Observers are required to establish and document proper observation procedures by contacting with the Support Astronomer (SA) beforehand. Please plan with your SA regarding your research details by ...

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.

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

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 ...

It is not necessary to calculate the coordinates for offset position if the offset is already given. Spec: It is not necessary to calculate the coordinates for offset position since the conversion ...

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 following image (upper) shows the typical bias images (1X1 binning) of chip1 (right) and chip2 (left). These images are shown as is (i.e., no image flips/rotation, or, vertical direction for Y and ...

If there are any FALCON software running, exit them completely out first, and then restart everything. Start fresh every evening! There are two ways of starting up the FALCON. The only difference is ...

A Servo Error shows up in the YASNAC (central equipment) front panel near the floor. Alarm sign is blinking in the YASNAC front panel. Status lamp on the YASNAC turns ...

FALCON software is made of six pieces of software running either on focas2 (onboard WS), focas5 (onboard WS for Messia V), focas (main OBCP in the 2nd floor of the control building), and focana (at ...

2.0 VPH680+Y47 2X2 120 2.2 1.0 VPH450+NONE 2X2 120 25.0 1.0 VPH520+NONE 2X2 120 7.5 1.0 VPH650+Y47 2X2 120 2.5 1.0 VPH850+o58 2X1 120 2.5 0.8 VPH900+o58 2X1 120 3.0 ...

Select the most suitable slit as required for seeing, spectral resolution, and wavelength coverage. The maximum number of slits that can be installed at once is 9 ...