MODS Slit Masks

The table below lists the slit masks loaded into the MODS1 and MODS2 slit mask cassettes. The slits may be selected by the maskID code listed (selection by cassette position number is deprecated).

Facility masks are in the reserved positions 1 thru 12. Observer-designed custom masks are loaded in positions 13 thru 24.

Cassette	MODS1		MODS2
Pos	maskID	Description	maskID	Description
1	DarkMask	Blank Mask for a Dark Block	LS5x60x0.6	0.6 arcsec Segmented Long Slit
2	SieveMask	Pinhole Imaging Sieve Nr3	SieveMask	Pinhole Imaging Sieve Nr3
3	Imaging	Empty Frame for Imaging Stop	Imaging	Empty Frame for Imaging Stop
4	LS5x60x0.3	0.3 arcsec Segmented Long Slit	LS5x60x0.3	0.3 arcsec Segmented Long Slit
5	LS5x60x0.6	0.6 arcsec Segmented Long Slit	Not	Usable
6	LS5x60x0.8	0.8 arcsec Segmented Long Slit	LS5x60x0.8	0.8 arcsec Segmented Long Slit
7	LS5x60x1.0	1.0 arcsec Segmented Long Slit	LS5x60x1.0	1.0 arcsec Segmented Long Slit
8	LS5x60x1.2	1.2 arcsec Segmented Long Slit	LS5x60x1.2	1.2 arcsec Segmented Long Slit
9	LS60x5	5 arcsec Spectrophotometry Wide Slit	LS60x5	5 arcsec Spectrophotometry Wide Slit
10	PinholeSlit	Pinhole Slit	PinholeSlit	Pinhole Slit
11	Pointing Mask	MODS Pointing Mask	Pointing Mask	MODS Pointing Mask
12	Not	Usable	No Mask	2.4 arcsec Segmented Long Slit
13	2.4 arcsec Segmented Long Slit			No Mask
14		No Mask		No Mask
15		No Mask		No Mask
16		No Mask		No Mask
17		No Mask		No Mask
18	ID 503205	mods.39.UDS1.mms	ID 503205	mods.39.UDS1.mms
19	ID 593032	mods.1.UDS2.mms	ID 593032	mods.1.UDS2.mms
20	ID 582025	mods.12.j0309.mms	ID 582025	mods.12.j0309.mms
21	ID 583616	mods.13.j0309.mms	ID 583616	mods.13.j0309.mms
22	ID 585229	mods.14.j0309.mms	ID 585229	mods.14.j0309.mms
23	ID 560300	mods.9.j0309.mms	ID 560300	mods.9.j0309.mms
24		No Mask		No Mask

Mask exchange done by Joe and Elliott 1-14-2023. Udated list by Elliott