NGC 1914 ("Labyrinth") nebula in HOS colors by Zaytsev and Hanson (Alexandr Zaytsev)

NGC 1914 ("Labyrinth") nebula in HOS colors by Zaytsev and Hanson

Link: https://www.hansonastronomy.com/ngc-1914

A rarely looked upon compact (3’ x 4’) NGC 1914 nebula with embedded star association [1] located near the Large Magellanic Cloud (LMC) with an elaborate and complex internal structure. The nebula appears to have two dim diffuse arms extending asymmetrically up to 10’ from the center. A small circular structure of about 11’’ in diameter is also visible at about 3.5’ distance from the center of NGC 1914 on the top right side, which could be an unrelated (more distant?) planetary nebula.

The “Labyrinth” name is proposed due to the seahorse shape dark nebula revealed on the inside. Only its brightest core feature (which is about 1.5’ across) is identified in DSS2 and other surveys [2, 3], missing the details on the periphery. The way how this object may be connected with other diffuse objects found nearby [4] is to be studied further.

Data and initial calibration/integration: Alexandr Zaytsev https://www.astrobin.com/users/m57ring/

ASA Ritchey-Chretien RC-1000: D=1m, f/6.8 on alt-azimuthal direct drive fork mount, FLI ProLine 16803 with secondary mirror based motorized focusing and automatic de-rotation (Telescope #1 system of ChileScope observatory, Río Hurtado Valley, Chile).

13x Ha + 13x OIII + 13x SII guided 1200 sec exposures (13h of combined integral) collected over 9 imaging sessions carried out on Oct 2, 3 of 2022, Nov 16, 2022, and Feb 12 ,13, 14, 16, 17, 19 of 2023 using Chilescope Telescope #1 system.

Image Processing: Mark Hanson http://www.hansonastronomy.com

Enjoy, Mark and Alex.

[1] https://simbad.u-strasbg.fr/simbad/sim-id?Ident=NGC%201914

[2] https://theskylive.com/sky/deepsky/ngc1914-object

[3] https://aladin.cds.unistra.fr/AladinLite/?-c=16+41+20.4149-48+45+46.644&ident=CCDM+J16413-4846AB&submit=Aladin+previewer

[4] https://www.astrobin.com/b6zxbk/

Links to the resources referred to by image revisions E-H:

[5] https://arxiv.org/abs/astro-ph/0606356

[6] https://arxiv.org/ftp/astro-ph/papers/0606/0606356.pdf

[7] https://irsa.ipac.caltech.edu/data/SPITZER/docs/irac/

[8] https://irsa.ipac.caltech.edu/data/SPITZER/docs/irac/iracinstrumenthandbook/6/

[9] https://www.spitzer.caltech.edu/image/ssc2006-17b1-large-magellanic-cloud-in-the-infrared

[10] https://sha.ipac.caltech.edu/applications/Spitzer/SHA/

B

Title: Zoom over the main object in the scene with one of its "arms" extending towards the top left corner

Uploaded: ...

C

Title: Wider angle view to the scene with partial star suppression applied

Description: There is a hint of a second "arm" extending towards the right bottom corner of the frame.

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D

Title: Wider angle view to the scene with full star suppression applied

Description: This starless view is revealing the circular structure (best visible in the Ha channel) on the top right side of the main object (at about 3.5' distance from the center) - possibly an unrelated more distant nebula.

Uploaded: ...

E

Title: Mapping the scene onto the Spitzer IRAC4 survey data [5-10], reveling the extended structure of the nebula

Description: Links to resources are given under the original image revision description. The T1 image overlay is set to be nearly transparent here to show the structures visible in IR.

Uploaded: ...

F

Title: Mapping the scene onto the Spitzer IRAC4 survey data [5-10], reveling the extended structure of the nebula

Description: Links to resources are given under the original image revision description. The balance between T1 image overlay and the background image is set to 50/50 here. The extended arm in the upper left side of the nebula visible in T1 image overlay is matching closely the structures visible in IR.

Uploaded: ...

G

Title: Mapping the scene onto the Spitzer IRAC4 survey data [5-10], reveling the extended structure of the nebula

Description: Links to resources are given under the original image revision description. The balance between T1 image overlay and the background image is shifted 80% to the T1 overlay here. The structure on the lower right from the nebula visible in IR is matching the hints of background structure visible in the same area of the T1 image.

Uploaded: ...

H

Title: T1 overlay image without IR image on the background - for matching with image revisions E-G

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K

Title: Mapping the scene onto the Spitzer IRAC[1-4] surveys data [5-10] using IRAC[4, 1, 2, 3] to LRGB color mapping

Description: Links to resources are given under the original image revision description. The T1 image overlay is set to a specific transparency here to mix the features of the T1 image and features revealed in IR data, without loosing details in both.

Uploaded: ...

L

Title: Spitzer IRAC[1-4] surveys based background image without T1 overlay image - for matching with image revision K

Uploaded: ...

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Status	Advanced success
Started	...
Astrometry.net job	7975957
PixInsight job	I0J6YDCT8GKR5ZPZWB8ZHM04UNA11XW4
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	05h17m45s.768
RA (top/left)	05h19m35s.188
RA (top/right)	05h16m58s.546
RA (bottom/right)	05h15m56s.399
RA (bottom/left)	05h18m32s.460

Dec (center)	-71°15′09″.96
Dec (top/left)	-71°18′52″.78
Dec (top/right)	-71°23′56″.64
Dec (bottom/right)	-71°11′21″.86
Dec (bottom/left)	-71°06′22″.51

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