ETC Request ID: STIS.sp.1366522

Exposure time (seconds) = 6,540.0000 at wavelength 2300.00 Å

gives: SNR = 5.5354 (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 0.007 91.78 9.58
    Background 0.014 183.13 13.53
        Sky 6.012e-07 7.86e-03 0.09
        Dark Current 0.014 183.12 13.53
Total in selected region 0.021 274.91 16.58
Brightest Pixel (single exposure) (at 2465.60 Å) 0.005 32.89
Count rate entire detector 2,104.226
Buffer Time (sec) 950.47
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 5.356 35,029.434
    Background (sky+dark) 2,098.870 13,726,609.83
Encircled energy fraction 0.85

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: Renormalized to abmag = 21.4 in filter WFC3/UVIS1/F200LP
Redshift: z=0.073
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