ETC Request ID: STIS.ta.1038654

Exposure time (seconds) = 0.4000

gives: SNR = 207.9993

gives: Time to Saturation (for a single exposure) = 2.50 seconds


Plots

Detailed Information Count rate Total counts Associated noise
(e-/s) (e-) (e-)
Counts (box of 3 x 3 pixels)
    Source 109,651.741 43,860.70 209.43
    Background 0.164 0.07 0.26
        Sky 0.002 6.27e-04 0.03
        Dark Current 0.162 0.06 0.25
    Read Out 24.60
Total in selected region 109,651.905 43,860.76 210.87
Brightest Pixel (single exposure) 48,008.632 19,203.45
Global Count Rates
    Source only 219,303.482 87,721.393
    Background (sky+dark) 18,917.910 7,567.16
Background per unit area
    Sky Background (arcsec-2) 0.070 0.028
    Dark Current (arcsec-2) 7.200 2.880
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 0.22
Effective Wavelength 6311.88 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) = 0.62 applied before normalization
Normalization: Renormalized to vegamag = 5.95 in filter Johnson/V
Redshift: None
Emission Lines: None


Selected background:
  Sky Background:
    Level:

Plots

These results were computed using: ETC version 25.2