Young open clusters in the Galactic star forming region NGC 6357

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Table 5

Main parameters of the core of Pismis 24 (Pis24 core).

Designation	Approx. peak position						Peak	Number
	RA(2000)			Dec(2000)			surface density^a	of cluster members^b
	(h)	(m)	(s)	(°)	(′)	(′′)	(stars pc^-2)

Core NE	17	24	45.0	− 34	11	24	565	34 ± 9
Core C	17	24	43.4	− 34	12	00	565	116 ± 19
Core SW	17	24	41.3	− 34	12	17	835	56 ± 12
Core (global)								290 ± 24

Notes.

^(a)

The average field star surface density of ~180 stars/arcmin² has been subtracted;

^(b)

the global number is derived inside the 2σ contour from the background, whereas a higher contour is used for the subclusters.

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