ETC Request ID: STIS.im.1012745

Exposure time (seconds) = 800.0000

gives: SNR = 27.5319


Plots

Detailed Information Count rate Total counts Associated noise
(counts/s) (counts) (counts)
Counts (circle with radius 0.5 arcsec)
    Source 1.923 1,538.72 39.23
    Background 1.981 1,584.83 39.81
        Sky 0.001 0.83 0.91
        Dark Current 1.980 1,584.00 39.80
Total in selected region 3.904 3,123.56 55.89
Brightest Pixel (single exposure) 0.003 2.37
Count rate entire detector 1,696.790
Buffer Time (sec) 1,178.70
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 123.098 98,478.236
    Background (sky+dark) 1,573.693 1,258,954.00
Background per unit area
    Sky Background (arcsec-2) 0.001 1.062
    Dark Current (arcsec-2) 2.519 2,015.587
Extraction region
circle with radius 0.5 arcsec
    Effective Sky Area (pixels) 1,319.20
Effective Wavelength 1998.44 Å

Instrument name: STIS
Mode: imaging
Detector: NUVMAMA
Aperture: F25CIII


Target: [extended source]
Source diameter (arcsec): 8.0
Spectrum: Flat in units of Fν
Extinction E(B-V): None
Normalization: Flux 1.27e-15 flam at 1909.0 Å
Redshift: z=0.009453
Emission Lines:
Line at Center 1927.0 Å    FWHM 5.0 Å   Flux 1.27e-14 Fλ


Selected background:
  Sky Background:
    Level:

Plots

These results were computed using: ETC version 25.2