Eta Carina Ha with a strange line through it????

[batema]

Hi,

I took 10 x 3 min shots with W/O Flt 110 using Badder Ha 7nm and got this line through it. I have no idea what it is but if you could let me know and how to fix it that would be great.

Thanks

Mark

[Hagar]

What camera are you using? If it is a QHY9 you will need to turn clamping on in the ascom driver panel and that should fix it.

[Jaybee]

Don't know what the line is as I have just started to dabble in Astrophotography, but you could use paintshop or Photoshop to repair the image that you have, use the clone feature.

[batema]

Doug, I am using a QHY-9 so I'll have a look for what you said but I don't actually know what the ascom drivers are. I'm using Ezycap which is the program disc that came with it. Do you know what this line is?

Mark

[troypiggo]

Could this be "blooming"?

[Gama]

Hi Mark, this is because the shutter didnt close when downloading the image.
Could you make sure the shutter is moving, as maybe when you put the lid back on (Cleaning), the shutter may be stuck. Remember the machined hole must line up over the stepper motor shaft.
The shutter should be loose when you move the camera about.

Theo.

[gregbradley]

I have seen a similar thing in the past with SBIG STL11 cameras.
That line is a bit fatter than what I have seen so maybe not the same thing.

What it was with the STL (its really the chip not the camera)
is that some types of Kodak chips read the pixels one row at a time.
So a hot pixel can appear to be dragged down the image forming a brightish line and starting at some point in the image where the hot pixel is.

In this case it appears to be that bright star so again this may be something else other than a hot pixel being dragged down the line during the readout process.

Those lines are annoying as even though they are supposed to disappear with darks and bias etc I found they often reappeared later in the processing of images requiring Photoshopping.

If it is a hot pixel it will do it routinely over and over and not just a once off situation so there's your clue.

Greg.

[David Fitz-Henr]

I would say that it is not blooming, as the usual apearance is of bright (saturated) vertical lines. Apart from the one obvious line I can see a few other faint lines (also emanating from stars) that all go to the top of the frame. I'm not familiar with the mechanics of the QHY-9 but it sounds like Theo has a good theory to check out.