ETC Request ID: STIS.ta.1291324

Requested Signal/Noise Ratio = 40.000

gives: Time = 0.0071 seconds

gives: Time to Saturation (for a single exposure) = 1.17 seconds

Exposure time calculation HAD WARNINGS.

WARNING MESSAGE: Result of the calculation 0.00710433 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 293,748.254 2,086.88 45.68
    Background 0.659 4.68e-03 0.07
        Sky 0.434 3.08e-03 0.06
        Dark Current 0.225 1.60e-03 0.04
    Read Out 25.20
Total in selected region 293,748.914 2,086.89 52.17
Brightest Pixel (single exposure) 102,313.249 726.87
Global Count Rates
    Source only 587,496.509 4,173.769
    Background (sky+dark) 53,877.858 382.77
Background per unit area
    Sky Background (arcsec-2) 19.296 0.137
    Dark Current (arcsec-2) 10.000 0.071
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 0.17
Effective Wavelength 7604.02 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_M1.5.csv
Extinction E(B-V): None
Normalization: Renormalized to vegamag = 11.7 in filter Johnson/V
Redshift: None
Emission Lines: None


Selected background:
  Sky Background:
    Level:

Plots

These results were computed using: ETC version 26.1