Filters for SAMI

SAMI has one filter wheel with 7 positions for 3 inch square filters.  We have acquired two new broadband filter sets for exclusive use with SAMI: a Kron-Cousins BVRI set and a SDSS griz set. We also have new Ha, NI, [NII] and [SII] narrow band filters, in addition to several redshifted Ha filters designed for the Fabry-Perot module (more details in this link). The table below shows the updated list of available filters, with the vendor-supplied transmission curves.

SAM, SAMI


Filter FWHM (Å) CWL (Å) Telescope Instrument Plot Data Comments
BTFI_5021/17 Narrow 16.50 5030.90 SOAR Telescope SAM, SAMI
BTFI_6569/20 BTFI 18.60 6569.20 SOAR Telescope SAM, SAMI
BTFI_6579/20 BTFI 19.90 6578.80 SOAR Telescope SAM, SAMI
BTFI_6600/20 BTFI 19.30 6600.50 SOAR Telescope SAM, SAMI
BTFI_6745/38 BTFI 38.50 6745.00 SOAR Telescope SAM, SAMI
SAMI-[NI] Narrow 55.00 5180.00 SOAR Telescope SAM, SAMI
SAMI-[NII]6583 Narrow 18.00 6583.00 SOAR Telescope SAM, SAMI SAMI-[NII]6583 Narrow
SAMI-[SII] Narrow 75.00 6724.00 SOAR Telescope SAM, SAMI SAMI-[SII] Narrow
SAMI-[SII]6738 Narrow 27.00 6738.00 SOAR Telescope SAM, SAMI SAMI-[SII]6738 Narrow
SAMI-B K-C 1000.00 4400.00 SOAR Telescope SAM, SAMI SAMI-B K-C
SAMI-g SDSS 735.00 4750.00 SOAR Telescope SAM, SAMI SAMI-g SDSS
SAMI-Ha Narrow 75.00 6563.00 SOAR Telescope SAM, SAMI SAMI-Ha Narrow
SAMI-I K-C 1050.00 7800.00 SOAR Telescope SAM, SAMI SAMI-I K-C
SAMI-i SDSS 765.00 7750.00 SOAR Telescope SAM, SAMI SAMI-i SDSS
SAMI-R K-C 1800.00 6550.00 SOAR Telescope SAM, SAMI SAMI-R K-C
SAMI-r SDSS 735.00 6250.00 SOAR Telescope SAM, SAMI SAMI-r SDSS
SAMI-V K-C 800.00 5500.00 SOAR Telescope SAM, SAMI SAMI-V K-C
SAMI-z SDSS 2328.00 9500.00 SOAR Telescope SAM, SAMI SAMI-z SDSS

 

Because the SAM Imager (SAMI) 7 position filter wheel failed, since Dec. 2017 it has been replaced temporarily with a compatible filter wheel from the SOAR Imager (SOI). The impact for SAM users is that the SOI filter has only 5 positions, each for a 4 x 4 inch square filter. Therefore, only up to a maximum of 5 filters can be requested for use on SAMI on any given night. Observers can still request any of the 3x3 inch SAMI filters, as we have enough adapter frames for the five 4x4 inch positions in the SOI filer wheel. Users can also request any of the 4x4 inch filters available on the SOAR Filter page. A new 7-position filter wheel for the SAMI 3x3 inch filters is being designed, and will replace the current temporary SOI filter wheel.