ETC Request ID: STIS.sp.1186984

Exposure time (seconds) = 2,000.0000 at wavelength 1900.00 Å

gives: SNR = 15.2639 (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 0.067 269.32 16.41
    Background 0.011 42.00 6.48
        Sky 2.648e-08 1.06e-04 0.01
        Dark Current 0.011 42.00 6.48
Total in selected region 0.078 311.32 17.64
Brightest Pixel (single exposure) (at 2662.40 Å) 0.142 284.38
Count rate entire detector 1,803.512
Buffer Time (sec) 1,108.95
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 228.927 457,853.847
    Background (sky+dark) 1,574.585 3,149,170.00
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 10000.0K
Extinction E(B-V): None
Normalization: Flux 1.8e-15 flam at 1900.0 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