ETC Request ID: STIS.sp.827851
Requested Signal/Noise Ratio = 25.000 at wavelength 1250.00 Å (per resolution element)
gives: Time = 3,714.6717 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 pix) | (2.0 pix resel x pix) | |
| Source | 0.104 | 775.36 | 27.85 |
| Background | 0.001 | 7.80 | 2.79 |
| Sky | 1.822e-14 | 1.35e-10 | 1.16e-05 |
| Dark Current | 0.001 | 7.80 | 2.79 |
| Total in selected region | 0.105 | 783.16 | 31.01 |
| Brightest Pixel (single exposure) (at 1279.93 Å) | 0.038 | 142.48 | |
| Count rate entire detector | 5,202.566 | ||
| Buffer Time (sec) | 384.43 | ||
| 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. | |||
|
|
|||
| Global Count Rates | |||
| Source only | 2,772.190 | 10,297,774.343 | |
| Background (sky+dark) | 157.359 | 584,536.06 | |
| Encircled energy fraction | 0.90 | ||
| Instrument name: | STIS |
| Mode: | spectroscopic |
| Detector: | FUVMAMA |
| Central Wavelength: | 1234 |
| Grating: | [E140H] R ~ 114000 |
| Aperture: | 0.2X0.09 |
| Glow region: | low |
| Target: [point source] | |
| Spectrum: | Bruzual Synthetic Stellar Spectra O7 V |
| Extinction E(B-V): | None |
| Normalization: | Flux 2.6e-12 flam at 1250.0 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
