2012A&A...542A..81M

Query : 2012A&A...542A..81M

2012A&A...542A..81M - Astronomy and Astrophysics, volume 542A81-81 (2012/6-1)

A multi-scale, multi-wavelength source extraction method: getsources.

MEN'SHCHIKOV A., ANDRE P., DIDELON P., MOTTE F., HENNEMANN M. and SCHNEIDER N.

Abstract (from CDS):

We present a multi-scale, multi-wavelength source extraction algorithm called getsources. Although it has been designed primarily for use in the far-infrared surveys of Galactic star-forming regions with Herschel, the method can be applied to many other astronomical images. Instead of the traditional approach of extracting sources in the observed images, the new method analyzes fine spatial decompositions of original images across a wide range of scales and across all wavebands. It cleans those single-scale images of noise and background, and constructs wavelength-independent single-scale detection images that preserve information in both spatial and wavelength dimensions. Sources are detected in the combined detection images by following the evolution of their segmentation masks across all spatial scales. Measurements of the source properties are done in the original background-subtracted images at each wavelength; the background is estimated by interpolation under the source footprints and overlapping sources are deblended in an iterative procedure. In addition to the main catalog of sources, various catalogs and images are produced that aid scientific exploitation of the extraction results. We illustrate the performance of getsources on Herschel images by extracting sources in sub-fields of the Aquila and Rosette star-forming regions. The source extraction code and validation images with a reference extraction catalog are freely available.

Abstract Copyright: ∼

Journal keyword(s): stars: formation - infrared: ISM - submillimeter: ISM - methods: data analysis - techniques: image processing - techniques: photometric

Simbad objects: 32

Full paper

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Number of rows : 32

N	Identifier	Otype	ICRS (J2000) RA	ICRS (J2000) DEC	Mag U	Mag B	Mag V	Mag R	Mag I	Sp type	#ref 1850 - 2026	#notes
1	NAME Polaris Cirrus Cloud	MoC	01 52 29.6	+87 40 31						~	80	0
2	W 3	MoC	02 27 04.10	+61 52 27.1						~	1064	3
3	* alf UMi	cC*	02 31 49.09456	+89 15 50.7923	3.00	2.62	2.02	1.53	1.22	F8Ib	716	2
4	NAME Perseus Cloud	SFR	03 35.0	+31 13						~	1553	0
5	NAME Per Region	reg	03 37 00.0	+31 15 00						~	296	0
6	NAME Taurus Complex	SFR	04 41.0	+25 52						~	4971	0
7	M 42	HII	05 35 16.8	-05 23 15						~	4411	0
8	NAME Ori B	MoC	05 41 43.0	-01 54 44						~	1498	0
9	M 78	RNe	05 46 45.8	+00 04 45		8.0				~	397	0
10	NGC 2071	RNe	05 47 10	+00 18.0						~	661	1
11	NAME Rosette Nebula	HII	06 32 26.76	+04 47 37.1						~	522	1
12	NGC 2264	OpC	06 40 53.7	+09 52 32						~	1876	0
13	NAME Vela	SNR	08 34.0	-45 50						~	1331	2
14	NGC 4559	H2G	12 35 57.6402869976	+27 57 35.859278160		10.46	10.01			~	667	1
15	GRS G308.60 +00.60	HII	13 39.9	-61 45						~	108	0
16	RCW 82	HII	13 59.3	-61 27						~	33	0
17	NAME Lupus Complex	SFR	16 03	-38.1						~	851	0
18	NAME Ophiuchus Molecular Cloud	SFR	16 28 06	-24 32.5						~	3969	1
19	SH 2-3	HII	17 12.4	-38 28						~	234	1
20	NAME the Pipe Nebula	DNe	17 30	-25.0						~	442	1
21	M 16	OpC	18 18 45.1	-13 47 31						~	1084	1
22	NAME Aql Region	reg	18 31.1	-02 10						~	456	0
23	LBN 028.77+03.43	HII	18 31 26.5	-02 04 22						~	255	2
24	NAME Aql Rift	DNe	18 32	-01.0						~	355	1
25	W 43	SFR	18 47 32	-01 56.5						~	604	0
26	SNR G035.2-01.8	SNR	19 01.6	+01 14						~	158	0
27	NAME Cyg X	Cld	20 30 04.7973633	+40 51 36.002197						~	962	1
28	NAME Cepheus Region	reg	21 20 00.0	+72 30 00						~	126	0
29	IC 5146	OpC	21 53 29.3	+47 14 46						~	507	2
30	NAME Cepheus Cloud	SFR	22 00.0	+76 30						~	165	0
31	NGC 7538	OpC	23 13 37	+61 30.0						~	920	1
32	NAME Gould Belt	PoG	~	~						~	956	1

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