ETC Request ID: STIS.ta.1444077

Exposure time (seconds) = 1.0000

gives: SNR = 195.8019

gives: Time to Saturation (for a single exposure) = 7.60 seconds


Plots

Detailed Information Count rate Total counts Associated noise
(e-/s) (e-) (e-)
Counts (box of 3 x 3 pixels)
    Source 39,008.568 39,008.57 197.51
    Background 0.675 0.68 0.82
        Sky 0.432 0.43 0.66
        Dark Current 0.243 0.24 0.49
    Read Out 26.10
Total in selected region 39,009.244 39,009.24 199.22
Brightest Pixel (single exposure) 15,790.694 15,790.69
Global Count Rates
    Source only 78,017.136 78,017.136
    Background (sky+dark) 55,864.519 55,864.52
Background per unit area
    Sky Background (arcsec-2) 19.219 19.219
    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 0.20
Effective Wavelength 6822.24 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: Castelli-Kurucz Models O3V 45000 4.5
Extinction E(B-V): Milky Way Diffuse (Rv=3.1) = 0.08 applied before normalization
Normalization: Renormalized to vegamag = 12.57 in filter Johnson/V
Redshift: None
Emission Lines: None


Selected background:
  Sky Background:
    Level:

Plots

These results were computed using: ETC version 28.2