ETC Request ID: STIS.sp.1365735

Exposure time (seconds) = 1,000.0000 at wavelength 2263.00 Å

gives: SNR = 0.7742 (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 0.002 4.43 2.10
    Background 0.014 28.00 5.29
        Sky 4.760e-10 9.52e-07 9.76e-04
        Dark Current 0.014 28.00 5.29
Total in selected region 0.016 32.43 5.72
Brightest Pixel (single exposure) (at 2175.36 Å) 1.843 1,843.40
Count rate entire detector 2,395.955
Buffer Time (sec) 834.74
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 220.031 220,031.269
    Background (sky+dark) 2,097.152 2,097,152.01
Encircled energy fraction 0.93

Instrument name: STIS
Mode: spectroscopic
Detector: NUVMAMA
Central Wavelength: 2263
Grating: [E230H] R ~ 114000
Aperture: 0.2X0.09


Target: [point source]
Spectrum: User uploaded spectrum: watlas-H.dat
Extinction E(B-V): None
Normalization: None
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 27.2