ETC Request ID: STIS.ta.1038660

Exposure time (seconds) = 1.0000

gives: SNR = 177.9421

gives: Time to Saturation (for a single exposure) = 9.54 seconds


Plots

Detailed Information Count rate Total counts Associated noise
(e-/s) (e-) (e-)
Counts (box of 3 x 3 pixels)
    Source 32,257.571 32,257.57 179.60
    Background 0.164 0.16 0.40
        Sky 0.002 1.57e-03 0.04
        Dark Current 0.162 0.16 0.40
    Read Out 24.60
Total in selected region 32,257.735 32,257.74 181.28
Brightest Pixel (single exposure) 12,576.920 12,576.92
Global Count Rates
    Source only 64,515.143 64,515.143
    Background (sky+dark) 18,917.910 18,917.91
Background per unit area
    Sky Background (arcsec-2) 0.070 0.070
    Dark Current (arcsec-2) 7.200 7.200
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 0.19
Effective Wavelength 7029.31 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 O9V 33000. 4.0
Extinction E(B-V): Milky Way Diffuse (Rv=3.1) = 1.08 applied before normalization
Normalization: Renormalized to vegamag = 7.5 in filter Johnson/V
Redshift: None
Emission Lines: None


Selected background:
  Sky Background:
    Level:

Plots

These results were computed using: ETC version 25.2