ETC Request ID: STIS.ta.1012634

Requested Signal/Noise Ratio = 40.000

gives: Time = 10.3947 seconds

gives: Time to Saturation (for a single exposure) = 1,696.80 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 199.340 2,072.08 45.52
    Background 0.597 6.20 2.49
        Sky 0.435 4.52 2.13
        Dark Current 0.162 1.68 1.30
    Read Out 24.60
Total in selected region 199.937 2,078.28 51.80
Brightest Pixel (single exposure) 70.721 735.13
Global Count Rates
    Source only 398.679 4,144.157
    Background (sky+dark) 46,585.728 484,245.34
Background per unit area
    Sky Background (arcsec-2) 19.330 200.929
    Dark Current (arcsec-2) 7.200 74.842
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 0.18
Effective Wavelength 7521.01 Å

Instrument name: STIS
Mode: Target Acquisition
Detector: CCD
Acquisition Mode: ACQ
Aperture: F28X50LP
Gain: 4.0
# Frames: 1
Binning: 1
Dark: medium


Target: [point source]
Spectrum: Flat in units of Fλ
Extinction E(B-V): None
Normalization: Renormalized to vegamag = 19.3 in filter Johnson/V
Redshift: None
Emission Lines: None


Selected background:
  Sky Background:
    Level:

Plots

These results were computed using: ETC version 25.2