IR Filters at CTIO

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, Brooke Gregory.


14 July, 2011 [rdb]