# FILTER TURRET SETTING ALIAS LIST        
2026-4-27            
ALIAS NAME FILTER1 FILTER2 FILTER3      
# Imaging            
# BB Filters etc            
DEF_DARK NOP NOP BP      
DEF_IMY Y CSLM HOLE      
DEF_IMJ J CSLM HOLE      
DEF_IMH H CSLM HOLE      
DEF_IMKS KS CSLM HOLE      
# MB filters            
DEF_IMMBJ2 J J2H2K2 HOLE      
DEF_IMMBH2 H J2H2K2 HOLE      
DEF_IMMBK2 KS J2H2K2 HOLE      
DEF_IMMBK3 MBK3 CSLM HOLE      
DEF_IMMBK4 HOLE CSLM MBK4      
# NB filters            
DEF_IMNB119 NB119 CSLM HOLE      
DEF_IMFE2 FE2 CSLM HOLE      
DEF_IMNB1550 NB1550 CSLM HOLE      
DEF_IMNB1657 HOLE NB1657 HOLE      
DEF_IMH2 H2 CSLM HOLE      
DEF_IMBRG BRG CSLM HOLE      
DEF_IMBRG_ON KS CSLM BRG_ON      
DEF_IMBRG_OFF HOLE CSLM BRG_OFF      
DEF_IMNB2071 HOLE NB2071 HOLE      
DEF_IMNB2083 HOLE NB2083 HOLE      
DEF_IMNB2095 HOLE NB2095 HOLE      
DEF_IMCO CO CSLM HOLE      
DEF_IMNB2315 HOLE NB2315 HOLE      
# Pupil Viewer (Engineering Purpose)        
DEF_PV HOLE CSL PV      
* Note: ND filter and K-cont filter were retired in 2020. ND filter is still available on request. Contact the SA at least ~1 yr before use.
             
# Spectroscopy       Coverage(um)*1    
DEF_HK500 HOLE OC_HK HK500 1.3 - 2.3    
DEF_HK500LONG HOLE OC1_3 HK500 1.3 - 2.5: w more thermal BG.    
DEF_HK500KS KS CSLM HK500 2.0 - 2.3: less thermal BK than HK500K    
DEF_ZJ500 HOLE OC_ZJ ZJ500 0.9 - 1.78    
DEF_ZJ500HOLE HOLE CSLM ZJ500 0.9 - (but 2nd order contaminates beyond 1.8um)    
DEF_VPH_Y HOLE CSLM VPH_Y 0.9 - 1.15: longer side determined by detector edge.    
DEF_LS_J HOLE OC_ZJ LS_J 1.09 - 1.39  (determined by detector edges)    
DEF_LS_H HOLE OC_HK LS_H 1.43 -1.82  (determined by detector edges)    
DEF_VB_K HOLE OC_HK VB_K 1.8 - 2.3: shorter side defined by detector edge. Less thermal BG.    
DEF_VB_KLONG HOLE OC1_3 VB_K 1.8 - 2.5: shorter side defined by detector edge.    
DEF_VB_KS KS CSLM VB_K 2.0 - 2.3    
* Note 1: the values are defined by filters. The actual spectra may be cut off by detector edges.    
* Note 2: R1300 was retired in 2020 due to microcrack issue.    
* Note 3: VPH_J & VPH_H Grisms were replaced to LS_J and LS_H, respectively, in 2020.     
* Note 4: You may also use NB/MB filters with grisms. Ask SA if necessary.    
             
###  Special Setting for Ch1-Ch2 Independent Filter/Grisms: upper=ch1 lower=ch2 ###    
# Ch1 = Imaging for Monitor, Ch2 = Spectroscopy      
DEF_HK500WIN1 H2 CSLM HOLE      
HOLE OC_HK HK500      
DEF_HK500LONGWIN1 H2 CSLM HOLE      
HOLE OC1_3 HK500      
DEF_ZJ500WIN1 NB119 CSLM HOLE      
HOLE OC_ZJ ZJ500      
DEF_ZJ500HOLEWIN1 NB119 CSLM HOLE      
HOLE CSLM ZJ500      
DEF_VPH_YWIN1 Y CSLM HOLE      
HOLE CSLM VPH_Y      
DEF_LS_J_WIN1 NB119 OC_ZJ HOLE      
HOLE OC_ZJ LS_J      
DEF_LS_H_WIN1 FE2 CSLM HOLE      
HOLE OC_HK LS_H      
DEF_VB_KWIN1 H2 CSLM HOLE      
HOLE OC_HK VB_K      
DEF_VB_KLONGNWIN1 H2 CSLM HOLE      
HOLE OC1_3 VB_K      
* NOTE: When you take dome flats, add "B" at the end of the definition part. It will put blank plate (cover) to the imaging channel to protect detector.
             
             
# Ch2 = Imaging for Monitor, Ch1 = Spectroscopy      
DEF_HK500WIN2 HOLE OC_HK HK500      
H2 CSLM HOLE      
DEF_HK500LONGWIN2 HOLE OC1_3 HK500      
H2 CSLM HOLE      
DEF_ZJ500WIN2 HOLE OC_ZJ ZJ500      
NB119 CSLM HOLE      
DEF_ZJ500HOLEWIN2 HOLE CSLM ZJ500      
NB119 CSLM HOLE      
DEF_VPH_YWIN2 HOLE CSLM VPH_Y      
Y CSLM HOLE      
DEF_LS_J_WIN2 HOLE OC_ZJ LS_J      
NB119 OC_ZJ HOLE      
DEF_LS_H_WIN2 HOLE OC_HK LS_H      
FE2 CSLM HOLE      
DEF_VB_KWIN2 HOLE OC_HL VB_K      
H2 CSLM HOLE      
DEF_VB_KLONGNWIN2 HOLE OC1_3 VB_K      
H2 CSLM HOLE      
* NOTE: When you take dome flats, add "B" at the end of the definition part. It will put blank plate (cover) to the imaging channel to protect detector.
             
             
             
Update History:            
2016-10-10: Default order-sorting filter for VPHJ is changed from OC_ZJ to HOLE+CSL. This mode has been effective since the October observations.
2016-11-15: The alias for VPH filters has changed to keep their consistency with grism name. e.g., DEF_VPHJ --> DEF_VPH_J etc.  
2016-11-15: TheNB filters used with the VPH_H grism with the window imaging has changed from Fe2 to NB119, as the sky for Fe2 is too bright.
             
2020-06-30: VPH-Y and R1300 Grisms were retired in 2020. Instead, LS_J and LS_H Grisms were installed in 2020. All the related aliases were updated.
2020-09-17: The filter for LS_J has changed from CSLM to OC_ZJ to suppress the ghost.    
             
2023-2-5: VPH-Y is back, VPH-J/H are removed. A confusion on VPH_HK and VPH_K are cleared now.    
2023-02-05: The retirement of K-cont and ND were reflected to the table.    
             
2024-03-05: removed remaining VPHJ/H part. Editted VPH_K part following the change of the definition. Added VB_K-related definition. Removed th BP-adding definition and put the note for it.
             
2025-08-08: IMMBJ2, IMMBH2, IMMBK2, BRG_ON, BRG_OFF are added. The defs related to VPHK are all removed due to retire.   
2026-04-21: The BRG_OFF is now without Ks for T1T4.      
2026-04-27: Some mistakes! OC1_3, NB1550, and MBK3, and J2H2K2 information is corrected.