3 ms·
What are all the horizontal bands?
by DavidSJ 6y ago
What are all the horizontal bands?
- dvh 6y agoCCD artefact. In CCD charge from one pixel is carried to the edge of the chip to be read, when the signal is too strong it bleeds into neighboring pixels. This is how CCD works: https://upload.wikimedia.org/wikipedia/commons/thumb/6/66/CCD_charge_transfer_animation.gif/250px-CCD_charge_transfer_animation.gif https://upload.wikimedia.org/wikipedia/commons/thumb/6/66/CC...
- SiempreViernes 6y agoBig diffraction spikes for oversaturated stars.
- SiempreViernes 6y agoHere's an example where you get to see lots of the optics in the telescope along with the sky: https://viewer.legacysurvey.org/?ra=165.4455&dec=56.3941&layer=ls-dr9&zoom=11 https://viewer.legacysurvey.org/?ra=165.4455&dec=56.3941&lay...
- sega_sai 6y agoDiffraction spikes are different from saturation trails. The saturation goes preferentially along CCD columns/rows, while diffraction spikes are oriented like the support of the secondary mirror.