Roboscopes June 23 Imaging Competition - NGC7000 Widefield

as far as I see, there is no data right now?

Pete will have it checked over this weekend then it will be put into the folder :)

Isn't the second Antlia filter actually SII/HB? I am really curious about the performance of this filter.

Thank you,

Daniel

Here is my interpretation of the data. I have used all bands fromt he HaOiii and SiiHb filters and integrated as SHaOHb. I used the OSC data for stars.

The filters are great, yet some blue halos form around bright stars, especially with the SiiHb filter, which were are challenging to process in this case. Anyhow, the filters perform very well on such targets.

Also, I found out that by using SHaOHb, I could bring out a small nebula that has no name yet in SIMBAD, as far as I could see (see second image).

Cheers

Manuel

Is it normal that I can't see the data yet? I still only see the M81 data in the folder.

CS

Darius

I can´t see the data too - so it´s a little bit strange that manuelcp can see it. 

Actually I found the data in another folder to which I have access... Phil will be moving it to where it actually belongs as soon as he can.

Apologies for the confusion, I had not paid attention...

CS
Manuel

Hi all,

The competition data is now in the folder ready for you to use :)

I just downloaded the latest "flats" for P11 but there is no filter information in the fits header. Where flats taken for the two new filters?

Thank you,

Daniel

I should have hit refresh, found the flats.

Daniel

Now that my brain is working and I found the new P11 flats, I am curious what is the difference between the RGB flats and the OSC flats, is there an actual different filter used or is this just a different label for the filter wheel?

Evening

The wheels fitted with:

• OSC = No filter standard colour imaging
• RGB Filter = Standard colour with enhanced Narrowband response
• HA OIII Filter = Dual Narrowband
• HB SII Filter = Dual Narrowband

I hope that helps

Steve

I triple checked my dylexia and the P11 darks folder has P10 and attached an image of what I am seeing.

I triple checked my dylexia and the P11 darks folder has P10 and attached an image of what I am seeing.

Hello Daniel,

I assume that this is just an error in the naming of the files. I have calibrated the competition data with these darks and it worked fine for me. Also, the darks have a resolution of 6000 x 4000 pixels. That speaks for the P11 camera. The P10 camera has a resolution of 9000 x 6000 pixels according to the info on the website.

CS
Darius

loving the detail from these data

especially the filter - Ha/HB  is this correctly labelled?  The intensity of HB looks to be proportional to that of Ha from the HA/Oiii filter - so i am assuming that it is H Beta

The red channel of the Ha/HB is not the same as red from Ha/Oiii - so is it actually representing the Sii ?

loving the detail from these data

 

especially the filter - Ha/HB  is this correctly labelled?  The intensity of HB looks to be proportional to that of Ha from the HA/Oiii filter - so i am assuming that it is H Beta

The red channel of the Ha/HB is not the same as red from Ha/Oiii - so is it actually representing the Sii ?

 

The wheels fitted with:

• OSC = No filter standard colour imaging
• RGB Filter = Standard colour with enhanced Narrowband response
• HA OIII Filter = Dual Narrowband
• HB SII Filter = Dual Narrowband

I hope that helps

Steve

Another month, another fascinating and challenging dataset! For me the biggest question was what to do with the Sii-Hb data - to be honest I had never heard of an H-beta filter until this month's competition was announced :)

In the end I mixed up a cocktail of the narrowband layers that I felt showed some data from each of the 4 gases, and then blended a starless version of this layer with the OSC data. Note: I ran StarXterminator on the narrowband data while still in linear form, and that seemed to deal with any halo issues.

I was grateful for Manuel's image to use as a reference. It showed just how much detail was on offer and inspired me to push the data a lot further than I normally would have, resulting in a far improved image over what my standard processing method was producing. Always something new to learn in this game :)

This month I find the competition particularly exciting. There are several ways to process and combine the data. The first results of the participants confirm this. Each image looks completely different from the other images in terms of colors. So you can see what is possible with the data.

I decided to use a classic Hubble palette for the processing. For this I did a ChannelExtractin in Pixinsight on the Ha-Oiii and Ha-Hb data. Then combined again as a Hubble palette. For this I used the following data:

Ha-HB-Red = Sii
Ha-Oiii-Red = Ha
Ha-Oiii-Blue = Oiii

I had a lot of fun with the contest again this month and am already looking forward to the next contest. I would also like to thank the Roboscopes team for making these competitions possible.

CS
Darius

What fab data - I have gone a little more traditional....

for the nebulosity:

I have used the Sii, Oiii, 75% of H alpha and 25% of H beta to produce a hubble palette view, then when i processed the RGB data I saw that that had a little more tonal variation than I had expected, so I mixed the RGB nebulosity frame with the hubble (75% hubble, 25% RGB)

Then RGB stars

That was fun!  Thanks All

does help if I get the upload to work!

What fab data - I have gone a little more traditional....

for the nebulosity:

I have used the Sii, Oiii, 75% of H alpha and 25% of H beta to produce a hubble palette view, then when i processed the RGB data I saw that that had a little more tonal variation than I had expected, so I mixed the RGB nebulosity frame with the hubble (75% hubble, 25% RGB)

Then RGB stars

That was fun!  Thanks All