M92 (NGC 6341)

Telescope: Planewave 17" CDK reflector, 1940 mm FL
Camera: FLI-PL6303E, 3072 x 2048 pixels
Exposure: 9 x 3 minutes. Processed with PixInsight.
Location: Mayhill, New Mexico (Elevation 7380')
Image Center (J2000): RA 17h 17m 07s, Dec 43° 08' 19"

Bright globular cluster, apparent size in this image is about 10', central core diameter about 27". Minimally affected by field star contamination. Image intensity was reduced towards the image center to nearly resolve the cluster's dense core.
Raw data for this image can be downloaded.


M92 (NGC 6341), Bright globular cluster, apparent size in this image is about 10', central core diameter about 27". Minimally affected by field star contamination. Image intensity was reduced towards the image center to nearly resolve the cluster's dense core., acquired with a remote telescope at Mayhill, New Mexico (Elevation 7380')

Object Label Identifier Notes
Galaxy G1 GALEXASC J171745.36+430248.9 mB=19.6
Galaxy G2 GALEXASC J171734.94+425643.6 mB=19.8
Galaxy PGC 59984 PGC 59984 mB=15.3, 0.7' x 0.4', unclassified type
Quasar Q1 z=0.6 [VV2006] J171730.1+431940 mV=19.50, z=0.632
RR Lyrae variable 17 RR Lyrae variable stars were identified in 2001 (Kopacki, G. 2001, A&A, 369, 862). 10 are marked.

Click on the image to display the plate solved image with annotations. 4' across M92 is about 30 light years.


FITS files to create this image:

Luminance:

M92 Luminance

Image shown is Luminance 001.fits. Each file is 180 seconds, Planewave 17" reflector, 3072x2048 pixels, unbinned with Darks, Bias and Flats applied. Data acquired May 17, 2016 and May 2, 2017.


Luminance 001.fits
Luminance 002.fits
Luminance 003.fits
Luminance 004.fits
Luminance 005.fits
Luminance 006.fits
Luminance 007.fits
Luminance 008.fits
Luminance 009.fits
Luminance 010.fits


Files can be loaded into PixInsight directly from the PixInsight console. For example, in the PixInsight console enter:
    open "http://www.remote-astrophotography.com/M92/M92-Luminance-BIN1-010.fits"


PixInsight process icons to process this data set. Processes are listed in order of execution. Each process icon can be downloaded or opened directly in PixInsight using the PixInsight console, for example:
    open http://www.remote-astrophotography.com/M92/CosmeticCorrection.xpsm


1 CosmeticCorrection

Remove dead pixel columns and hot/cold pixels from each exposure. Enable AutoDetect and Defect List options. Use Luminance fits files from above.

2 StarAlignment

Register multiple exposures. Use cosmetic corrected files from step 1.

3 ImageIntegration

Stack multiple exposures. Use registered files from step 2. Enables high/low pixels clipped, high/low sigma pixels rejected.

4 DynamicCrop

Crop the integrated image from step 3 to remove stacking artifacts around image edges.

5 DynamicBackgroundExtraction

Gradient removal