ETC Request ID: STIS.ta.1291335

Requested Signal/Noise Ratio = 40.000

gives: Time = 0.0183 seconds

gives: Time to Saturation (for a single exposure) = 3.48 seconds

Exposure time calculation HAD WARNINGS.

WARNING MESSAGE: Result of the calculation 0.0183187 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 113,921.344 2,086.89 45.68
    Background 0.659 0.01 0.11
        Sky 0.434 7.95e-03 0.09
        Dark Current 0.225 4.12e-03 0.06
    Read Out 25.20
Total in selected region 113,922.004 2,086.90 52.17
Brightest Pixel (single exposure) 34,455.711 631.18
Global Count Rates
    Source only 227,842.689 4,173.778
    Background (sky+dark) 53,877.858 986.97
Background per unit area
    Sky Background (arcsec-2) 19.296 0.353
    Dark Current (arcsec-2) 10.000 0.183
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 8223.63 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_M5.csv
Extinction E(B-V): None
Normalization: Renormalized to vegamag = 13.67 in filter Johnson/V
Redshift: None
Emission Lines: None


Selected background:
  Sky Background:
    Level:

Plots

These results were computed using: ETC version 26.1