Persistence and count-rate nonlinearity in the HST WFC3 IR detector

Susana Deustua; Knox S. Long; Peter McCullough; Adam G. Riess; John MacKenty; Randy Kimble; Sylvia M. Baggett; Bryan Hilbert; Robert J. Hill; Cheryl Pavlovsky; Larry D. Petro

doi:10.1117/12.857582

10 August 2010 Persistence and count-rate nonlinearity in the HST WFC3 IR detector

Susana Deustua, Knox S. Long, Peter McCullough, Adam G. Riess, John MacKenty, Randy Kimble, Sylvia M. Baggett, Bryan Hilbert, Robert J. Hill, Cheryl Pavlovsky, Larry D. Petro

Author Affiliations +

Proceedings Volume 7731, Space Telescopes and Instrumentation 2010: Optical, Infrared, and Millimeter Wave; 77313C (2010) https://doi.org/10.1117/12.857582
Event: SPIE Astronomical Telescopes + Instrumentation, 2010, San Diego, California, United States

Abstract

We now know that the flux of a source measured with HgCdTe arrays is not a simple, linear function, but depends on the count-rate as well as the total number of counts. In addition to the count-rate non-linearity (and probably related to the same physical mechanism), HgCdTe detectors are also susceptible to image persistence. Most of the persistence image fades in a few minutes, but there is a longer-term component that can result in faint afterimages in the next orbit, approximately 45 minutes later. For sources saturated at ~100 times full-well, the afterimages can persist for hours afterwards. This report describes results from ground and on-orbit tests to characterize the persistence and the count-rate non-linearity in the WFC3 IR detector during its first year of operation.

Citation Download Citation

Susana Deustua, Knox S. Long, Peter McCullough, Adam G. Riess, John MacKenty, Randy Kimble, Sylvia M. Baggett, Bryan Hilbert, Robert J. Hill, Cheryl Pavlovsky, and Larry D. Petro "Persistence and count-rate nonlinearity in the HST WFC3 IR detector", Proc. SPIE 7731, Space Telescopes and Instrumentation 2010: Optical, Infrared, and Millimeter Wave, 77313C (10 August 2010); https://doi.org/10.1117/12.857582

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