Omega Prime - Technical Characteristics
and Astronomical Performance

Array Type Rockwell 1024 x 1024 pixel HAWAII array:
HgCdTe detector + Si MOSFET non-destructive readout
Pixel scale 0.3961±0.0004 arcsec/pixel
Field of View 405.6 arcsec square (6.76 arcmin square)
Wavelenth range 1.0 µm - 2.5 µm
Telescope Calar Alto 3.5m (prime focus)


Sensitivity:
For point sources to the 5 sigma level (i.e. the brightest pixel in the centre of the star is at 5 times the background noise), with two minutes integration time (not including any overheads for detector read out etc.), and with a seeing of 1 arcsec FWHM.

K' = 17.5 mag H = 18.1 mag J = 19.2 mag


Filter options:
All filter data determined at 77 Kelvin! A tracing of the filter transmission curve will eventually be available by clicking on the filter name (not implemented yet!).

Click here to return to the Omega-Prime Manual

Filter Central
Wavelength
(µm)		 FWHM
(µm) 		Tpeak
(%) 		cut on
(µm) 		cut off
(µm) 		Thickness
(mm) 		Status
J - - 75 1.130 1.420 - in
H - - 73 1.493 1.798 - in
K - - 75 2.008 2.427 - in
Ks - - 85 2.002 2.390 - in
Km - - 90 1.944 2.292 - in
NB1.644
FeII
 - - - - - - N/A
NB2.122
H2 1-0
2.125 0.0206
(0.97%)
 82 - - - in
NB2.144
K Cont.
 2.143 0.0227
(1.06%)
 80 - - - in
NB2.166
Br gamma
 2.170 0.0219
(1.01%)
 73 - - 1.9 in
NB2.248
H2 2-1
- - - - - - N/A
NB2.295
CO
 2.291 0.0215
(0.94%)
 65 - - 1.9 in
BDS
short end K		 - - 91 1.951 2.208 1 in
BDL
long end K
 - - 94 2.150 2.413 1 in


A Schematic diagram [17 kB] of Omega-prime is also available.

Peter Bizenberger
biz@mpia-hd.mpg.de
Phone: +49 (6221) 528-311