ETC Request ID: STIS.sp.1006791

Exposure time (seconds) = 2,125.0000 at wavelength 1347.00 Å

gives: SNR = 18.9706 (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 7 pix) (2 pix resel x 7 pix)
    Source 0.099 422.10 20.55
    Background 0.001 4.46 2.11
        Sky 4.233e-15 1.80e-11 4.24e-06
        Dark Current 0.001 4.46 2.11
Total in selected region 0.100 426.56 22.25
Brightest Pixel (single exposure) (at 1345.36 Å) 0.037 78.27
Count rate entire detector 5,122.481
Buffer Time (sec) 390.44
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 2,903.616 6,170,184.557
    Background (sky+dark) 157.308 334,279.47
Encircled energy fraction 0.93

Instrument name: STIS
Mode: spectroscopic
Detector: FUVMAMA
Central Wavelength: 1343
Grating: [E140H] R ~ 114000
Aperture: 0.2X0.2
Glow region: low


Target: [point source]
Spectrum: Castelli-Kurucz Models B5I 14000 2.5
Extinction E(B-V): Milky Way Diffuse (Rv=3.1) = 0.52 applied before normalization
Normalization: Renormalized to vegamag = 7.57 in filter Johnson/V
Redshift: None
Emission Lines: None


Selected background:
  Sky Background:
    Earth Shine: Average
    Zodiacal Light: Average
    Air Glow: Average

Table of Source and Noise Counts per Pixel

Plots

These results were computed using: ETC version 25.2