COMICS spectrograph

The COMICS spectrograph consists of 5 arrays, each 320 pixels in the dispersion direction, separated by the equivalent of 250 pixels. The entire spectrum fits on a single array in low-resolution mode, while two exposures are required to produce a complete spectrum in medium or high-resolution mode. The following table summarizes the performance of each grating; more detailed information can be found on the individual grating pages.

Grating Resolution Dispersion
(um/pixel)
Coverage
(um)
Sensitivity
(mJy)*
0.33'' slit 0.50'' slit 0.66'' slit
NL 250 160 - 0.02 7.8-13.3 340
NM 2500 1600 - 0.002 7.8-13.3 2500
NH 11000
9300
8500
7300
6200
5600
- 0.0004
0.0006
0.0006
8.93-9.06
10.38-10.54
12.7-12.9
5500
6600
7200
QM - - 2500 0.002 16.5-25.5(1) 3000(1)
*Typical 1 sigma sensitivities for 1 second of on-source integration, assuming chopping only.

(1) For the old QM-short mode - see QM page for details.

Important: Overheads for COMICS can be large; you must read the information on Overheads and observing technique before planning your observations.



Copyright © 2000-2003 Subaru Telescope, NAOJ. All rights reserved.