This is an old revision of the document!
The Kitt Peak Ohio State Multi-Object Spectrograph (KOSMOS) was loaned to ARC by NOAO for use on the 3.5m telescope. Because the KOSMOS instrument was modified from its original state in order to be installed on the ARC 3.5m telescope at APO, we now refer to this instrument as KOSMOS II.
A quick-look fact sheet from September, 2019, about KOSMOS II is available attached below.
The google doc containing the latest edits is located at https://docs.google.com/document/d/1aVzRTs3c2Qw2ouDpa6S4oDPSPi5ijx5LKGN9aSaHe-4/edit?usp=sharing
- kosmos_quick_look_rev1_.pdf (2022/03/11 00:01 91.3 KB)
At the Users Committee meeting on 8/2/2022, someone asked whether any KOSMOS users have posted or shared recommendations for KOSMOS flat fielding given the bright rows in the flats attributed to the zeroth order. The issue is described here: https://www.apo.nmsu.edu/arc35m/Instruments/KOSMOS/userguide.html#4p3 ; the question was how are people are handling this in the data reduction? Jon Holtzman replies that “I got some reasonable results just by fitting and subtracting a Gaussian with a linear background at the Littrow ghost location from flats (specifically, using a running median across columns).” If people continue to have issues with this, please contact your Users Committee rep so this can be discussed at a future meeting.
