Mid-infrared drift scanning up the SNR slope

Christopher Packham; Amílcar R Torres-Quijano; Sergio Fernandez Acosta

doi:10.1117/12.2588815

9 February 2021 Mid-infrared drift scanning up the SNR slope

Christopher Packham, Amílcar R Torres-Quijano, Sergio Fernandez Acosta

Proceedings Volume 11447, Ground-based and Airborne Instrumentation for Astronomy VIII; 114477P (2021) https://doi.org/10.1117/12.2588815
Event: SPIE Astronomical Telescopes + Instrumentation, 2020, Online Only

Conference Poster

Abstract

Mid-infrared (MIR) observations are typically accomplished from the ground through oscillating the secondary mirror a few times a second. This chopping serves to remove the fast time variable components of (a) sky variation and (b) array background. However, there is a significant price to pay for this, including reduced on-object photon collection time, stringent demands on the secondary mirror, nodding the telescope to remove the radiative offset imprinted by the chopping, and an often-fixed chop-frequency regardless of the sky conditions in the actual observations. Worse, in the era of 30m telescopes it is wholly impracticable to chop the secondary mirror. If the array is stable enough, drift scanning holds the promise to remove the necessity of chopping. In this paper we report our experiments using the CanariCam MIR instrument on the 10.4m GranTeCan and the implications to future instruments and experiments.

Citation Download Citation

Christopher Packham, Amílcar R Torres-Quijano, and Sergio Fernandez Acosta "Mid-infrared drift scanning up the SNR slope", Proc. SPIE 11447, Ground-based and Airborne Instrumentation for Astronomy VIII, 114477P (9 February 2021); https://doi.org/10.1117/12.2588815

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