ETC Request ID: STIS.ta.1291333

Requested Signal/Noise Ratio = 40.000

gives: Time = 0.0681 seconds

gives: Time to Saturation (for a single exposure) = 13.34 seconds

Exposure time calculation HAD WARNINGS.

WARNING MESSAGE: Result of the calculation 0.0681193 is less than the minimum exposure time for this detector (0.1)


Plots

Detailed Information Count rate Total counts Associated noise
(e-/s) (e-) (e-)
Counts (box of 3 x 3 pixels)
    Source 30,636.076 2,086.91 45.68
    Background 0.659 0.04 0.21
        Sky 0.434 0.03 0.17
        Dark Current 0.225 0.02 0.12
    Read Out 25.20
Total in selected region 30,636.735 2,086.95 52.17
Brightest Pixel (single exposure) 8,995.239 612.75
Global Count Rates
    Source only 61,272.152 4,173.819
    Background (sky+dark) 53,877.858 3,670.12
Background per unit area
    Sky Background (arcsec-2) 19.296 1.314
    Dark Current (arcsec-2) 10.000 0.681
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 0.15
Effective Wavelength 8343.06 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_M4.5.csv
Extinction E(B-V): None
Normalization: Renormalized to vegamag = 15.35 in filter Johnson/V
Redshift: None
Emission Lines: None


Selected background:
  Sky Background:
    Level:

Plots

These results were computed using: ETC version 26.1