ETC Request ID: STIS.sp.1003509

Exposure time (seconds) = 7,875.0000 at wavelength 1900.00 Å

gives: SNR = 6.0595 (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 0.006 98.42 9.92
    Background 0.011 165.38 12.86
        Sky 2.664e-08 4.20e-04 0.02
        Dark Current 0.011 165.38 12.86
Total in selected region 0.017 263.79 16.24
Brightest Pixel (single exposure) (at 2465.60 Å) 0.006 44.12
Count rate entire detector 1,582.367
Buffer Time (sec) 1,263.93
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 7.761 61,115.695
    Background (sky+dark) 1,574.606 12,400,025.58
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 30000.0K
Extinction E(B-V): None
Normalization: Renormalized to abmag = 22.0 in filter Sloan/R
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 25.2