ETC Request ID: STIS.sp.181107
Exposure time (seconds) = 2,423.0000 at wavelength 2376.00 Å
gives: SNR = 16.9011 (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 | 0.078 | 375.88 | 19.39 |
| Background | 0.025 | 118.73 | 10.90 |
| Sky | 6.139e-07 | 2.98e-03 | 0.05 |
| Dark Current | 0.025 | 118.73 | 10.90 |
| Total in selected region | 0.102 | 494.61 | 22.24 |
| Brightest Pixel (single exposure) (at 2500.80 Å) | 0.038 | 91.20 | |
| Count rate entire detector | 3,733.396 | ||
| Buffer Time (sec) | |||
| 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 | 63.372 | 153,549.906 | |
| Background (sky+dark) | 3,670.024 | 8,892,467.71 | |
| Encircled energy fraction | 0.85 | ||
| Instrument name: | STIS |
| Mode: | spectroscopic |
| Detector: | NUVMAMA |
| Central Wavelength: | |
| Grating: | [G230L] R ~ 500 |
| Aperture: | 0.2X0.2 |
| Target: [point source] | |
| Spectrum: | Bruzual Synthetic Stellar Spectra O9.5 I |
| Extinction E(B-V): | Milky Way Diffuse (Rv=3.1) = 0.1 applied before normalization |
| Normalization: | Renormalized to Johnson V = 18.87 in magnitudes relative to Vega |
| 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 19.2
