Space Telescope Imaging Spectrograph Instrument Handbook for Cycle 14

F25ND3-FUV-MAMA

---

Description

The F25ND3mode with the FUV-MAMA detector provides broad band imaging with an attenuation of 10^-3. The field of view is 25x25 arcsec. The R₈₀ and central pixel flux are unmeasured but assumed to be approximately the same as produced by the F25QTZ filter

Recommended Uses

Recommended for broad-band imaging of bright objects requiring 10^-3 attenuation to meet FUV-MAMA bright-object protection limits.

Pivot (Å)	FWHM (Å)	AB mag zeropoint	Speak	B	R80 (arcsec)	Flux in central pixel
1376.0	316.2	16.070	1.26e+11	368.9	0.28	10%

Figure 14.71: F25ND3 FUV-MAMA Integrated System Throughput and Redleak


 

Table 14.28: Throughput and Sensitivity for F25ND3 FUV-MAMA

l	Sensitivity	Throughput %
1150.	1.07E10	0.41e-3
1175.	4.69E10	1.75e-3
1200.	8.42E10	3.08e-3
1225.	1.14E11	4.08e-3
1250.	1.24E11	4.35e-3
1300.	1.25E11	4.22e-3
1350.	1.20E11	3.91e-3
1375.	1.16E11	3.71e-3
1400.	1.10E11	3.46e-3
1425.	1.03E11	3.16e-3
1450.	9.37E10	2.84e-3
1475.	8.49E10	2.53e-3
1500.	7.59E10	2.22e-3
1550.	5.93E10	1.68e-3
1600.	4.37E10	1.20e-3
1650.	3.20E10	0.85e-3
1700.	2.16E10	0.56e-3
1750.	1.45E10	0.36e-3
1800.	9.53E9	0.23e-3
1850.	3.53E9	0.08e-3
1875.	1.64E9	0.04e-3

Figure 14.72: Point Source S/N vs. V+AB for the F25ND3 FUV-MAMA mode. Curves are labeled by required exposure time (sec).


 
Figure 14.73: Extended Source S/N vs. V+AB for the F25ND3 FUV-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).


 

	Space Telescope Science Institute http://www.stsci.edu Voice: (410) 338-1082 help@stsci.edu