2020AJ....159..163F

Query : 2020AJ....159..163F

2020AJ....159..163F - Astron. J., 159, 163-163 (2020/April-0)

Multiband probabilistic cataloging: a joint fitting approach to point-source detection and deblending.

FEDER R.M., PORTILLO S.K.N., DAYLAN T. and FINKBEINER D.

Abstract (from CDS):

Probabilistic cataloging (PCAT) outperforms traditional cataloging methods on single-band optical data in crowded fields. We extend our work to multiple bands, achieving greater sensitivity (∼0.4 mag) and greater speed (500x) compared to previous single-band results. We demonstrate the effectiveness of multiband PCAT on mock data, in terms of both recovering accurate posteriors in the catalog space and directly deblending sources. When applied to Sloan Digital Sky Survey (SDSS) observations of M2, taking Hubble Space Telescope data as truth, our joint fit on r- and i-band data goes ∼0.4 mag deeper than single-band probabilistic cataloging and has a false discovery rate less than 20% for F606W <= 20. Compared to DAOPHOT, the two-band SDSS catalog fit goes nearly 1.5 mag deeper using the same data and maintains a lower false discovery rate down to F606W ∼ 20.5. Given recent improvements in computational speed, multiband PCAT shows promise in application to large-scale surveys and is a plausible framework for joint analysis of multi-instrument observational data. https://github.com/RichardFeder/multiband_pcat.

Journal keyword(s): Catalogs - Star counts - Sky surveys - Globular star clusters - Bayesian statistics - Hierarchical models

Simbad objects: 1

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Number of rows : 1

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	M 2	GlC	21 33 27.02	-00 49 23.7			6.25			~	1114	1

Query : 2020AJ....159..163F

Basic data :

M 2 -- Globular Cluster

GlC (2013A&A,GCl), * (BD,GCRV,...), Cl* (C,[KPS2012])

21 33 27.02 -00 49 23.7 (Optical) [ ] D 2010AJ....140.1830G

21 30 52.58 -01 02 44.5 [ ]

053.37088 -35.76976 [ ]

3.51 -2.16 [0.01 0.01 90] C 2019MNRAS.482.5138B

V(km/s) -3.6 [0.3] / z(spectroscopic) -0.000012 [0.000001] / cz -3.60 [0.30] (Opt) A 2018MNRAS.478.1520B

0.082 [0.011] C 2021MNRAS.505.5978V

12.9 12.9 90 (Opt) D 1989Sci...246.1066D

V 6.25 [~] D 2012AJ....144..126D

K 4.70 [~] D 2008MNRAS.389.1924F

g (AB) 7.297 [0.030] C 2014MNRAS.437.1725V

r (AB) 6.836 [0.044] C 2014MNRAS.437.1725V

i (AB) 6.567 [0.044] C 2014MNRAS.437.1725V

z (AB) 6.384 [0.044] C 2014MNRAS.437.1725V

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`M 2`	`C 2130-010`	`GCRV 13546`	`NGC 7089`
`BD-01 4175`	`GCl 121`	`HD 205146`	`[KPS2012] MWSC 3526`

References (1114 between 1850 and 2026) (Total 1114)
Simbad bibliographic survey began in 1850 for stars (at least bright stars) and in 1983 for all other objects (outside the solar system).

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Data at NED - NASA/IPAC Extragalactic Database : M 2

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BD-01 4175 HD 205146 NGC 7089

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