ETC Request ID: STIS.sp.1182944

Requested Signal/Noise Ratio = 17.000 at wavelength 2074.50 Å (per resolution element)

gives: Time = 69,888.3310 seconds


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 0.006 825.96 28.74
    Background 0.011 1,467.65 38.31
        Sky 1.496e-10 2.09e-05 4.57e-03
        Dark Current 0.011 1,467.65 38.31
Total in selected region 0.016 2,293.62 48.59
Brightest Pixel (single exposure) (at 2193.66 Å) 0.007 491.90
Count rate entire detector 1,727.994
Buffer Time (sec) 1,157.41
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 107.581 7,518,627.646
    Background (sky+dark) 1,572.864 109,924,840.25
Encircled energy fraction 0.93

Instrument name: STIS
Mode: spectroscopic
Detector: NUVMAMA
Central Wavelength: 2063
Grating: [E230H] R ~ 114000
Aperture: 0.2X0.09


Target: [point source]
Spectrum: User uploaded spectrum: t5500feh150.dat
Extinction E(B-V): Milky Way Diffuse (Rv=3.1) = 0.01 applied before normalization
Normalization: Renormalized to vegamag = 9.02 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 26.1