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View Full Version here: : NGC 6553 - Globular Cluster & Gravitational Lensing


jsmoraes
13-10-2015, 04:28 AM
Constelation of Sagitarius, distant from 19,000 light years. ESO discovered a microlensing by a black hole with a mass twice of the Sun. Maybe it lies inside the cluster. It brings out an amplified image of a red giant star of the background object.

I didn't understand who the ESO's arrow is pointing exactly: the stars near its tip or the red star near and on its direction.

http://www.eso.org/public/images/potw1540a/
http://www.eso.org/public/archives/releases/sciencepapers/potw1540/potw1540a.pdf

GSO 305 mm - Canon T3 - 24 x 2 min (48 min) - OAG - Skyglow filter - Coma corrector

http://www.astrobin.com/218916/

Some images are larger than 200 Kb, therefore only by link:
http://jsmastronomy.30143.n7.nabble.com/NGC-6553-Globular-Cluster-td480.html

jsmoraes
13-10-2015, 10:33 AM
Reading the PDF file from ESO I have solution for my doubt about the who is the target of the arrow. I did correction of my images in my site.

And the image of this microlens by ESO: http://astronomia-e-astrofotos.1069742.n5.nabble.com/file/n2091/ESOngc6553Lens.jpg