ETC Request ID: STIS.sp.1011584

Requested Signal/Noise Ratio = 3.000 at wavelength 2500.00 Å (per resolution element)

gives: Time = 1,794.2048 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 0.007 23.46 4.84
    Background 0.011 37.68 6.14
        Sky 8.023e-07 2.88e-03 0.05
        Dark Current 0.011 37.68 6.14
Total in selected region 0.017 61.14 7.82
Brightest Pixel (single exposure) (at 2905.60 Å) 0.022 40.33
Count rate entire detector 1,587.711
Buffer Time (sec) 1,259.68
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 13.105 23,512.175
    Background (sky+dark) 1,574.606 2,825,166.39
Encircled energy fraction 0.86

Instrument name: STIS
Mode: spectroscopic
Detector: NUVMAMA
Central Wavelength:
Grating: [G230L] R ~ 500
Aperture: 52X0.2


Target: [point source]
Spectrum: User uploaded spectrum: 1437faint.dat
Extinction E(B-V): None
Normalization: Renormalized to vegamag = 15.5 in filter Johnson/V
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 25.2