ETC Request ID: STIS.sp.1364498
Exposure time (seconds) = 900.0000 at wavelength 1400.00 Å
gives: SNR = 6.9360 (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 | 0.028 | 49.93 | 7.07 |
| Background | 0.001 | 1.89 | 1.37 |
| Sky | 2.452e-11 | 4.41e-08 | 2.10e-04 |
| Dark Current | 0.001 | 1.89 | 1.37 |
| Total in selected region | 0.029 | 51.82 | 7.20 |
| Brightest Pixel (single exposure) (at 1239.90 Å) | 0.019 | 16.67 | |
| Count rate entire detector | 1,311.311 | ||
| Buffer Time (sec) | 1,525.19 | ||
| 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 | 25.414 | 22,872.685 | |
| Background (sky+dark) | 1,285.897 | 1,157,307.10 | |
| Encircled energy fraction | 0.82 | ||
| Instrument name: | STIS |
| Mode: | spectroscopic |
| Detector: | FUVMAMA |
| Central Wavelength: | |
| Grating: | [G140L] R ~ 1000 |
| Aperture: | 52X2 |
| Glow region: | low |
| Target: [point source] | |
| Spectrum: | Kurucz Models O5V 44500 5.0 |
| Extinction E(B-V): | Milky Way Diffuse (Rv=3.1) = 0.659 applied before normalization |
| Normalization: | Renormalized to abmag = 19.273 in filter Galex/NUV |
| 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
