Infrared camera and spectrograph for the Subaru Telescope: performance improvement with the new Aladdin-III array

Hiroshi Terada; Naoto Kobayashi; Alan T. Tokunaga; Tae-Soo Pyo; Miwa Goto; Mark Weber; Robert Potter; Peter M. Onaka

doi:10.1117/12.460404

7 March 2003 Infrared camera and spectrograph for the Subaru Telescope: performance improvement with the new Aladdin-III array

Hiroshi Terada, Naoto Kobayashi, Alan T. Tokunaga, Tae-Soo Pyo, Miwa Goto, Mark Weber, Robert Potter, Peter M. Onaka

Author Affiliations +

Proceedings Volume 4841, Instrument Design and Performance for Optical/Infrared Ground-based Telescopes; (2003) https://doi.org/10.1117/12.460404
Event: Astronomical Telescopes and Instrumentation, 2002, Waikoloa, Hawai'i, United States

Abstract

We report on the significantly improved performance of the Infrared Camera and Spectrograph (IRCS) for the Subaru Telescope. The IRCS consists of the camera side for imaging and grism spectroscopy and the spectrograph side for echelle spectroscopy. Due to the low sensitivity of the previous Aladdin-II engineering grade InSb infrared array on the camera side, the capability of imaging and grism spectroscopy was reduced. Thus, we replaced the array on the camera side into the new Aladdin-III array in August 2001. The newly installed Aladdin-III array has 1.9 times higher quantum efficiency (95%), 2/3 lower read-out noise (12e^- with 16 non-destructive-readout at 27.5K of the array temperature) and better cosmetics than the old Aladdin-II array. We have also obtained grism spectra for a comparison of performances with the old and the new arrays. The spectra with the new array show about twice better signal-to-noise for each spectral element and almost no systematic noise. Currently we have two different types of arrays: Aladdin-II array on the spectrograph side and the science grade Aladdin-III array on the camera side. We will also present dark current, read-out noise, linearity curve and the other characteristics as a function of array temperatures to summarize the current performance of both arrays. We plan to upgrade the Aladdin-II array on the spectrograph side to a new Aladdin-III array in summer 2003.

Citation Download Citation

Hiroshi Terada, Naoto Kobayashi, Alan T. Tokunaga, Tae-Soo Pyo, Miwa Goto, Mark Weber, Robert Potter, and Peter M. Onaka "Infrared camera and spectrograph for the Subaru Telescope: performance improvement with the new Aladdin-III array", Proc. SPIE 4841, Instrument Design and Performance for Optical/Infrared Ground-based Telescopes, (7 March 2003); https://doi.org/10.1117/12.460404

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available