Long tails on thermonuclear X-ray bursts from neutron stars: a signature of inward heating?

J. J. M. in 't Zand; L. Keek; A. Cumming; A. Heger; J. Homan; M. Méndez

doi:10.1051/0004-6361/200811432

Home

All issues

Volume 497 / No 2 (April II 2009)

A&A, 497 2 (2009) 469-480

Full HTML

Free Access

Table 2:

Summary of measurements.
Burst source	Mean burst duration (s)^a			Tail/prompt ratio		Ref.^b
	time scale^c	$\tau_2^d$	tail^e	in time^f	in fluence^g
Sources discussed here
GS 1826-24	$39.4\pm0.2$	44.6	$1252\pm25$	32/28	0.03 (300 s)
			(600-5500 s)
			$\chi^2/\nu$ = 16.9/15
4U 1728-34	$5.85\pm0.02$	12.6	$313\pm17$	53/25	0.09 (100 s)
			(200-800 s)
			$\chi^2/\nu$ = 13.4/11
EXO 0748-676	$13.7\pm0.1$	36.3	$300\pm42^h$	22/8	0.01 (300 s)
			(400-1200 s)
			$\chi^2/\nu$ = 141/44
Literature cases
GX 3+1	$3\pm1$	6	1110 $\pm$ 170	370/185	40 (10 s)	1
M 28		7.5	800-3250	$\sim$ 100	>1.4ⁱ (90 s)	2
Aql X-1	18.4		$627\pm100$	34		3
OSO-8 long burst	44.8		215.7	5	0.01 (150 s)	4

^a Averaged over the bursts cataloged by Galloway et al. (2008); ^b references: 1 - Chenevez et al. (2006); 2 - Gotthelf & Kulkarni (1997); 3 - Czerny et al. (1987); 4 - Swank et al. (1977); ^c the time scale is defined as the burst fluence divided by the peak flux; ^d $\tau_2$ is the e-folding decay time of the final part of the prompt burst; ^e the time range in parentheses refers to the interval in which the fit was carried out; ^f the two numbers refer to division by the mean time scale and $\tau_2$ , respectively; ^g fluences for GS 1826-24 and 4U 1728-34 were determined from data averaged over multiple bursts; that for EXO 0748-676 from the RXTE triple burst. The time between parentheses refers to the interval for the prompt emission; ^h this value applies to the triple burst only and excluding times for the second burst; ⁱ based on counts of 0.8-12 keV photons in ASCA-GIS (Table 1 in Gotthelf & Kulkarni 1997).

Source LaTeX | All tables | In the text

Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.

Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.

Initial download of the metrics may take a while.