2025RNAAS...9..128B

Query : 2025RNAAS...9..128B

2025RNAAS...9..128B - Research Notes of the AAS, 9, 128 (2025/May-0)

The NIRSpec IFU Point Spread Function.

BENTZ M.C.

Abstract (from CDS):

I provide characterizations of the point-spread function (PSF) of the high-resolution observing mode of the NIRSpec integral field unit on JWST. Using observations of an isolated late-type star, the two-dimensional shape of the star was modeled with concentric Gaussian profiles. The widths and weights of the representative Gaussian components that comprise the PSF model for a variety of drizzle reference frames and final spaxel sizes are presented. The PSF is noticeably elongated, with an axis ratio of ∼0.75. Both elongated PSF models as well as circular approximations to the PSF shape are included. The PSF is generally well-represented by a pair of concentric Gaussians, with ∼75% of the flux contained in a narrow core with a width on the order of a single spaxel, and the other ∼25% of the flux in a more extended halo.

Journal keyword(s): James Webb Space Telescope - Astronomical instrumentation

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	BD+04 3653	*	18 13 19.3350110856	+05 00 34.618441752		11.29	10.79			kA4hA7mA8	6	0

Query : 2025RNAAS...9..128B

Basic data :

BD+04 3653 -- Star

* (BD,AG,...), NIR (2MASS), Opt (LAMOST)

18 13 19.3350110856 +05 00 34.618441752 (Optical) [ 0.0330 0.0309 90 ] A 2020yCat.1350....0G

18 10 51.3876852309 +04 59 41.950671168 [ 0.0330 0.0309 90 ]

033.0788179048559 +10.7537543215665 [ 0.0330 0.0309 90 ]

1.801 -3.814 [0.042 0.038 90] A 2020yCat.1350....0G

1.9164 [0.0373] A 2020yCat.1350....0G

kA4hA7mA8 D 2023ApJS..266...14T

B 11.29 [0.08] D 2000A&A...355L..27H

V 10.79 [0.09] D 2000A&A...355L..27H

G 10.733835 [0.002767] C 2020yCat.1350....0G

J 10.125 [0.024] C 2003yCat.2246....0C

H 9.985 [0.031] C 2003yCat.2246....0C

K 9.953 [0.021] C 2003yCat.2246....0C

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`BD+04 3653`	`2MASS J18131934+0500346`	`TYC 439-1174-1`	`Gaia DR1 4470791471716487680`
`AG+04 2288`	`PPM 165412`	`Gaia DR2 4470791471716487680`
`LAMOST J181319.22+050031.0`	`TIC 264534327`	`Gaia DR3 4470791471716487680`

References (6 between 1850 and 2026) (Total 6)
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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`BD+04 3653`	`AG+04 2288`	`2MASS J18131934+0500346`	`PPM 165412`	`TYC 439-1174-1`
`Gaia DR2 4470791471716487680`	`Gaia DR3 4470791471716487680`	`Gaia DR1 4470791471716487680`

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