ETC Request ID: STIS.sp.1366688
Exposure time (seconds) = 2,500.0000 at wavelength 2200.00 Å
gives: SNR = 23.1483 (per resolution element)
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 | 0.120 | 598.52 | 24.46 |
| Background | 0.014 | 70.00 | 8.37 |
| Sky | 5.442e-07 | 2.72e-03 | 0.05 |
| Dark Current | 0.014 | 70.00 | 8.37 |
| Total in selected region | 0.134 | 668.52 | 25.86 |
| Brightest Pixel (single exposure) (at 2755.20 Å) | 0.152 | 379.40 | |
| Count rate entire detector | 2,320.012 | ||
| Buffer Time (sec) | 862.06 | ||
| 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 | 221.142 | 552,854.334 | |
| Background (sky+dark) | 2,098.870 | 5,247,175.01 | |
| Encircled energy fraction | 0.85 | ||
| Instrument name: | STIS |
| Mode: | spectroscopic |
| Detector: | NUVMAMA |
| Central Wavelength: | |
| Grating: | [G230L] R ~ 500 |
| Aperture: | 52X0.2 |
| Target: [point source] | |
| Spectrum: | Power Law with index 0.0 |
| Extinction E(B-V): | Milky Way Diffuse (Rv=3.1) = 0.25 applied before normalization |
| Normalization: | Flux 2e-15 flam at 1928.0 Å |
| 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
