ETC Request ID: STIS.ta.1038383

Exposure time (seconds) = 5.0000

gives: SNR = 63.2141

gives: Time to Saturation (for a single exposure) = 307.62 seconds


Plots

Detailed Information Count rate Total counts Associated noise
(e-/s) (e-) (e-)
Counts (box of 3 x 3 pixels)
    Source 906.101 4,530.51 67.31
    Background 0.162 0.81 0.90
        Sky 8.945e-06 4.47e-05 6.69e-03
        Dark Current 0.162 0.81 0.90
    Read Out 24.60
Total in selected region 906.263 4,531.32 71.67
Brightest Pixel (single exposure) 390.091 1,950.46
Global Count Rates
    Source only 1,812.202 9,061.010
    Background (sky+dark) 18,874.616 94,373.08
Background per unit area
    Sky Background (arcsec-2) 3.975e-04 0.002
    Dark Current (arcsec-2) 7.200 36.000
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 6452.22 Å

Instrument name: STIS
Mode: Target Acquisition
Detector: CCD
Acquisition Mode: ACQ
Aperture: F25ND5
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) = 0.3 applied before normalization
Normalization: Renormalized to vegamag = 5.32 in filter Johnson/V
Redshift: None
Emission Lines: None


Selected background:
  Sky Background:
    Level:

Plots

These results were computed using: ETC version 25.2