ETC Request ID: STIS.ta.1006964

Requested Signal/Noise Ratio = 100.000

gives: Time = 0.5907 seconds

gives: Time to Saturation (for a single exposure) = 16.04 seconds


Plots

Detailed Information Count rate Total counts Associated noise
(e-/s) (e-) (e-)
Counts (box of 3 x 3 pixels)
    Source 17,898.256 10,572.48 102.82
    Background 0.164 0.10 0.31
        Sky 0.002 9.26e-04 0.03
        Dark Current 0.162 0.10 0.31
    Read Out 24.60
Total in selected region 17,898.419 10,572.58 105.72
Brightest Pixel (single exposure) 7,481.592 4,419.37
Global Count Rates
    Source only 35,796.512 21,144.966
    Background (sky+dark) 18,917.910 11,174.79
Background per unit area
    Sky Background (arcsec-2) 0.070 0.041
    Dark Current (arcsec-2) 7.200 4.253
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 0.21
Effective Wavelength 6638.81 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: Kurucz Models F8V 6200 4.4
Extinction E(B-V): None
Normalization: Renormalized to vegamag = 7.91 in filter Johnson/V
Redshift: None
Emission Lines: None


Selected background:
  Sky Background:
    Level:

Plots

These results were computed using: ETC version 25.2