ETC Request ID: STIS.ta.1364715

Requested Signal/Noise Ratio = 40.000

gives: Time = 0.2958 seconds

gives: Time to Saturation (for a single exposure) = 30.05 seconds


Plots

Detailed Information Count rate Total counts Associated noise
(e-/s) (e-) (e-)
Counts (box of 3 x 3 pixels)
    Source 7,055.663 2,086.92 45.68
    Background 0.235 0.07 0.26
        Sky 0.001 3.11e-04 0.02
        Dark Current 0.234 0.07 0.26
    Read Out 25.20
Total in selected region 7,055.898 2,086.99 52.17
Brightest Pixel (single exposure) 3,993.381 1,181.16
Global Count Rates
    Source only 14,111.327 4,173.849
    Background (sky+dark) 27,330.034 8,083.68
Background per unit area
    Sky Background (arcsec-2) 0.047 0.014
    Dark Current (arcsec-2) 10.400 3.076
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 0.28
Effective Wavelength 3740.45 Å

Instrument name: STIS
Mode: Target Acquisition
Detector: CCD
Acquisition Mode: ACQ
Aperture: F28X50OII
Gain: 4.0
# Frames: 1
Binning: 1
Dark: medium


Target: [point source]
Spectrum: Castelli-Kurucz Models G0I 5500 1.0
Extinction E(B-V): Milky Way Diffuse (Rv=3.1) = 0.295 applied before normalization
Normalization: Renormalized to vegamag = 9.764 in filter Johnson/U
Redshift: None
Emission Lines: None


Selected background:
  Sky Background:
    Level:

Plots

These results were computed using: ETC version 27.2