2016ApJ...827L..13W

Query : 2016ApJ...827L..13W

2016ApJ...827L..13W - Astrophys. J., 827, L13-L13 (2016/August-2)

A 78 day X-ray period detected from NGC 5907 ULX1 by Swift.

WALTON D.J., FURST F., BACHETTI M., BARRET D., BRIGHTMAN M., FABIAN A.C., GEHRELS N., HARRISON F.A., HEIDA M., MIDDLETON M.J., RANA V., ROBERTS T.P., STERN D., TAO L. and WEBB N.

Abstract (from CDS):

We report the detection of a 78.1±0.5 day period in the X-ray light curve of the extreme ultraluminous X-ray source NGC 5907 ULX1 (L_{X,peak}∼5×{10}^{40} ergs^-1), discovered during an extensive monitoring program with Swift. These periodic variations are strong, with the observed flux changing by a factor of ∼3-4 between the peaks and the troughs of the cycle; our simulations suggest that the observed periodicity is detected comfortably in excess of 3σ significance. We discuss possible origins for this X-ray period, but conclude that at the current time we cannot robustly distinguish between orbital and super-orbital variations.

Abstract Copyright: © 2016. The American Astronomical Society. All rights reserved.

Journal keyword(s): black hole physics - X-rays: binaries - X-rays: individual: NGC 5907 ULX1

Simbad objects: 15

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Number of rows : 15
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 [BWE2015] NGC 55 119 ULX 00 15 28.89 -39 13 18.8           ~ 73 0
2 [FWB2009] HLX-1 ULX 01 10 28.30 -46 04 22.3     24.5 23.80   ~ 230 1
3 2CXO J095550.1+694046 HXB 09 55 50.12 +69 40 46.4           ~ 294 1
4 M 82 AGN 09 55 52.430 +69 40 46.93 9.61 9.30 8.41     ~ 6156 6
5 V* BP Cru HXB 12 26 37.5605188992 -62 46 13.261044684   12.482 10.803 10.304   B1Ia+ 731 0
6 M 51 Sy2 13 29 52.698 +47 11 42.93   9.26 8.36 8.40   ~ 4565 4
7 [FK2005] 25 ULX 14 03 19.63 -41 22 58.7           ~ 252 0
8 NGC 5906 GiG 15 15 53.687 +56 19 43.86   11.4       ~ 807 0
9 NAME NGC 5907 ULX ULX 15 15 58.60 +56 18 10.0           ~ 180 0
10 V* HZ Her LXB 16 57 49.8110126616 +35 20 32.486555472 11.90 14.89 13.63 13.88   B3/6ep 2172 0
11 SS 433 HXB 19 11 49.5647697480 +04 58 57.827127648   16.854 14.643     A7Ib 2253 4
12 HD 226868 HXB 19 58 21.6757355952 +35 12 05.784512688 9.38 9.72 8.91 8.42   O9.7Iabpvar 4590 0
13 M 72 GlC 20 53 27.70 -12 32 14.3     8.96     ~ 465 0
14 NGC 7793 GiG 23 57 49.7540045856 -32 35 27.701550744 10.26 9.74 9.28 9.06 9.7 ~ 1188 2
15 NAME NGC 7793 P13 ULX 23 57 50.90 -32 37 26.6           ~ 225 0

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