ETC Request ID: STIS.sp.1004820

Exposure time (seconds) = 332.0000 at wavelength 3000.00 Å

gives: SNR = 24.8498 (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 0.955 633.84 25.18
    Background 0.011 6.97 2.64
        Sky 5.045e-08 3.35e-05 5.79e-03
        Dark Current 0.011 6.97 2.64
Total in selected region 0.965 640.82 25.51
Brightest Pixel (single exposure) (at 2914.98 Å) 0.474 157.53
Count rate entire detector 12,126.915
Buffer Time (sec) 164.92
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 8,580.524 2,848,734.103
    Background (sky+dark) 1,572.868 522,192.04
Encircled energy fraction 0.93

Instrument name: STIS
Mode: spectroscopic
Detector: NUVMAMA
Central Wavelength: 2707
Grating: [E230M] R ~ 30000
Aperture: 0.2X0.2


Target: [point source]
Spectrum: Pickles Models G2V 5636.38K
Extinction E(B-V): None
Normalization: Renormalized to vegamag = 7.65 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 25.2