Gum 48d HII region / RCW 80 SNR in Centaurus in Ha (Alexandr Zaytsev)

Gum 48d HII region / RCW 80 SNR in Centaurus in Ha

Link: https://coalsack.online/chilescope/Cen_2023Q1/Gum48d_T3_z2_10x600s_Ha_a3_at.jpg

1h 40min of integral Ha exposure of Gum 48d HII region / RCW 80 SNR [1-4] around HD 119796 (Supergiant HR 5171) star, also featuring NGC 5281, 5269 open star clusters - captured remotely using Telescope #3 (ASA-N D = 0.5m f/3.8, FLI ProLine 16803) system of ChileScope on Mar 28, 2023.

[1] http://galaxymap.org/cat/view/gum/48d

[2] https://arxiv.org/abs/0903.0934

[3] https://arxiv.org/pdf/0903.0934.pdf

[4] IR image of the area by Spitzer: http://galaxymap.org/mwe/mwe.php?centreLon=309.286432549505&centreLat=-0.44628618900526124&zoom=9&tile_set=mipsgal&show_markers=1

The original resolution image of revision B is available under [5]:

[5] https://coalsack.online/chilescope/Cen_2023Q1/Gum48d_T3_z2_10x600s_Ha_a3_stl_at.jpg

A wider FOV image of the central part of Cir-Cen starfield obtained with Chilescope T4 instrument is also available under [6]:

[6] https://www.astrobin.com/gcqtmj/

A narrower FOV image of the same object in Ha obtained with Chilescope T1 instrument is also available under [7]:

[7] https://www.astrobin.com/syestj/

Where Gum 48d HII region (which is clearly visible in Ha) ends and RCW 80 SNR (much dimmer structure closer to NGC 5281) begins is well illustrated in Fig. 2 taken out of [2, 3]:

The Gum 48d has a rather interesting feature - a compact dark cloud located close to the central (HD 119796) star:

Final
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Title: Version of the original image with partial star suppression applied

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C

Title: Version of the original image with an overlay of a narrower FOV image obtained with Chilescope T1 instrument later [7]

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Status	Advanced success
Started	...
Astrometry.net job	7499550
PixInsight job	FVOATT66ODAJNPO1OEWETBH8MW7KZI15
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	13h47m09s.214
RA (top/left)	13h51m45s.550
RA (top/right)	13h42m34s.142
RA (bottom/right)	13h42m23s.481
RA (bottom/left)	13h51m54s.557

Dec (center)	-62°35′13″.49
Dec (top/left)	-62°02′38″.77
Dec (top/right)	-62°02′34″.23
Dec (bottom/right)	-63°07′16″.13
Dec (bottom/left)	-63°07′18″.44

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Gum 48d HII region / RCW 80 SNR in Centaurus in Ha

Gum 48d HII region / RCW 80 SNR in Centaurus in Ha

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Gum 48d HII region / RCW 80 SNR in Centaurus in Ha

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