NGC 1818 - A trip INSIDE LMC - Awe ! Aweful ! Amazing !

[jsmoraes (Jorge)]

The image has many noise, I know. It is intentional. I can't destroy data from faint clusters.

For travel inside LMC you must see the photo in full resolution mode in Astrobin, with 4290 x 2856 pixel - 1.6 Mbytes.

Forget the noise and search for all cluster and structures. The LMC wake up recently (ok, some millions year ago - nothing in astronomy). It has many areas with intense stars formation.

This galaxy is a mystery. Unknown, yet. A fossil of the early days of the formation of the Universe that was kindled by the gravity of the Milky Way.

Amazing and aweful !

http://www.astrobin.com/151689/0/


I am working in crop areas of this region. I found 9 areas with clusters. When they are ready I will post here. I must work with much attention to don't destroy datas.

If any one want try to process better the image I can dispose the original CR2 files or Autosave.tif 32 bits from DSS or the HDR convertion in Photoshop of Autosave.tif - 16 bits.

Sorry by the frustation because of noise and lack of quallity. I work with a stock T3 Canon.

note: I found some alone very red stars. They seems to be near the final life. Future Planetary Nebulas ? ! ?


Only one photo is supported by IceInSpace due the file size, up to now. I used it in Astronometry.net to confirm the identification of known objects.

[Tony_ (Tony)]

G'day Jorge,

Lots of clusters in that image.
This is a good technique for noise reduction in photoshop without losing details too much:
https://www.youtube.com/watch?v=32Mj2Ia-tC0

I've attached a quick try - you can play around with the settings to do better.

Regards,
Tony.

[nebulosity. (Jo)]

Awesome stuff Jorge! Very impressive

Cheers
Jo

[andyc (Andy)]

Very nice Jorge - I'm impressed with your photos, and the clear skies that have allowed you to be so prolific, lots and lots of cloud here just now

[cometcatcher (Kevin)]

It's a zoo in there! Very nice Jorge.

[jsmoraes (Jorge)]

Thanks for comments. I failed for don't produce new dark files. It's summer here, with 30 - 35 degrees at night. The sensor is working with 35 - 40 degrees. My dark files are old and with medium temperature about 25 - 30 degrees.

Most noise is thermal noise. I need dark and bias with current temperature.

Good link, Tony. I do something similar. I create mask from background. Many masks. I never reduce noise only one time. I do it many times, at different stage of processing.

The tutorial has a good trick: use the the main image as mask to protect the details. It is more easy and fast. I spend much time creating masks. I will try to see if it produces better results than my current procedures.

The summer here is very favorable. Absolutely dry. Too much very dry ! No clouds, no winds, no rain, the grass in my garden is already fully dead, and very very hot. The atmosphere is clean. Very and very very low refraction.

The unique problem is the temperature of sensor: thermal noise. I will try reduce it with dark files.

note: with atmosphere very dry I haven't high level of humidity and so less refraction and skyglow. Better focus + dark sky = better image.

[Tony_ (Tony)]

G'day Jorge,

I really like that noise reduction technique - I also often do it more than once too. There are also some other good techniques by the same guy.

Going by the number of images you post - you must get a lot of clear skies. I'm lucky to get one semi-clear night per week (although this week has been a little better). Most of the time its been a case of hoping that the 6 hour or so gap in the clouds happens at night, preferably on moonless weekends.

If you can ever get a cooled camera, it really helps with noise reduction, especially since you live in a hot climate.

Regards,
Tony.