ETC Request ID: STIS.ta.1368418

Requested Signal/Noise Ratio = 40.000

gives: Time = 0.6013 seconds

gives: Time to Saturation (for a single exposure) = 85.54 seconds


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Detailed Information Count rate Total counts Associated noise
(e-/s) (e-) (e-)
Counts (box of 3 x 3 pixels)
    Source 3,470.872 2,086.97 45.68
    Background 0.236 0.14 0.38
        Sky 0.002 9.37e-04 0.03
        Dark Current 0.234 0.14 0.38
    Read Out 25.20
Total in selected region 3,471.108 2,087.11 52.17
Brightest Pixel (single exposure) 1,402.834 843.50
Global Count Rates
    Source only 6,941.744 4,173.939
    Background (sky+dark) 27,306.262 16,418.74
Background per unit area
    Sky Background (arcsec-2) 0.069 0.042
    Dark Current (arcsec-2) 10.400 6.253
Extraction region
box of 3 x 3 pixels
    Effective Sky Area (pixels) 9.00
    Fraction of flux 0.50
    Fraction of flux in brightest pixel 0.20
Effective Wavelength 6831.03 Å

Instrument name: STIS
Mode: Target Acquisition
Detector: CCD
Acquisition Mode: ACQ
Aperture: F25ND3
Gain: 4.0
# Frames: 1
Binning: 1
Dark: medium


Target: [point source]
Spectrum: Black body at 5750.0K
Extinction E(B-V): Milky Way Diffuse (Rv=3.1) = 0.04 applied before normalization
Normalization: Renormalized to vegamag = 9.8 in filter Johnson/V
Redshift: None
Emission Lines: None


Selected background:
  Sky Background:
    Level:

Plots

These results were computed using: ETC version 27.2