Space Telescope Imaging Spectrograph Instrument Handbook for Cycle 17

F25ND3-FUV-MAMA

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Description

The F25ND3 mode 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 zero point	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: Throughputs and Sensitivities for F25ND3 FUV-MAMA

	Sensitivity	Throughput %
1150.	1.00E10	3.8E-4
1200.	7.62E10	2.8E-3
1250.	1.15E11	4.0E-3
1300.	1.16E11	3.9E-3
1350.	1.08E11	3.5E-3
1400.	9.64E10	3.0E-3
1450.	7.88E10	2.4E-3
1500.	6.09E10	1.8E-3
1550.	4.68E10	1.3E-3
1600.	3.46E10	9.5E-4
1650.	2.61E10	6.9E-4
1700.	1.79E10	4.6E-4
1750.	1.19E10	3.0E-4
1800.	7.84E9	1.9E-4
1850.	3.11E9	7.4E-5

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).