HDI Technical Notes
These began with
commissioning tests: Oct-Nov 2013
- Tech Note 0.0: Out of Focus images from first night of HDI
(Mar 02, 2013)
- Tech Note 0.1: Properties of HDI images from Feb 28, 2013
(Mar 02, 2013)
- Tech Note 0.2: Stromgren filters for the WIYN 0.9-m Telescope
(Jun 3, 2013)
- Tech Note 1:
Gain measurements from flatfield images
(Oct 19, 2013)
- Tech Note 2:
Readnoise, dark current, crosstalk
(Nov 5, 2013)
- Tech Note 3:
Analysis of images of a rich star field
(Nov 18, 2013)
- Tech Note 4:
Readout noise after repairs to the dewar
(Nov 23, 2013)
- Tech Note 5:
Dome vs. Sky Flats at the WIYN 0.9-m
(Jan 24, 2014)
- Tech Note 6:
Properties of the overscan, and dark current
(Jan 26, 2014)
- Tech Note 7:
HDI data reduction tutorial
(Jul 08, 2014)
- Tech Note 8:
Tests of linearity and gain
(Jan 09, 2015)
- Tech Note 9:
Behavior of HDI after strong saturation
(Feb 24, 2015)
-
WIYN 0.9-m Annual Report, June 2015
(May 28, 2015)
- Tech Note 10:
The ion pump and noise measurements of HDI in Nov-Dec, 2015
(Dec 12, 2015)
- Tech Note 11:
Focus tests in Jan, 2016
(Jan 29, 2016)
- Tech Note 12:
Focus/collimation tests in Feb, 2016
(Feb 12, 2016)
- Tech Note 13:
Shutter tests in Feb, 2016
(Feb 18, 2016)
- Tech Note 14:
Noise in HDI images caused by bad grounding
(Mar 15, 2016)
- Tech Note 15:
Modifications to HDI's grounding strap
(Apr 8, 2016)
-
WIYN 0.9-m Annual Report, June 2016
(Jun 29, 2016)
- Tech Note 16:
A routine for determining a good focus position
(Jan 12, 2017)
- Tech Note 17:
Calculations of overall system throughput
(Jan 2, 2017)
-
Technical Summary of the Half-Degree Imager (PDF)
(presentation 329.01 at AAS 229 Grapevine meeting
(Jan 3, 2017)
- Tech Note 18:
Memory test on emerald
(Jan 15, 2017)
- Tech Note 19:
Tutorial: how to examine HDI images on emerald
(Jan 15, 2017)
- Tech Note 20:
Test of 1-amp readout of HDI from each amplifier
(Jan 16, 2017)
- Tech Note 21:
HDI linearity tests of amplifiers "ur" and "ul"
(Jan 24, 2017)
- Tech Note 22:
Tests of gain, with and without the "fouramp" procedure
(Feb 3, 2017)
- Tech Note 23:
Andy Lipnicky's guide to using Astro Image J
(Mar 18, 2017)
- Tech Note 24:
Comparison of dome and sky flats
(Jul 12, 2017)
- Tech Note 25:
Brief introduction to JSkyCalc, a nice planning tool
(Jan 7, 2018)
- Tech Note 26:
Examples of the "streak" and "band" noise patterns
(Feb 16, 2018)
- Tech Note 27:
Surface defects on HDI
(Apr 17, 2018)
- Tech Note 28:
Amplifier glow in the upper corners of HDI
(Sep 12, 2018)
- Tech Note 29:
Measurement of the gain
(Jan 6, 2019)
- Tech Note 30:
Notes on attaching instruments to the 0.9-m
(Jan 11, 2019)
- Tech Note 31:
Linearity test, Jan 2019
(Jan 11, 2019)
- Tech Note 32:
Placing the dome in the right position for dome flats, Jan 2019
(Jan 27, 2019)
- Tech Note 34:
Measurement of gain after HDI refurbishment, Oct 2019
(Nov 7, 2019)
- Tech Note 35:
Transferring HDI images to your computer
(Jan 9, 2020)
- Tech Note 36:
Gain and Linearity tests
(Jan 9, 2020)
The on-line manual for HDI will be updated as required: