Please direct comments regarding the following to the GRIM II mailing list. > From: cgarasi@NMSU.Edu > Date: Thu, 22 Feb 1996 14:39:16 -0700 > To: jb@galileo.apo.nmsu.edu > > Currently, I am developing a dissertation thesis and am very interested > in creating an observational portion which will involve GRIM Spectroscopy. > Specifically, I am interested in using GRIM to observe the CO Absorption > band at 2.3 microns within cooling flow clusters. Because of the redshifted > light from these clusters, we will have to observe the spectra out to the > atmospheric water absorption at 2.45-2.5 microns. > > It has been brought to my attention by Jon Holtzman here at NMSU that > there are 2 problems which will hamper this type of analysis: > > _________________________ > 1) the read noise of the GRIM detector is very high, and will not allow > for the sensitivity needed for this type of spectroscopy > > 2) The slit disperses the IR spectrum to a red cutoff around 2.4 microns. > _________________________ > > Dr. Holtzman feels that the 1st problem can be fixed by performing > mulitple reads from the GRIM chip. This will allow us to average out the > read noise by performing a software change. > > The second problem will entail relocating the slit so that we can > observe out to the H20 atmosphere. Currently we are not sure how far the > slit would have to move, but if this was done, CO spectroscopy would > be openend up to all ARC users. > > I would appreciate your input on these matters in regards to their > feasibility and who I should contact. Currently, I am going to contact > Bob Lowenstein to see if the multiple read changes can be made in the > GRIM software. The second item is more serious in that it will involve > opening up GRIM. Plerase let me know what your thoughts are and whether > this is a possibility. > > Thanks, > > Chris Garasi > APO APO APO APO APO Apache Point Observatory 3.5m APO APO APO APO APO This is message 5 in the apo35-grim archive. You can find APO the archive on http://astro.princeton.edu:82/apo35-grim/INDEX.html APO To join/leave the list, send mail to apo35-request@astro.princeton.edu APO To post a message, mail it to apo35-grim@astro.princeton.edu APO APO APO APO APO APO APO APO APO APO APO APO APO APO APO APO APO