ETC Request ID: STIS.sp.1183931

Exposure time (seconds) = 5,112.0000 at wavelength 1900.00 Å

gives: SNR = 7.2714 (per resolution element)


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 0.010 106.28 10.31
    Background 0.011 107.35 10.36
        Sky 2.648e-08 2.71e-04 0.02
        Dark Current 0.011 107.35 10.36
Total in selected region 0.021 213.63 14.62
Brightest Pixel (single exposure) (at 2465.60 Å) 0.010 51.21
Count rate entire detector 1,590.428
Buffer Time (sec) 1,257.52
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 15.843 80,988.766
    Background (sky+dark) 1,574.585 8,049,278.51
Encircled energy fraction 0.84

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


Target: [point source]
Spectrum: Black body at 20000.0K
Extinction E(B-V): None
Normalization: Flux 2.7e-16 flam at 1950.0 Å
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