6 replies to this topic

[Eyeroll1952]

Captured an image of NGC5905 and surrounding area over the past couple of nights and noted the blue jets emanating from HD135501. These don't appear to be an imaging artifact but the relatively few images I have seen online don't show these features. Would appreciate help educating me on what these are. I have seen references to astrophysical jets and stellar jets so perhaps that is it. There is also a second weaker instantiation of this phenomenon of the extreme right side but with different jet angle and color. 

 

Thanks!

 

Paul

 

 

 

Attached Thumbnails

• 
• 

[Sheremy01]

I would say it’s diffraction spikes from wires in front of your scope. I use hyper star and get similar effects from the cords running from my camera.

[Michael Covington]

I think it's an optical artifact.  I don't see the jets in any of several good images on Aladin.  Could there have been anything (even a single spiderweb) across the front of your objective?

[Eyeroll1952]

My first thought was also that this was some artifact, but if it were some wirelike diffractive item it shouldn't just show up on one image object... I am more inclined to think this is a Nobel Prize worthy discovery

[BKMaynard]

Looks like a partial obstruction of your scope. I see this when the shutter opening in my dome isn’t directly in front of the scope. It shows prominently on bright stars.

[Eyeroll1952]

Dang, no Nobel Prize this year either. What threw me off was the "jets" only showing up on one star. Then I went back and looked at individual subs and can see faint traces on many of the brighter stars on some subs. I suspect that too heavy processing, perhaps going crazy with Croman tools, wiped out all the traces except on the brightest star. I am inclined to think that BKMaynard's hunch is correct  that it might be diffraction off a dome aperture edge. Need to check alignment as this has never happened to date. 

 

Sorry if I wasted people's time instead of doing more homework before posting. I least I got a pretty picture out of it...

 

Paul

[DaveDE]

I can see it now - Next up from Croman tools: DiffractionSpikeXterminator !