ETC Request ID: STIS.sp.994763

Exposure time (seconds) = 900.0000 at wavelength 1400.00 Å

gives: SNR = 11.3062 (per resolution element)


Table of Source and Noise Counts per Pixel

Plots

Detailed Information Count rate Total counts Associated noise
(counts/s) (counts) (counts)
Counts (box 7 pixels high) (1 pix x pix) (2.0 pix resel x pix)
    Source 0.084 151.54 12.31
    Background 0.001 1.89 1.37
        Sky 1.490e-14 2.68e-11 5.18e-06
        Dark Current 0.001 1.89 1.37
Total in selected region 0.085 153.43 13.40
Brightest Pixel (single exposure) (at 1320.44 Å) 0.065 58.78
Count rate entire detector 5,771.130
Buffer Time (sec) 346.55
For APT purposes, the recommended buffer time should be 4/5 of the buffer time calculated above. Please refer to the STIS Instrument Handbook for more details.
Global Count Rates
    Source only 3,381.752 3,043,577.211
    Background (sky+dark) 157.420 141,678.11
Encircled energy fraction 0.94

Instrument name: STIS
Mode: spectroscopic
Detector: FUVMAMA
Central Wavelength: 1425
Grating: [E140M] R ~ 45800
Aperture: 0.2X0.2
Glow region: low


Target: [point source]
Spectrum: Kurucz Models B0V 30000 4.0
Extinction E(B-V): None
Normalization: Renormalized to vegamag = 12.14 in filter Johnson/U
Redshift: None
Emission Lines: None


Selected background:
  Sky Background:
    Level:

Table of Source and Noise Counts per Pixel

Plots

These results were computed using: ETC version 25.1.1