First results from the new HgCdTe MBE detectors for WFC3 – IR channel
نویسندگان
چکیده
For the IR channel of WFC3 a new type of HgCdTe detector, with 1.7μm cutoff on MBE substrate, is under development at the Rockwell International Science Center . A first batch of array has been produced in summer 1999 and tested at the GSFC Detector Characterization Laboratory (DCL) in September-November 1999. We present the first results of the testing on the prototype HI-101,and in particular we present the results obtained on the dark current at various temperatures and bias levels.
منابع مشابه
First On-orbit Measurements of the WFC3-IR Count-rate Non-Linearity
Previous HgCdTe detectors on HST have suffered from a count-rate dependent non-linearity, motivating an investigation of a similar effect on the WFC3-IR detector. An initial measurement of this effect was made by comparing the photometry of star clusters observed over a wide dynamic range and at overlapping wavelengths in WFC3-IR and NICMOS and/or ACS-WFC. Utilizing a color term to account for ...
متن کاملThe Photometric Performance of WFC 3 / IR : Temporal Stability Through Year 1
We analyze multiple observations of four bright HST spectrophotometric standard stars obtained with WFC3/IR in order to establish the temporal stability of the instrument over its first 1.5 years of science operations. Observations of one or more of the four stars, P330E, GD 153, GD 71, and G191B2B were obtained at multiple dither positions near the center of the array, and in all 15 imaging fi...
متن کاملWFC3 TV3 Testing: IR Channel Throughput
A new IR detector (IR4; FPA165) was housed in WFC3 in the recent campaign of thermal vaccum (TV) testing at GSFC. We performed measurements of the IR channel throughput and found that it exceeds by ~2-8% expectations from component measurements over the entire wavelength range of the channel. This is in contrast to the results of the first WFC3 TV test in 2004 and the second WFC3 TV test in 200...
متن کاملWfc3 Uvis and Ir Channel Alignment Properties
____________________________________________________________________________ Abstract The purpose of this ISR is to study the sensitivity of the WFC3 UVIS and IR channels to the focus and tilt of their correctors in preparation for the optical alignment of the instrument. This study is done by using the same IDL routines which will be used during the instrument optical alignment at Ball and at ...
متن کاملWFC3 SMOV Proposal 11451: The Photometric Performance and Calibration of WFC3/IR
We present the first on-orbit observations to characterize the photometric performance of the infrared (IR) camera on WFC3, based on data collected during the Servicing Mission Orbital Verification 4 Phase (SMOV4) shortly after the installation of the WFC3 instrument on HST. The photometric zero points and stability of the detector are measured in all 15 IR filters, using two different HST spec...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره شماره
صفحات -
تاریخ انتشار 2000