ETC Request ID: STIS.ta.1006664

Exposure time (seconds) = 0.3000

gives: SNR = 70.5496

gives: Time to Saturation (for a single exposure) = 15.58 seconds


Plots

Detailed Information Count rate Total counts Associated noise
(e-/s) (e-) (e-)
Counts (box of 3 x 3 pixels)
    Source 18,408.954 5,522.69 74.31
    Background 0.163 0.05 0.22
        Sky 0.001 3.28e-04 0.02
        Dark Current 0.162 0.05 0.22
    Read Out 24.60
Total in selected region 18,409.117 5,522.74 78.28
Brightest Pixel (single exposure) 7,702.030 2,310.61
Global Count Rates
    Source only 36,817.909 11,045.373
    Background (sky+dark) 18,944.019 5,683.21
Background per unit area
    Sky Background (arcsec-2) 0.049 0.015
    Dark Current (arcsec-2) 7.200 2.160
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 6633.56 Å

Instrument name: STIS
Mode: Target Acquisition
Detector: CCD
Acquisition Mode: ACQ
Aperture: F28X50OIII
Gain: 4.0
# Frames: 1
Binning: 1
Dark: medium


Target: [point source]
Spectrum: Castelli-Kurucz Models B5I 14000 2.5
Extinction E(B-V): Milky Way Diffuse (Rv=3.1) = 0.52 applied before normalization
Normalization: Renormalized to vegamag = 7.57 in filter Johnson/V
Redshift: None
Emission Lines: None


Selected background:
  Sky Background:
    Level:

Plots

These results were computed using: ETC version 25.2