LMI: Status (Updated July 2, 2013)
LMI is now on the telescope and being used for science while commissioning concludes.
We are running with the "science-grade" chip", and learning a great deal. A small version of the "first light" image of NGC 891 can be found above; click on it for a higher res version.
A complete set of our pretty pictures can be found by following the Gallery link below!
In late June 2012, e2v sent us the two CCDs
we've been patiently waiting for, a grade 5 "setup" device and
the grade 1 science chip. The specs for the grade 1 science device
can be found here. According to the spec sheets, the grade 5 device is nearly as good as the grade 1, with similar DQEs and other characteristics. (The peak DQE of the grade 1 device is 97%, thanks to the special AR-coating.) The grade 5 device was put into the dewar in July for testing and tweaking, and the camera was taken out and put on the instrument cube Sept 4. Bad weather prevented much by way of on-sky tests until September 12. Se replaced the chip with the science-grade chip in February 2013. Details of operation can be found by following the link below to the users' manual.
Things that remain to be done:
- All deep-depletion devices suffer from a residual image problem. We have several possible solutions in mind to remedy these. So far they have no compromised the science operation.
- A new baffle will be installed during the summer of 2013 to improve the scattered light with the instrument.
- The flat-field lamp system still needs to be completed.
These results made use of the Discovery Channel Telescope at Lowell Observatory. Lowell is a private, non-profit institution dedicated to astrophysical research and public appreciation of astronomy and operates the DCT in partnership with Boston University, the University of Maryland and the University of Toledo. Partial support of the DCT was provided by Discovery Communications. LMI was funded by the National Science Foundation via grant AST-1005313.