ETC Request ID: STIS.ta.1291329

Requested Signal/Noise Ratio = 40.000

gives: Time = 0.0807 seconds

gives: Time to Saturation (for a single exposure) = 14.56 seconds

Exposure time calculation HAD WARNINGS.

WARNING MESSAGE: Result of the calculation 0.0807253 is less than the minimum exposure time for this detector (0.1)


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Detailed Information Count rate Total counts Associated noise
(e-/s) (e-) (e-)
Counts (box of 3 x 3 pixels)
    Source 25,852.063 2,086.91 45.68
    Background 0.659 0.05 0.23
        Sky 0.434 0.04 0.19
        Dark Current 0.225 0.02 0.13
    Read Out 25.20
Total in selected region 25,852.722 2,086.97 52.17
Brightest Pixel (single exposure) 8,243.262 665.44
Global Count Rates
    Source only 51,704.126 4,173.829
    Background (sky+dark) 53,877.858 4,349.30
Background per unit area
    Sky Background (arcsec-2) 19.296 1.558
    Dark Current (arcsec-2) 10.000 0.807
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 0.16
Effective Wavelength 8001.89 Å

Instrument name: STIS
Mode: Target Acquisition
Detector: CCD
Acquisition Mode: ACQ
Aperture: F28X50LP
Gain: 4.0
# Frames: 1
Binning: 1
Dark: medium


Target: [point source]
Spectrum: User uploaded spectrum: muscles_M3.5.csv
Extinction E(B-V): None
Normalization: Renormalized to vegamag = 14.9 in filter Johnson/V
Redshift: None
Emission Lines: None


Selected background:
  Sky Background:
    Level:

Plots

These results were computed using: ETC version 26.1