ETC Request ID: STIS.sp.1367898
Requested Signal/Noise Ratio = 5.000 at wavelength 2500.00 Å (per resolution element)
gives: Time = 121.0231 seconds
Table of Source and Noise Counts per Pixel
| 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 | 0.116 | 28.02 | 5.29 |
| Background | 0.014 | 3.39 | 1.84 |
| Sky | 1.403e-07 | 3.40e-05 | 5.83e-03 |
| Dark Current | 0.014 | 3.39 | 1.84 |
| Total in selected region | 0.130 | 31.41 | 5.60 |
| Brightest Pixel (single exposure) (at 2691.20 Å) | 0.053 | 6.44 | |
| Count rate entire detector | 2,177.728 | ||
| Buffer Time (sec) | 918.39 | ||
| 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. | |||
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| Global Count Rates | |||
| Source only | 80.284 | 9,716.174 | |
| Background (sky+dark) | 2,097.444 | 253,839.28 | |
| Encircled energy fraction | 0.86 | ||
| Instrument name: | STIS |
| Mode: | spectroscopic |
| Detector: | NUVMAMA |
| Central Wavelength: | |
| Grating: | [G230L] R ~ 500 |
| Aperture: | 52X0.05 |
| Target: [point source] | |
| Spectrum: | Black body at 10000.0K |
| Extinction E(B-V): | Milky Way Diffuse (Rv=3.1) = 0.04 applied after normalization |
| Normalization: | Renormalized to vegamag = 16.0 in filter WFC3/UVIS1/F218W |
| Redshift: | None |
| Emission Lines: | None |
| Selected background: | |
| Sky Background: | |
| Level: |
Table of Source and Noise Counts per Pixel
These results were computed using: ETC version 27.2
