IAC80 Filters

The list of filters is currently under revision

Available filters for CAMELOT

Interferential filters:

IAC No.

Spectral Range

CWL[nm] 
Width[nm]

Tmax(%)(1)

Transmission

Cosmetic(2)

Size(3)

Name(4)

IAC No.
jpg ascii
73 — 312.7 4 65.2
V – H
 
V – H
 new 50L n73 73
77 — 330.9 4.3 52.4
V – H
V – H
 new 50L n77 77
22 [OII] cont. 365.8 5 57.2 V – H
V – H
 (*) 50D n22[OII]ct 22
4 [OII] 372.5 5 54.2
V – H
V – H
 new 50D n4[OII] 4
76 [NeIII],OII, Heps 397.3 6.9 61.1
V – H
V – H
 new 50Lx8 n76[NeIII] 76
14 — 460.9 5 78.2
V – H
V – H
 new 60D n14 14
15 HeII 463.3 5 78.3
V – H
V – H
 det(O) 60D n15HeII 15
80 HeII 468.3 3 76
V – H
V – H
 broken 60Dx6 n80HeII 80
66 [ArIV], [FeIII] 475.3 3 60.5 C C broken 50D n66[ArIV] 66
5 Hß cont. 484.1 3 78.3
V – H
V – H
 new 60D n5Hbct 5
10 Hß 486.5 3 79.3
V – H
V – H
 det in borders 60D n10Hb 10
65 Hß 487.5 6.2 63.7 C C broken 50Dx6 n65Hb 65
13 Hß red 490.1 5 66
V – H
V – H
 det in borders 60D n13Hbred 13
1 Hß red. 493.5 4 80.7
V – H
V – H
 new 60D n1Hbred 1
6 [OIII] 500.8 3 76.7
V – H
V – H
 new 50Dx6 n6[OIII] 6
7 [OIII] red. 502.8 5 80.2
V – H
V – H
 det(O) 60D n7[OIII]red 7
3 [OIII] cont. 505.8 5 78.3
V – H
V – H
det(O) 60D n3[OIII]ct 3
33 [OIII] cont. 506.5 2.5 76.3
V – H
V – H
 broken 60Dx6 n33[OIII]ct 33
9 [OIII] red. 510 5 80.6
V – H
V – H
 broken 60D n9[OIII]red 9
16 [OIII] red. 514 5 79.2
V – H
V – H
 broken 60D n16[OIII]red 16
8 [OIII] red. 518 5 66.5
V – H
V – H
 new 60D n6[OIII]red 8
21 [OIII] red. 522 5 84
V – H
V – H
 det(O) 60D n21[OIII]red 21
11 [OIII] red. 525 0.5 —     det(O) 60D n11[OIII]red 11
18 — 545.7 5 71.5
V – H
V – H
 new 60D n18 18
28 — 606.1 19.7 92.1
V – H
V – H
 broken 60Dx7 n28 28
38 [OI] cont. 625.8 2.9 89.5
V – H
V – H
 new 60Dx7 n38[OI]ct 38
37 [OI] 630.8 2.9 87.8
V – H
V – H
 new 60Dx7 n37[OI] 37
27 Ha cont. 650.7 5 84.7
V – H
V – H
 new 60Dx7 n27Hact 27
40 Ha 656.7 0.8 60
V – H
V – H
 broken 50Dx6 n40Ha 40
20 Ha+[NII] 657.1 5 91.1
V – H
V – H
     n20Ha[NII] 20
68 Ha 657.6 9.6 63 C C new 50Dx6 n68Ha 68
12 Ha red. 661.1 5 88.7
V – H
V – H
 (*) 60D n12Hared 12
24 Ha red. 664.7 5 90.2
V – H
V – H
 new 60Dx7 n24Hared 24
19 Ha red. 668.7 5 92.9
V – H
V – H
 (*) 60D n19Hared 19
32 [SII] 671.7 0.8 65.9
V – H
V – H
 scrat 60Dx5 n32[SII] 32
17 [SII] 672.3 5 92.5
V – H
V – H
 new 60D n17[SII] 17
34 [SII] 673.5 1.1 59.7
V – H
V – H
 new 60D n34[SII] 34
39 Ha red. 676.3 4.9 92.7
V – H
V – H
 new 60Dx7 n39Hared 39
31 Ha red. 680.3 5 93.2
V – H
V – H
 new 60Dx5 n31Hared 31
30 Ha red. 684.8 5 87.5
V – H
V – H
 new 60Dx7 n30Hared 30
36 Ha red. 689.1 5 91.5
V – H
V – H
 new 60Dx7 n36Hared 36
35 Ha red. 692.9 4 92
V – H
V – H
 broken 60Dx7 n35Hared 35
2 Ha red. 697.2 5 92.3
V – H
V – H
new 60D n2Hared 2
29 — 701.5 5 92.1
V – H
V – H
 new 60Dx7 n29 29
74 — 744.2 13.9 90.2
V – H
V – H
 broken 50L n74 74
85 750 Cont 749.25 11.5 87.5

  new 50D n85con 85
78 K 769.1 24.3 95.5
V – H
V – H
 new 50L n78K 78
83 K (LGS-OGS) 769.1 10 ?     det in borders 50Lx6 n83K 83
75 — 779.8 24.9 91.3
V – H
V – H
 new 50L n75 75
81 824 Ch4blue 823.6 13.2 81.2
V – H
V – H
broken 50Lx6 n81_824 81
84 890 Ch4cen 890.25 12.5 86     new 50D n84_890 84
82 914 Ch4red 913.8 13.5 90.4
V – H
V – H
broken 50Lx6 n82_914 82
25 [SIII] cont. 948.1 3 84.3
V – H
V – H
 broken 60Dx6 n25[SIII] 25
23 [SIII] 952.9 3 81.8
V – H
V – H
 det in borders 60Dx6 n23[SIII]

23
 

 

 

Circular filter

 
 
(1) All these are circular filters 60mm diameter or 50mm side (square) or diameter (round). The transmission of each filter was measured by sampling in two different lines, horizontal and vertical, crossing the center filter to detect possible irregularities. Data were taken every 5 mm. Sampling took place in the whole visible range over a certain length at the ends to evaluate their performance. The sampling interval was 0.1 nm and a bandwidth of 0.3 nm (except for IAC # 26, which was 0.5 nm, and IAC IAC # 32 and # 34, with a sampling of 0 , 02 nm with a bandwidth of 0.07 nm). The transmission measured is ratiometric, that is, no corrections were applied onphotopic or scotopic correction curves. The measurement temperature for all filters was 20 º C.
 
(2) (det) label indicates that filter is somewhat damaged and is going to be replaced soon, (O) label indicates that a new filter have been requested, (scrat) label indicates that the filter is somewhat scratched.
 
(3) 50L: squared filters 50mm side.
50D: circular filter of 50mm diameter (proper for FASTCAM).
60D: circular filters 60mm diameter.
Filter thickness is indicated only if it is larger than 5mm.
 
(4) Filter name in the image header.
(*) Please, contact with GAS (ttnn_a@iac.es) if you want to use these filters.

  • Johnson/Bessell (size: 50L)

Name
CWL [nm]
Width [nm]
Tmax (%)
Transmission (ASCII)
U 365.75 57.70 64.77 U
B 433.45 97.50 71.17 B
V 537.40 84.60 86.75 V
R 627.25 127.30 82.04 R
I 872.20 298.00 93.70 I

  • SDSS

Name
CWL [nm]
Width [nm]
Tmax (%)
Transmission (ASCII)
u’ 305.05 62.30 79.28 u’
g’ 475.80 143.40 90.21 g’
r’ <623.10 142.60 94.96 <r’
i’ 770.60 156.40 92.68 i’
z’ 966.20 267.60 96.62 z’

 

  • STROEMGREN

Filter
CWL [nm]
Width [nm]
Tmax (%)
Transmission (JPG)
U
346,75
 31,5 83,68 U
V 412,00 20 91,52 V
B 465,5 17,0 89,52 B
Y 544,75 23,5 91,90 Y

 

 

Filters for TCP

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Name
CWL [nm]
Width [nm]
Tmax (%)
    
U
 364.25 57.50 66.87 U U
B 431.75 98.50 68.00 B B
V 532.25 85.50 90.29 V V
R 631.00 < 122.00 78.45 R R
I 881.50 312.00 83.61 I I
 
 

The observers must contact their support astronomer some months before their run to indicate any spetial filter requirements. The filter wheel is inside the cryostat, so once the cryostat is closed it will not be opened again until the camera is carried down to the IAC’s workshops at La Laguna.