ETC Request ID: STIS.ta.1368273

Requested Signal/Noise Ratio = 40.000

gives: Time = 0.1697 seconds

gives: Time to Saturation (for a single exposure) = 6.90 seconds


Plots

Detailed Information Count rate Total counts Associated noise
(e-/s) (e-) (e-)
Counts (box of 32 x 32 pixels)
    Source 68,235.246 11,582.06 107.62
    Background 26.625 4.52 2.13
        Sky 0.001 2.38e-04 0.02
        Dark Current 26.624 4.52 2.13
    Read Out 268.80
Total in selected region 68,261.872 11,586.58 289.55
Brightest Pixel (single exposure) 17,398.549 2,953.18
Global Count Rates
    Source only 72,115.515 12,240.682
    Background (sky+dark) 27,262.977 4,627.54
Background per unit area
    Sky Background (arcsec-2) 0.140 0.024
    Dark Current (arcsec-2) 10.400 1.765
Extraction region
box of 32 x 32 pixels
    Effective Sky Area (pixels) 4.00
    Fraction of flux 0.95
    Fraction of flux in brightest pixel 0.24
Effective Wavelength 5456.47 Å

Instrument name: STIS
Mode: Target Acquisition
Detector: CCD
Acquisition Mode: ACQ/PEAK
Aperture: 0.2X0.05ND
Gain: 4.0
# Frames: 1
Binning: 1
Dark: medium


Target: [point source]
Spectrum: Castelli-Kurucz Models A5V 8250 4.0
Extinction E(B-V): Milky Way Diffuse (Rv=3.1) = 0.042 applied before normalization
Normalization: Renormalized to vegamag = 7.992 in filter Johnson/V
Redshift: None
Emission Lines: None


Selected background:
  Sky Background:
    Level:

Plots

These results were computed using: ETC version 27.2