ETC Request ID: STIS.sp.1174946

Requested Signal/Noise Ratio = 10.000 at wavelength 2750.00 Å (per resolution element)

gives: Time = 2,185.4037 seconds


Table of Source and Noise Counts per Pixel

Plots

Detailed Information Count rate Total counts Associated noise
(counts/s) (counts) (counts)
Counts (box 7 pixels high) (1 pix x 7 pix) (2 pix resel x 7 pix)
    Source 0.031 134.26 11.59
    Background 0.011 45.99 6.78
        Sky 2.298e-05 0.10 0.32
        Dark Current 0.011 45.89 6.77
Total in selected region 0.041 180.25 13.43
Brightest Pixel (single exposure) (at 2796.80 Å) 0.153 335.04
Count rate entire detector 1,606.181
Buffer Time (sec) 1,245.19
For APT purposes, the recommended buffer time should be 4/5 of the buffer time calculated above. Please refer to the STIS Instrument Handbook for more details.
Global Count Rates
    Source only 16.126 35,241.991
    Background (sky+dark) 1,590.055 3,474,911.37
Encircled energy fraction 0.86

Instrument name: STIS
Mode: spectroscopic
Detector: NUVMAMA
Central Wavelength:
Grating: [G230L] R ~ 500
Aperture: 52X2


Target: [point source]
Spectrum: User uploaded spectrum: muscles_M3.5.csv
Extinction E(B-V): None
Normalization: Renormalized to abmag = 21.32 in filter Galex/NUV
Redshift: None
Emission Lines: None


Selected background:
  Sky Background:
    Level:

Table of Source and Noise Counts per Pixel

Plots

These results were computed using: ETC version 26.1