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| Query : 2002MNRAS.335...73M |
2002MNRAS.335...73M - Mon. Not. R. Astron. Soc., 335, 73-83 (2002/September-1)
A two-dimensional Kolmogorov-Smirnov test for crowded field source detection: ROSAT sources in NGC 6397.
METCHEV S.A. and GRINDLAY J.E.
Abstract (from CDS):
We present a two-dimensional version of the classical one-dimensional Kolmogorov-Smirnov (KS) test, extending an earlier idea due to Peacock and an implementation proposed by Fasano and Franceschini. The two-dimensional KS test is used to optimize the goodness of fit in an iterative source-detection scheme for astronomical images. The method is applied to a ROSAT/HRI X-ray image of the post-core-collapse globular cluster NGC 6397 to determine the most probable source distribution in the cluster core. Comparisons to other widely used source-detection methods, and to a Chandra image of the same field, show that our iteration scheme is superior in measuring statistics-limited sources in severely crowded fields.
Abstract Copyright: RAS
Journal keyword(s): methods: data analysis - methods: statistical - globular clusters: individual: NGC 6397 - X-rays: stars.
Nomenclature: Table 6: [MG2002] XN (Nos X1-X6).
Simbad objects: 10
| Number of rows : 10 |
| 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 | Cl* NGC 6397 PCBY 4 | BY* | 17 40 40.543 | -53 40 22.79 | 19.03 | 17.68 | ~ | 7 | 0 | |||
| 2 | [MG2002] X1 | X | 17 40 41.46 | -53 40 18.4 | ~ | 1 | 0 | |||||
| 3 | CGKB B | LXB | 17 40 41.468 | -53 40 04.43 | ~ | 25 | 0 | |||||
| 4 | [CGC98] CV 5 | * | 17 40 41.53 | -53 40 26.4 | ~ | 1 | 0 | |||||
| 5 | Cl* NGC 6397 SAW V12 | CV* | 17 40 41.597 | -53 40 19.30 | 18.51 | 17.95 | 17.88 | ~ | 23 | 0 | ||
| 6 | [CGC98] CV 4 | CV* | 17 40 41.67 | -53 40 19.5 | ~ | 8 | 0 | |||||
| 7 | NGC 6397 | GlC | 17 40 42.09 | -53 40 27.6 | 5.17 | ~ | 2103 | 0 | ||||
| 8 | Cl* NGC 6397 SAW V34 | CV* | 17 40 42.306 | -53 40 28.70 | 20.02 | 18.87 | ~ | 25 | 0 | |||
| 9 | Cl* NGC 6397 SAW V31 | El? | 17 40 42.6230201282 | -53 40 27.291274010 | 16.41 | 15.95 | 16.10 | ~ | 22 | 0 | ||
| 10 | V* V1139 Ara | CV* | 17 40 42.651 | -53 40 19.30 | 19.10 | 18.52 | ~ | 22 | 0 |
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