ETC Request ID: STIS.ta.1431041

Exposure time (seconds) = 1.0000

gives: SNR = 104.1643

gives: Time to Saturation (for a single exposure) = 24.31 seconds


Plots

Detailed Information Count rate Total counts Associated noise
(e-/s) (e-) (e-)
Counts (box of 3 x 3 pixels)
    Source 11,493.512 11,493.51 107.21
    Background 0.243 0.24 0.49
        Sky 8.888e-06 8.89e-06 2.98e-03
        Dark Current 0.243 0.24 0.49
    Read Out 26.10
Total in selected region 11,493.755 11,493.76 110.34
Brightest Pixel (single exposure) 4,936.776 4,936.78
Global Count Rates
    Source only 22,987.025 22,987.025
    Background (sky+dark) 28,311.799 28,311.80
Background per unit area
    Sky Background (arcsec-2) 3.950e-04 3.950e-04
    Dark Current (arcsec-2) 10.800 10.800
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 6470.81 Å

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


Target: [point source]
Spectrum: Castelli-Kurucz Models O9V 33000 4.0
Extinction E(B-V): Milky Way Diffuse (Rv=3.1) = 0.36 applied before normalization
Normalization: Renormalized to vegamag = 2.56 in filter Johnson/V
Redshift: None
Emission Lines: None


Selected background:
  Sky Background:
    Level:

Plots

These results were computed using: ETC version 28.1