SPHERE Filters
IRDIS filters
Broad-band filters
Filter Name | Central Wavelength (nm) | Width (nm) | Transmission |
B_Y | 1043 | 140 | Plot - Numerical values |
B_J | 1245 | 240 | Plot - Numerical values |
B_H | 1625 | 290 | Plot - Numerical values |
B_Ks | 2182 | 300 | Plot - Numerical values |
Dual-band filters
Filter Name | Central Wavelength (nm) | Width (nm) | Transmission |
D_Y23 |
1022 , 1076 | 49 , 50 | Plot - Numerical values |
D_J23 |
1190 , 1273 | 42 , 46 | Plot - Numerical values |
D_H23 |
1593 , 1667 | 52 , 54 | Plot - Numerical values |
D_ND-H23 |
1593 , 1667 | 52 , 54 | Plot - Numerical values |
D_H34 | 1667 , 1733 | 54 , 57 | Plot - Numerical values |
D_K12 |
2110 , 2251 | 102 , 109 | Plot - Numerical values |
Narrow-band filters
Filter Name | Central Wavelength (nm) | Width (nm) | Transmission |
N_HeI |
1085 | 14 |
Plot - Numerical values |
N_CntJ |
1213 | 17 |
Plot - Numerical values |
N_PaB |
1283 | 18 |
Plot - Numerical values |
N_CntH |
1573 | 23 |
Plot - Numerical values |
N_FeII |
1642 | 24 |
Plot - Numerical values |
N_CntK1 |
2091 | 34 |
Plot - Numerical values |
N_H2 |
2124 | 31 |
Plot - Numerical values |
N_BrG |
2170 | 31 |
Plot - Numerical values |
N_CntK2 |
2266 | 32 |
Plot - Numerical values |
N_CO |
2290 | 33 |
Plot - Numerical values |
Near-infrared neutral density filters
ZIMPOL filters
Very broad-band and broad-band filters
Filter Name | Central Wavelength (nm) | Width (nm) | Transmission |
VBB |
735.4 |
290.5 | Plot - Numerical values |
R_PRIM |
626.3 | 148.6 |
Plot - Numerical values |
I_PRIM |
789.7 | 152.7 |
Plot - Numerical values |
Medium-band filters
Filter Name | Central Wavelength (nm) | Width (nm) | Transmission |
V |
554 |
80.6 |
Plot - Numerical values |
V_S | 531.6 | 37.2 | Plot - Numerical values |
V_L | 581.5 | 41.1 | Plot - Numerical values |
N_R | 645.9 | 56.7 | Plot - Numerical values |
730_NB | 733 | 54.9 | Plot - Numerical values |
N_I | 816.8 | 80.5 | Plot - Numerical values |
I_L | 870.6 | 56.4 | Plot - Numerical values |
KI | 770.2 | 21.2 | Plot - Numerical values |
TiO_717 | 716.8 | 19.7 | Plot - Numerical values |
CH4_727 | 730.3 | 20.5 | Plot - Numerical values |
Cnt748 | 747.4 | 20.6 | Plot - Numerical values |
Cnt820 | 817.3 | 19.8 | Plot - Numerical values |
Narrow-band filters
Filter Name | Central Wavelength (nm) | Width (nm) | Transmission |
B_Ha |
655.6 |
5.5 |
Plot - Numerical values |
Cnt_Ha |
644.9 | 4.1 | Plot - Numerical values |
HeI | 588 | 5.4 | Plot - Numerical values |
OI_630 | 629.5 | 5.4 | Plot - Numerical values |
N_Ha | 656.34 | 0.97 | Plot - Numerical values |
Ha_NB | 656.49 | 0.98 | NA |