Celestial hemisphere:  Northern  ·  Constellation: Cassiopeia (Cas)  ·  Contains:  25 Cas  ·  HD3950  ·  HD4536  ·  HD4615  ·  HD4636  ·  LBN 603  ·  LBN 608  ·  LBN 609  ·  LDN 1295  ·  LDN 1296  ·  PGC 137084  ·  PGC 137099  ·  PGC 137101  ·  PGC 137134  ·  PGC 137186  ·  PGC 137195  ·  PGC 2384561  ·  PGC 2384611  ·  PGC 2385148  ·  PGC 2385452  ·  PGC 2385726  ·  PGC 2386443  ·  PGC 2386695  ·  PGC 2387494  ·  PGC 2389049  ·  PGC 2389160  ·  PGC 2389404  ·  PGC 2389496  ·  PGC 2389512  ·  PGC 2389738  ·  And 33 more.
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Nu Cas (25 Cas) and LBN 603, Alan Brunelle
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Nu Cas (25 Cas) and LBN 603

Revision title: Fixed stars with BXT. No BXT DeConvolution

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Nu Cas (25 Cas) and LBN 603, Alan Brunelle
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Nu Cas (25 Cas) and LBN 603

Revision title: Fixed stars with BXT. No BXT DeConvolution

Equipment

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Acquisition details

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Description

Revision:
The second in the line of images I have reprocessed. Emphasis is to improve small- and medium-scale noise, stars, and also raise the brightness (dynamic range), contrast and detail in this image. All the same subs were used. I chose more wisely settings and some of the new functions in the new WBPP script. Also employing the Noise and Star Xterminators along with Bill Blanshan's star reduction Pixel Math functions helped greatly in my processing of this image. These scripts are helping to make a good number of the rather cryptic processes in PI obsolete. They also make reprocessing these images much more time efficient and will allow me to work back into my not-so-big catalog and improve the images. I am finding things I never could see very well with my first round of processing on some of these images.  Also, new revision used BXT (on the previous fully processed image to fix stars only.  It worked!).

Original Description:
LBN 603 reminds me of low scudding clouds racing across a windy dark clear sky just after a storm has passed on the ocean.  Only these clouds don't move and they are likely a thousand (if not more) light years from us.  However, they do reside in a fairly clear "sky" as these are on the remote edge, significantly removed from the billowing clouds found in the central spine of the Milky Way.  It is basically the last significant whiff of dust when traveling (by eye) a straight line from NGC 281 (Pacman) to M31 (Andromeda Galaxy). 

This is not so dense as to support much in the way of star-formation.  In fact I missed the one reflection nebula within this complex, which is a off frame, a bit to the left of nu CEP had I access to a larger sensor.  I like the mix of IFN-like signal and darker browns in the few dense regions.  There is nothing resembling any excited gas emissions here.  I did not process this in dramatic fashion, partly because I did not get a lot of time on this, but also, this small grouping of clouds is hardly outstanding in Aladin under any visible presentation.  

With the QHY268C and this type of target, I used Readout Mode 1 in high gain setting of 60, which offers the very lowest readout noise for this camera.  It also coincides with the maximum dynamic range, though at a much reduced full well capacity.  Because of nu CAS, which I actually wanted to keep in frame, I dropped my sub length to 45 seconds.  Normally I use these settings with 90 seconds.  But nu CAS was saturated even at 45 seconds.  But I am happy that the halo is not the most intense that I have run into.  I tried to use StarHaleReducer and once again it was buggy.  When it starts to work again, I will come back and knock it down a bit.  I need more time for this object.  It was not the primary target these couple of nights, but filled time for me while I awaited the desired targets further east to come into better position.  I did a lot of star reduction to enhance the cloud structures.  But I also include a raw Starnet version of the primary image if anyone is interested in the finer, fainter strands of clouds.

Comments

Revisions

  • Nu Cas (25 Cas) and LBN 603, Alan Brunelle
    Original
  • Nu Cas (25 Cas) and LBN 603, Alan Brunelle
    C
  • Nu Cas (25 Cas) and LBN 603, Alan Brunelle
    D
  • Nu Cas (25 Cas) and LBN 603, Alan Brunelle
    E
  • Final
    Nu Cas (25 Cas) and LBN 603, Alan Brunelle
    F

C

Title: Nu Cas Starless version

Description: Replaced the old starless version with a new one. Slightly better done with the new StarXTerminator. No additional work done to improve the image

Uploaded: ...

D

Title: Starless Version of Nu CAS (25 CAS) and LBN 603 Revision

Description: A starless rendition of the reprocessed version of this dark nebula. See the source image Description for details

Uploaded: ...

E

Title: Nu Cas (25 Cas) and LBN 603, Reprocessed

Description: See Revision under Description.

Uploaded: ...

F

Title: Fixed stars with BXT. No BXT DeConvolution

Uploaded: ...

Sky plot

Sky plot

Histogram

Nu Cas (25 Cas) and LBN 603, Alan Brunelle