchi, Koji S. Kawabata, Ryo Asai, Hiroko Taguchi, Noboru Ebizuka, Yasushi Yadoumaru, Tomohiko Ozawa, and Masanori Iye "Multi-object spectroscopy of FOCAS: software and its performance", Proc. SPIE 4841, Instrument Design and Performance for Optical/Infrared Ground-based Telescopes, (7 March 2003);


WEAVE core processing system
Proceedings of SPIE (July 18 2014)
Overview of the Subaru telescope instrumentation
Proceedings of SPIE (March 07 2003)
The new FORS pipeline
Proceedings of SPIE (July 29 2010)
The plate candidates and tiling method for LAMOST pilot survey
Proceedings of SPIE (September 13 2012)
Subaru telescope: "open use"
Proceedings of SPIE (January 02 2002)

Back to Top