June 2011: Another try on galaxies, … and the QSI against M13!

I keep on working (hard!) on improving the guidind and also the post-processing. To trhis, galaxies pose a great challenge to me. So, I tried on M101, and here is the result. Not so bad, although I should have got more signal! And the gradient problem is still there (until I take flats!), and oblige me to apply some severe corrections with PixInsight, which, I’m sure, spoil somehow the whole thing.

LRGB, with 4 600-second, binned 2X2, L frames, and 3 600-second, binned 3X3, throu RGB filters. Imaged with the QSI583WSG, guided with the DSI.

Go to this object description and this image technical detail.

Well, I thought it was time to test the QSI with a “big” one. I considered that my guiding techniques had improved enough to try. M13 is ALWAYS spectacular. Although it’s a bright and “easy” target, I find it challenging to properly image: smothly resolving the outskirts of it it’s something which is not simple.

RGB, with 180-second, binned 2X2, frames: 10XR, 8XG and 9XB. Imaged with the QSI583WSG, guided with the DSI.

 Go to this object description and this image technical detail.

June 2011: Supernova SN2011dh in M51!

On June 3, astronomers discovered a brilliant supernova in M51. This is the kind of spectacular target to image, due to M51 extraordinary beauty. I must admit that I didn’t know about the supernova existence when I imaged M51 by routine. When I processed the images, I compared them with professional pictures, to identify some of the features of the galaxy. I was stuck when I “discovered” a new star, around magnitude 13. I run to my computer and connected to the internet! Yes! Got it!

This image is an LRGB one. As I was testing, unaware of the supernova, it only contains 2 ten-minute subs through each filter, so the result is noisy, despite the 80-minute total exposure, and has some disturbing gradients (well, it’s time for me to begin taking flats!). Imaged with the QSI583WSG, guided with the DSI.

Go to this object description and this image technical detail.