2024RNAAS...8....1A

Query : 2024RNAAS...8....1A

2024RNAAS...8....1A - Research Notes of the AAS, 8, 1-1 (2024/January-0)

Spectral Fit Residuals as an Indicator to Increase Model Complexity.

ACHARYA A. and KASHYAP V.L.

Abstract (from CDS):

Spectral fitting of X-ray data usually involves minimizing statistics like the chi-square and the Cash statistic. Here we discuss their limitations and introduce two measures based on the cumulative sum (CuSum) of model residuals to evaluate whether model complexity could be increased: the percentage of bins exceeding a nominal threshold in a CuSum array (pctCuSum), and the excess area under the CuSum compared to the nominal (parea). We demonstrate their use with an application to a Chandra ACIS spectral fit.

Abstract Copyright: © 2024. The Author(s). Published by the American Astronomical Society.

Journal keyword(s): Astrostatistics tools - X-ray astronomy - Astronomy software

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 HD 179949 BY* 19 15 33.2300695008 -24 10 45.671448072   6.772 6.237     F8V 435 1

Query : 2024RNAAS...8....1A

Basic data :
HD 179949 -- BY Dra Variable
Other object types: otypes_help 		* (2015A&A,HD,...), MIR (WISEA,WISE), BY* (2017ARep), PM* (2007A&A), V* (V*), X (1RXS), UV (TD1), NIR (2MASS), IR (IRAS)
ICRS coord. (ep=J2000) : 		19 15 33.2300695008 -24 10 45.671448072 (Optical) [ 0.0250 0.0281 90 ] A 2020yCat.1350....0G
FK4 coord. (ep=B1950 eq=1950) : 		19 12 30.5076648741 -24 15 58.713547130 [ 0.0250 0.0281 90 ]
Gal coord. (ep=J2000) : 		013.4555546706262 -15.7859465055363 [ 0.0250 0.0281 90 ]
Proper motions mas/yr : 		118.567 -102.364 [0.030 0.022 90] A 2020yCat.1350....0G
Radial velocity / Redshift / cz : 		V(km/s) -24.619 [0.0010] / z(spectroscopic) -0.000082 [0.000000] / cz -24.62 [0.00]
   (Opt) A 2018A&A...616A...7S
Parallaxes (mas): 		36.3115 [0.0375] A 2020yCat.1350....0G
Spectral type: 		F8V C 1988MSS...C04....0H
Fluxes (6) :
B 6.772 [0.015] D 2000A&A...355L..27H
V 6.237 [0.010] D 2000A&A...355L..27H
G 6.119344 [0.002800] C 2020yCat.1350....0G
J 5.296 [0.027] C 2003yCat.2246....0C
H 5.10 [0.04] C 2003yCat.2246....0C
K 4.936 [0.018] C 2003yCat.2246....0C
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Hierarchy : number of linked objects
whatever the membership probability is (see description here ) :

: 1
: 1 		: 1691 Display criteria :

Identifiers (32) :
An access of full data is available using the icon Vizier near the identifier of the catalogue

HD 179949 HIP 94645 1RXS J191533.7-241114 UBV M 23594
CD-24 15161 HR 7291 SAO 187883 uvby98 100179949
CPD-24 6650 IRAS 19126-2415 SKY# 35741 V* V5652 Sgr
GC 26518 2MASS J19153322-2410455 SPOCS 833 WISEA J191533.32-241046.3
GEN# +1.00179949 NAME-IAU Gumala SRS 15386 WISE J191533.32-241046.5
GJ 749 PLX 4482.02 TD1 24207 YZ 114 13391
GSC 06875-03273 PMC 90-93 6590 TIC 2288734 Gaia DR3 6770313530317154560
HIC 94645 PPM 269532 TYC 6875-3273-1 Gaia DR2 6770313530317154560

References (435 between 1850 and 2026) (Total 435)
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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Collections of Measurements Description of Measurements

Velocities : 7    Diameter : 1    Distance : 2    Var : 1    Rot : 12    Fe/H : 46    Plx : 5    PM : 5    SpT : 4   

   

Observing logs
Herschel : 2   

   

External archives :

Archive data at HEASARC - High-Energy Astrophysics Science Archive Research Center

Data at NED - NASA/IPAC Extragalactic Database : HD 179949

Link by name to the catalogue in VizieR :

HD 179949 CD-24 15161 CPD-24 6650 GJ 749 GSC 06875-03273
HIC 94645 HIP 94645 HR 7291 IRAS 19126-2415 2MASS J19153322-2410455
PPM 269532 1RXS J191533.7-241114 SAO 187883 TD1 24207 TYC 6875-3273-1
uvby98 100179949 V* V5652 Sgr WISEA J191533.32-241046.3 WISE J191533.32-241046.5 Gaia DR3 6770313530317154560
Gaia DR2 6770313530317154560

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