ETC Request ID: STIS.ta.1038557

Exposure time (seconds) = 0.1000

gives: SNR = 97.0357

gives: Time to Saturation (for a single exposure) = 2.89 seconds


Plots

Detailed Information Count rate Total counts Associated noise
(e-/s) (e-) (e-)
Counts (box of 3 x 3 pixels)
    Source 99,865.256 9,986.53 99.93
    Background 0.164 0.02 0.13
        Sky 0.002 1.57e-04 0.01
        Dark Current 0.162 0.02 0.13
    Read Out 24.60
Total in selected region 99,865.419 9,986.54 102.92
Brightest Pixel (single exposure) 41,564.479 4,156.45
Global Count Rates
    Source only 199,730.511 19,973.051
    Background (sky+dark) 18,917.910 1,891.79
Background per unit area
    Sky Background (arcsec-2) 0.070 0.007
    Dark Current (arcsec-2) 7.200 0.720
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 6663.81 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 B0I 26000 3.0
Extinction E(B-V): Milky Way Diffuse (Rv=3.1) = 0.78 applied before normalization
Normalization: Renormalized to vegamag = 6.13 in filter Johnson/V
Redshift: None
Emission Lines: None


Selected background:
  Sky Background:
    Level:

Plots

These results were computed using: ETC version 25.2