Illustration of the speckle noise attenuation process achieved by ADI
Illustration of the speckle noise attenuation process achieved by ADI. Panel (a) shows a typical image after subtraction of an azimuthally symmetric median intensity profile; panels (b) and (c) both show, with a different intensity scale, the same image after ADI subtraction; and panel (d) shows the combination of 117 such speckle-subtracted images. The faint point source visible in panel (d) at (2.43", 7.3º) is 1 million times fainter than the star.
Credit:International Gemini Observatory/NOIRLab/NSF/AURA
About the Image
Id: | geminiann07017c |
Type: | Collage |
Release date: | Oct. 8, 2007, 6:57 p.m. |
Related announcements: | geminiann07017 |
Size: | 460 x 461 px |
About the Object
Name: | HD 691 |
Category: | Illustrations |