1997A&AS..126..177K

Query : 1997A&AS..126..177K

1997A&AS..126..177K - Astron. Astrophys., Suppl. Ser., 126, 177-181 (1997/November-2)

Determination of the atmospheric point spread function by a parameter search.

KRISHNAKUMAR V. and VENKATAKRISHNAN P.

Abstract (from CDS):

The result of blind deconvolution is a reconstructed image that has non positive intensities. The number of these non positive pixels has been used as an estimator for the departure from a perfect reconstruction. Simulations of reconstruction of objects convolved with a kernel having one or two parameters are shown to demonstrate the efficiency of the estimator. We thus present a technique of determining the unknown parameters of the point spread function by searching for the point in parameter space with the lowest number of nonpositive pixels. It is also shown that the parameters of the convolving kernel can be obtained even in the presence of noise. This method was validated using a long exposure image of NGC 1409.

Abstract Copyright: ∼

Journal keyword(s): techniques: image processing - atmospheric effects - globular clusters: individual: NGC 1409

Errata: Erratum vol. 131, p. 195

Simbad objects: 1

Full paper

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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	NGC 1409	Sy2	03 41 10.4682070631	-01 18 09.476001946		14.7				~	83	0

Query : 1997A&AS..126..177K

Basic data :

NGC 1409 -- Seyfert 2 Galaxy

Sy2 (), G (2016A&A,6dFGS,...), AGN ([HB91]), LSB (ISI96), GiP (KPG), * (Gaia), NIR (2MASS), MIR (WISE), IR ([DML87]), Opt (PSO)

03 41 10.4682070631 -01 18 09.476001946 (Optical) [ 4.4850 4.3514 90 ] C 2020yCat.1350....0G

03 38 38.0454376827 -01 27 44.738765807 [ 4.4850 4.3514 90 ]

187.8158781877054 -41.8401723361353 [ 4.4850 4.3514 90 ]

V(km/s) 7312 [60] / z(~) 0.02469 [0.00020] / cz 7403.0 [60.0] D 1999PASP..111..438F

E D ~

0.93 0.74 143 (Opt) D 2003A&A...412...45P

B 14.7 [~] E ~

G 19.479990 [0.031585] C 2022yCat.1355....0G

J 10.788 [0.027] C 2006AJ....131.1163S

H 9.934 [0.030] C 2006AJ....131.1163S

K 9.644 [0.039] C 2006AJ....131.1163S

z (AB) 15.1852 [0.0748] C 2017yCat.2349....0C

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`NGC 1409`	`2MASS J03411046-0118095`	`UZC J034110.4-011806`	`[CCA99] UGC 2821a`
`6dFGS gJ034110.5-011810`	`2MASX J03411054-0118101`	`WISE J034110.45-011809.3`	`[DML87] 603`
`ISI96 0338-0127`	`MCG+00-10-011`	`ZW III 55`	`[HB91] 0338-014`
`KPG 93a`	`PSO J055.2936-01.3026`	`Z 391-28`	`Gaia DR3 3251391883474434048`
`LEDA 13553`	`UGC 2821`	`Z 0338.7-0127`

References (83 between 1850 and 2026) (Total 83)
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 : NGC 1409

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`NGC 1409`	`KPG 93a`	`2MASS J03411046-0118095`	`2MASX J03411054-0118101`	`UGC 2821`
`WISE J034110.45-011809.3`	`[DML87] 603`	`Gaia DR3 3251391883474434048`

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