SPECTROSCOPY
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INTRODUCTION
The ALPY 200 Faint Object Spectrograph
In 2014 I modified my ALPY spectrograph for
measuring faint objects at lower resolution, replacing the standard 600 l/mm
grism with a 200l/mm grism. Since 2024 a commerical version has been
available from Shelyak Instruments
Click on the links below for
more information
2014 Original poster paper describing the ALPY 200 modification,
presented at ASPEKT 2014 in Cologne Germany and the BAA VSS meeting in York
UK
2016 ALPY 200 used to
confirm and classify supernova SN 2016bme, the first to be offically classified
spectroscopically using amateur equipment.
2018 Talk given at a BAA meeting describing the development and use of
the Star Analyser and ALPY 200 for supernova classification
2019 Talk on supernova classification using the ALPY 200 given at the Royal
Astronomical Society National Astronomy Meeting
2016
- List of transients classified spectroscopically using the ALPY in
the IAU Transient Name Server, many with the ALPY 200
version
2021 ALPY 200 used to measure spectra of Three Quasars at z >4.3,
the faintest and most distant objects measured spectroscopically using amateur
equipment
2023 ALPY 200 spectrum of supernova SN 2023vxt. At 570Mly and g mag
18.6, the faintest and most distant supernova recorded to
date
(In November 2024 Emmanuel Soubrouillard measured Supernova SN 2024zue at g
mag 19 and 0.1 redshift using the commercial version of the ALPY
200)
Further interesting
observations using the ALPY 200
These spectra and others I have recorded can
be downloaded from the BAA spectroscopy
database
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