California Nebula

[CELESCOPE]

Another small section of the California nebula, taken with the Gps 8 and Fast Star System , HA filter used, processed in Maxim .

Rog

[OXO]

WOW :shock: you captured some detail there Rog :shock:

Excellent

James

[Ant]

Hey rog, just out of interest what your estimate of the faintest star recoreded in that image? got to be pretty low I would think.

Ant

[Astroman]

I did a check against the USNO Blue plates. Rog's faintest stars are ~16.8. Very good! Excellent even!

[CELESCOPE]

Thanks for that Astroman, i never got around to that as yet,

Cheers

Rog

[Ant]

Blimey thats faint! Well done Rog!

Astroman, would you have a link to the Blue Plates - could be a usefull resource to have!

Ant

[Astroman]

Rog: No problem. When someone asks, it's a reflex reaction to find out. It's a sickness, really. :?

Ant: The blue plates reference is really just a table of photometric data. I plug it into a program that's centered on a star field and it plots the stars and I have to click on them to find their magnitudes. The program is freeware called Cartes du Ciel and has been mentioned before in another thread. You can also check the red plates, do a subtraction and get some limited color info for stars down to ~Mv=20. It's a fantastic program that I use all the time.

[daz]

You can get it here

[Astroman]

Excellent. Thanks Daz.

[daz]

This is one of those things that I installed, but have never actually got round to using or playing with....

[Astroman]

It's not the fastest program, and the interface is a bit cumbersome, but it works well.

[Grant]

Having another play with this colourisation technique: