IR Filters

 

Band/
Wavelength		 Filter ID
(Text Data)		 Filter ID
(Graph)		 Available
for ISPI *		 Comment
Y 191A 191A   30mm Barr
Y 191B 191B   50mm Barr
Y 191C 191C   65mm Barr
Y 191D 191D   30mm Barr
I 81 81   25mm inew
J 40 40   25 mm Jcit
J 82a 82a   25mm Jshort
J 183 183   30mm Barr
J 186 186 removed,
2004b		 60mm OCLI,
Gemini, ISPI
J 192 192, scan Yes 65mm Barr
H 44 44   25mm OCLI
H 184 184   30mm Barr
H 187 187 removed,
2004b		 60mm OCLI,
Gemini, ISPI
H 190 190 Yes 65mm Barr
K 50 50   25mm OCLI
K 185 185   30mm Barr
K' 188 188 removed,
2004b		 60mm OCLI,
Gemini, ISPI
Kshort 129 129   25mm Barr
/2MASS
Kshort 189 189 Yes 65mm Barr, ISPI
2.248 H2 125 125   25mm Barr
2.248 H2 199 199 Yes 65mm Omega
2.19 He II 138 138   25mm Omega
2.19 HeII 198 198 Yes 65mm Omega
2.166w Brg 132 132   25mm Barr,
wedged
2.16 165 165   25mm Omega
2.16 Brg 197 197 Yes 65mm Omega
2.144w cont 131 131   25mm Barr,
wedged
2.14 cont 164 164   30mm Omega
2.14 cont 200 200 Yes 65mm Omega
2.122w H2 130 130   25mm Barr,
wedged
2.12 H2 89 89   25mm Barr
2.12 H2 163 163   25mm Omega
2.12 H2 196 196 Yes 65mm Omega,
bad ghosts
2.08 C IV 136 136   25mm Omega
2.08 C IV 195 195 Yes 65mm Omega
2.06 He I 135 135   25mm Omega
2.06 He I 194 194 Yes 65mm Omega
2.03 cont 134 134   25mm Omega
2.03 cont 193 193 Yes 65mm Omega
1.644 [Fe II] 128 128   25mm Barr
1.28 Palpha 110 110   25mm Barr
1.257 [FeII] 111 111   25mm Barr

 

Notes on IR Filters:

* Check the ISPI pages to see if the filter is currently in the ISPI Dewar.

The filters listed above have seen recent use in Tololo imagers. There are other filters available. Observers should check with the staff noted below if there is a filter or transmission curve not listed above which would be of interest.

In response to an increasing number of requests, we are starting to place digital versions of the transmission data for some of our filters here. The user should take some care to verify that the filter is valid for the instrument he or she is considering at the time of use in question. The actual filter in use will in general not be the exact filter for which we have transmission data, but rather be one of the same batch. The numbers refer to the CTIO filter ID by which the filter data is archived. In case of doubt, consult with Nicole van der Bliek, Patrice Bouchet, Bob Blum, Brooke Gregory.

10 March, 2006 [rdb]