ETC Request ID: STIS.sp.820956
Exposure time (seconds) = 2,453.0000 at wavelength 1300.00 Å
gives: SNR = 66.3740 (per resolution element)
Exposure time calculation HAD WARNINGS.
WARNING MESSAGE: Buffer time 52.5181 is less than minimum 99 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 | 1.127 | 5,529.53 | 74.36 |
| Background | 0.001 | 5.15 | 2.27 |
| Sky | 8.434e-15 | 4.14e-11 | 6.43e-06 |
| Dark Current | 0.001 | 5.15 | 2.27 |
| Total in selected region | 1.128 | 5,534.69 | 83.31 |
| Brightest Pixel (single exposure) (at 1297.42 Å) | 0.395 | 969.08 | |
| Count rate entire detector | 38,082.115 | ||
| Buffer Time (sec) | 52.52 | ||
| 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 | 22,846.195 | 56,041,716.214 | |
| Background (sky+dark) | 157.420 | 386,152.00 | |
| Encircled energy fraction | 0.93 | ||
| Instrument name: | STIS |
| Mode: | spectroscopic |
| Detector: | FUVMAMA |
| Central Wavelength: | 1425 |
| Grating: | [E140M] R ~ 45800 |
| Aperture: | 0.2X0.2 |
| Glow region: | low |
| Target: [point source] | |
| Spectrum: | Black body at 47250.0K |
| Extinction E(B-V): | None |
| Normalization: | Flux 7.5e-12 flam at 1300.0 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
