ETC Request ID: STIS.sp.1375353

Exposure time (seconds) = 2,240.0000 at wavelength 2500.00 Å

gives: SNR = 7.1996 (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 0.020 88.55 9.41
    Background 0.014 62.72 7.92
        Sky 7.943e-07 3.56e-03 0.06
        Dark Current 0.014 62.72 7.92
Total in selected region 0.034 151.27 12.30
Brightest Pixel (single exposure) (at 2777.60 Å) 0.013 28.48
Count rate entire detector 2,113.369
Buffer Time (sec) 946.36
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 14.499 32,478.646
    Background (sky+dark) 2,098.870 4,701,468.81
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: Black body at 10000.0K
Extinction E(B-V): Milky Way Diffuse (Rv=3.1) = 0.27 applied before normalization
Normalization: Renormalized to vegamag = 18.0 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 27.2