ETC Request ID: STIS.ta.1371345

Exposure time (seconds) = 0.5000

gives: SNR = 118.0435

gives: Time to Saturation (for a single exposure) = 10.19 seconds


Plots

Detailed Information Count rate Total counts Associated noise
(e-/s) (e-) (e-)
Counts (box of 3 x 3 pixels)
    Source 29,086.066 14,543.03 120.59
    Background 0.666 0.33 0.58
        Sky 0.432 0.22 0.47
        Dark Current 0.234 0.12 0.34
    Read Out 25.20
Total in selected region 29,086.732 14,543.37 123.20
Brightest Pixel (single exposure) 11,775.810 5,887.90
Global Count Rates
    Source only 58,172.132 29,086.066
    Background (sky+dark) 54,817.750 27,408.87
Background per unit area
    Sky Background (arcsec-2) 19.221 9.610
    Dark Current (arcsec-2) 10.400 5.200
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 0.20
Effective Wavelength 6821.41 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: Bruzual Synthetic Stellar Spectra O7 I
Extinction E(B-V): Milky Way Diffuse (Rv=3.1) = 0.05 applied before normalization
Normalization: Renormalized to vegamag = 12.9 in filter Johnson/V
Redshift: None
Emission Lines: None


Selected background:
  Sky Background:
    Level:

Plots

These results were computed using: ETC version 27.2