DEIMOS Standard Slitmasks

This document lists the standard slitmasks which are available for use by DEIMOS observers. These include masks for longslit observations and instrument focusing.

Mask Name	Description	DesID	Barcode	Status
Focusing Masks
GOH_X (GOH_foo)	grid of pinholes through mask, imaging focus mask	448	487	active
			2124	spare
			2125	spare
			2126	spare
GOSpH3	grid of spectral holes; spectroscopy focus mask	6741	6205	active
			6206	spare
			6207	spare
GOH_TV	grid of holes not quite drilled through the mask, intended for helping determine TV focus		1926	obsolete; retired
GOSpH3	grid of spectral holes; spectroscopy focus mask		1966	obsolete, retired
GOH_X	grid of pinholes through mask, imaging focus mask		1927	damaged, retired
GOH_foo	grid of pinholes through mask, imaging focus mask		486	damaged, retired
GOSpH	grid of spectral holes; spectroscopy focus mask		1930	retired
GOSpH2	grid of spectral holes; spectroscopy focus mask		1977	retired
Longslit Masks
LVMslits	Multiple slitlets (0.7, 0.8, 1.0, 1.2, 1.5 arcsec widths; all 20 arcsec long) on reflective mask. From left to right as seen on the guider are slits of width 1.5, 1.2, 1.0, 0.8, and 0.7. See notes on manufacturing this mask.	5751	4817	active
LVMslits		5751	4816	spare
LongMirr	0.7 arcsec wide × 205 arcsec long single slit on reflective mask	1684	1218	active
Long0.7	0.7 arcsec wide longslit, consisting of 12 separate slitlets, each 82 arcsec long, with a small gap or "bridge" in between in order to prevent the slit from buckling.	523	4948	active
Long0.7		523	TBD	spare
Long0.8	0.8 arcsec longslit, consisting of 12 separate slitlets, each 82 arcsec long, with a small gap or "bridge" in between in order to prevent the slit from buckling.	524	4320	active
Long0.8		524	TBD	spare
Long1.0B	1.0 arcsec longslit, consisting of 12 separate slitlets, each 82 arcsec long, with a small gap or "bridge" in between in order to prevent the slit from buckling.	525	6177	active
Long1.0B		525	TBD	spare
Long1.2	1.2 arcsec longslit, consisting of 12 separate slitlets, each 82 arcsec long, with a small gap or "bridge" in between in order to prevent the slit from buckling.	526	4311	active
Long1.2		526	TBD	spare
Long1.5	1.5 arcsec longslit, consisting of 12 separate slitlets, each 82 arcsec long, with a small gap or "bridge" in between in order to prevent the slit from buckling.	527	4319	active
Long1.5		527	TBD	spare
LongSlit	1.0 arcsec longslit		1982	retired
LongA	1.0 arcsec longslit		1891	scratched up, retired
Long1.0	1.0 arcsec longslit		488	retired?
LngVrMir	Multiple slitlets (0.7, 0.9, 1.1, 1.5 arcsec widths; all 20 arcsec long) on reflective mask From left to right as seen on the guider are slits of width 1.5, 1.1, 0.9, and 0.7.		1556	retired

Note

When the bar code number of an active slitmask changes, you must edit the Slitmask Table for via the General Query form for SIAS and update the barcode number there so that the correct one is used.

Go to: DEIMOS Home Page - Instruments Home Page - Keck Home Page

Last modified: Fri Mar 27 15:51:31 HST 2009