ETC Request ID: STIS.sp.820077
Exposure time (seconds) = 1,000.0000 at wavelength 2500.00 Å
gives: SNR = 26.8434 (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 pix) | (2.0 pix resel x pix) | |
| Source | 0.370 | 741.00 | 27.22 |
| Background | 0.011 | 21.00 | 4.58 |
| Sky | 1.728e-06 | 3.46e-03 | 0.06 |
| Dark Current | 0.011 | 21.00 | 4.58 |
| Total in selected region | 0.381 | 762.00 | 27.60 |
| Brightest Pixel (single exposure) (at 2646.40 Å) | 0.153 | 152.81 | |
| Count rate entire detector | 1,861.526 | ||
| Buffer Time (sec) | 1,074.39 | ||
| 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 | 284.340 | 284,339.597 | |
| Background (sky+dark) | 1,577.187 | 1,577,186.74 | |
| Encircled energy fraction | 0.86 | ||
| Instrument name: | STIS |
| Mode: | spectroscopic |
| Detector: | NUVMAMA |
| Central Wavelength: | |
| Grating: | [G230L] R ~ 500 |
| Aperture: | 52X0.5 |
| Target: [point source] | |
| Spectrum: | Castelli-Kurucz Models B3V 19000 4.0 |
| Extinction E(B-V): | Milky Way Diffuse (Rv=3.1) = 0.12 applied before normalization |
| Normalization: | Flux 4e-15 flam at 2000.0 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 24.2
