ETC Request ID: STIS.ta.821996

Exposure time (seconds) = 1.0000

gives: SNR = 52.0958

gives: Time to Saturation (for a single exposure) = 89.27 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 3,256.104 3,256.10 57.06
    Background 0.171 0.17 0.41
        Sky 8.950e-06 8.95e-06 2.99e-03
        Dark Current 0.171 0.17 0.41
    Read Out 25.50
Total in selected region 3,256.275 3,256.27 62.50
Brightest Pixel (single exposure) 1,344.171 1,344.17
Global Count Rates
    Source only 6,512.207 6,512.207
    Background (sky+dark) 19,923.193 19,923.19
Background per unit area
    Sky Background (arcsec-2) 3.978e-04 3.978e-04
    Dark Current (arcsec-2) 7.600 7.600
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 6710.97 Å

Instrument name: STIS
Mode: Target Acquisition
Detector: CCD
Acquisition Mode: ACQ
Aperture: F25ND5
Gain: 4.0
# Frames: 1
Binning: 1
Dark:


Target: [point source]
Spectrum: Castelli-Kurucz Models A5V 8250 4.0
Extinction E(B-V): None
Normalization: Renormalized to vegamag = 3.86 in filter Johnson/V
Redshift: None
Emission Lines: None


Selected background:
  Sky Background:
    Level:

Plots

These results were computed using: ETC version 24.2