ETC Request ID: STIS.sp.996459
Exposure time (seconds) = 100.0000 at wavelength 2000.00 Å
gives: SNR = 7.3685 (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 | 0.282 | 56.32 | 7.50 |
| Background | 0.011 | 2.10 | 1.45 |
| Sky | 5.625e-08 | 1.13e-05 | 3.35e-03 |
| Dark Current | 0.011 | 2.10 | 1.45 |
| Total in selected region | 0.292 | 58.42 | 7.64 |
| Brightest Pixel (single exposure) (at 2449.60 Å) | 0.172 | 17.21 | |
| Count rate entire detector | 1,908.938 | ||
| Buffer Time (sec) | 1,047.70 | ||
| 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. | |||
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| Global Count Rates | |||
| Source only | 334.355 | 33,435.473 | |
| Background (sky+dark) | 1,574.584 | 157,458.36 | |
| Encircled energy fraction | 0.84 | ||
| Instrument name: | STIS |
| Mode: | spectroscopic |
| Detector: | NUVMAMA |
| Central Wavelength: | |
| Grating: | [G230L] R ~ 500 |
| Aperture: | 52X0.2 |
| Target: [point source] | |
| Spectrum: | Power Law with index -2.3 |
| Extinction E(B-V): | Milky Way Diffuse (Rv=3.1) = 0.02 applied before normalization |
| Normalization: | Flux 6e-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 25.1.1
