Characterizing nonlinearities in the Chandra LETG+HRC-S dispersion relation

Sun Mi Chung; Jeremy J. Drake; Vinay L. Kashyap; Peter W. Ratzlaff; Bradford J. Wargelin

doi:10.1117/12.552194

11 October 2004 Characterizing nonlinearities in the Chandra LETG+HRC-S dispersion relation

Sun Mi Chung, Jeremy J. Drake, Vinay L. Kashyap, Peter W. Ratzlaff, Bradford J. Wargelin

Proceedings Volume 5488, UV and Gamma-Ray Space Telescope Systems; (2004) https://doi.org/10.1117/12.552194
Event: SPIE Astronomical Telescopes + Instrumentation, 2004, Glasgow, United Kingdom

Abstract

The Chandra Low Energy Transmission Grating Spectrometer (LETGS) is comprised of 3 micro-channel plate (MCP) segments and is primarily used with the High Resolution Camera spectroscopic array (HRC-S). In-flight calibration data observed with the LETG+HRC-S show that there are non-linear deviations in the positions of some lines by as much as 0.1 Å. These deviations are thought to be caused by spatial non-linearities in the imaging characteristics of the HRC-S detector. Here, we present the methods we used to characterize the non-linearities of the dispersion relation across the central plate of the HRC-S, and empirical corrections which greatly reduce the observed non-linearities by a factor of 2 or more on the central MCP.

Citation Download Citation

Sun Mi Chung, Jeremy J. Drake, Vinay L. Kashyap, Peter W. Ratzlaff, and Bradford J. Wargelin "Characterizing nonlinearities in the Chandra LETG+HRC-S dispersion relation", Proc. SPIE 5488, UV and Gamma-Ray Space Telescope Systems, (11 October 2004); https://doi.org/10.1117/12.552194

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