ETC Request ID: STIS.ta.1038610

Exposure time (seconds) = 0.2000

gives: SNR = 126.6015

gives: Time to Saturation (for a single exposure) = 2.97 seconds


Plots

Detailed Information Count rate Total counts Associated noise
(e-/s) (e-) (e-)
Counts (box of 3 x 3 pixels)
    Source 83,059.314 16,611.86 128.89
    Background 0.164 0.03 0.18
        Sky 0.002 3.13e-04 0.02
        Dark Current 0.162 0.03 0.18
    Read Out 24.60
Total in selected region 83,059.477 16,611.90 131.21
Brightest Pixel (single exposure) 40,440.857 8,088.17
Global Count Rates
    Source only 166,118.627 33,223.725
    Background (sky+dark) 18,917.910 3,783.58
Background per unit area
    Sky Background (arcsec-2) 0.070 0.014
    Dark Current (arcsec-2) 7.200 1.440
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 0.24
Effective Wavelength 5372.76 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: Castelli-Kurucz Models B0III 29000 3.5
Extinction E(B-V): Milky Way Diffuse (Rv=3.1) = 0.14 applied before normalization
Normalization: Renormalized to vegamag = 6.279 in filter Johnson/V
Redshift: None
Emission Lines: None


Selected background:
  Sky Background:
    Level:

Plots

These results were computed using: ETC version 25.2