2025PASJ...77..260I

Query : 2025PASJ...77..260I

2025PASJ...77..260I - Publ. Astron. Soc. Jap., 77, 260-276 (2025/April-0)

Solving self-calibration of ALMA data with an optimization method.

IKEDA S., NAKAZATO T., TSUKAGOSHI T., TAKEUCHI T.T. and YAMAGUCHI M.

Abstract (from CDS):

We reformulate the gain correction problem of radio interferometry as an optimization problem with regularization, which is solved efficiently with an iterative algorithm. Combining this new method with our previously proposed imaging method, PRIISM, the whole process of the self-calibration of radio interferometry is redefined as a single optimization problem with regularization. As a result, the gains are corrected and an image is estimated. We tested the new approach with ALMA observation data and found that it provides promising results.

Abstract Copyright: © The Author(s) 2025. Published by Oxford University Press on behalf of the Astronomical Society of Japan.

Journal keyword(s): methods: data analysis - techniques: image processing - techniques: interferometric

Simbad objects: 5

Full paper

View the references in ADS

Number of rows : 5

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	V* HL Tau	Or*	04 31 38.5107609312	+18 13 57.859747968		15.89	14.49	14.39		K5	1546	0
2	SDP 81	LeG	09 03 11.574	+00 39 06.55						~	106	0
3	M 87	AGN	12 30 49.42338414	+12 23 28.0436859	10.16	9.59	8.63		7.49	~	7815	3
4	HD 142527	Ae*	15 56 41.8882637904	-42 19 23.248281828		9.04	8.34			F6III	741	1
5	NAME Sgr A*	X	17 45 40.03599	-29 00 28.1699						~	4970	3

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