ETC Request ID: STIS.ta.994758

Requested Signal/Noise Ratio = 40.000

gives: Time = 0.1720 seconds

gives: Time to Saturation (for a single exposure) = 24.50 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 12,022.025 2,068.24 45.48
    Background 0.598 0.10 0.32
        Sky 0.436 0.07 0.27
        Dark Current 0.162 0.03 0.17
    Read Out 24.60
Total in selected region 12,022.623 2,068.34 51.71
Brightest Pixel (single exposure) 4,897.918 842.62
Global Count Rates
    Source only 24,044.051 4,136.470
    Background (sky+dark) 46,640.529 8,023.90
Background per unit area
    Sky Background (arcsec-2) 19.368 3.332
    Dark Current (arcsec-2) 7.200 1.239
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 6786.02 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: Kurucz Models B0V 30000 4.0
Extinction E(B-V): None
Normalization: Renormalized to vegamag = 12.46 in filter Johnson/U
Redshift: None
Emission Lines: None


Selected background:
  Sky Background:
    Level:

Plots

These results were computed using: ETC version 25.1.1