Space Telescope Imaging Spectrograph Instrument Handbook for Cycle 17

F25CN182-NUV-MAMA

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Description

The F25CN182 filter with the NUV-MAMA provides medium bandwidth imaging of the continuum near 1900 Å.

Recommended Uses

Continuum filter for C III].

Pivot (Å)	FWHM (Å)	AB mag zero point	Speak	B	R80 (arcsec)	Flux in central pixel
2004.5	677.9	21.558	2.42e+13	641.6	0.23	10%

Figure 14.61: F25CN182 NUV-MAMA Integrated System Throughput and Redleak


 

Table 14.24: F25CN182 NUV-MAMA Sensitivity & Throughput

	Sensitivity	% Throughput
1300.	5.7E11	0.02
1400.	1.29E12	0.04
1500.	2.43E12	0.07
1600.	5.26E12	0.14
1700.	1.01E13	0.26
1800.	1.57E13	0.38
1900.	2.06E13	0.48
2000.	2.38E13	0.52
2100.	2.21E13	0.46
2200.	1.68E13	0.34
2300.	1.13E13	0.22
2400.	7.47E12	0.14
2500.	5.21E12	0.09
2600.	3.89E12	0.07
2700.	2.98E12	0.05
2800.	2.32E12	0.04

Figure 14.62: Point Source S/N vs. V+AB for the F25CN182 NUV-MAMA mode. Curves are labeled by required exposure time (sec).


 
Figure 14.63: Extended Source S/N vs. V+AB for the F25CN182 NUV-MAMA mode. Top curves are for an area of 0.2 arcsec²; bottom curves are for 1 arcsec². Average sky assumed Curves are labeled by required exposure time (sec).


 

Table 14.25: Radial Profile for F25CN182*

Radius			Fraction of Energy Encircled
Pixels	Arcsec	Intensity
1	0.024	4.177e-02	0.179
1.5	0.037	2.686e-02	0.302
2	0.049	1.620e-02	0.422
3	0.073	5.757e-03	0.565
4	0.098	2.720e-03	0.647
5	0.122	1.425e-03	0.700
10	0.245	2.600e-04	0.810
15	0.367	1.234e-04	0.876
20	0.490	6.357e-05	0.925
25	0.613	3.483e-05	0.956
30	0.735	2.099e-05	0.979
40	0.980	2.113e-06	0.999

* See STIS ISR 2003-01.

Figure 14.64: Point Source Encircled Energy for F25CN182 NUV-MAMA


 
Figure 14.65: Point Source Intensity vs. Radius for F25CN182 NUV-MAMA