自然科学研究機構国立天文台ハワイ観測所が運用する 口径 8.2 メートルの光学赤外線望遠鏡です。

MDP とは、Mask Design Program の略である。このページは、MDP を用いて mask の pre-design を行う際の how-to をまとめたものである。 MDP は本来、FOCAS の pre-image 画像を用いて詳細なマスクデザインを ...

There are two MESSIA fibers connecting the OBCP computer at the computer room and the FOCAS in the dome. Computer room <- optical fiber -> IR stand-by room Computer room <- optical fiber -> Telescope ...

When you click on the COMICS observation planning JAVA applet you should see the following screen pop up on your browser (make sure you have set "JAVA enabled"). In this first tab (Target), you supply ...

The readout sequence of the COMICS detectors (320x240 pixels^2) implies that the readout noise in each of 16 channels (20x240 pixels^2) should be more or less identical. Therefore it should be ...

The total efficiency is the sum of the grism efficiency, CCD sensitivity, FOCAS optical depth, and the reflectivity of the primary and secondary mirrors.

We have selected 6 arcminutes x 6 arcminutes fields which include three and more >13 V mag. Landolt's photometric standard stars around +50 deg declination. Reference is Landolt 2013, AJ, 146, 131.

FOCAS image suffers from optical distortion as presented below. This may affect astrometry and image mosaicing (combining several images taken with dithering techniques). FOCAS team provides software ...