Discovery of Galactic O iv and O v X-ray absorption due to transition temperature gas in the PKS 2155-304 spectrum

J. Nevalainen; B. Wakker; J. Kaastra; M. Bonamente; S. Snowden; F. Paerels; C. de Vries

doi:10.1051/0004-6361/201630336

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Volume 605 (September 2017)

A&A, 605 (2017) A47

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Table A.1

RGS observations.

Orbit	obsid	norm^a	Γ ^b	t^c (ks)

174	0080940101	4069	2.69	59
174	0080940301	3288	2.76	60
362	0124930301	8558	2.65	90
450	0124930501	3782	2.55	102
545	0124930601	2867	2.59	114
724	0158960101	2120	2.85	27
908	0158960901	2397	2.87	29
908	0158961001	3217	2.77	40
993	0158961101	4442	2.64	29
1095	0158961301	4714	2.71	60
1171	0158961401	1836	2.69	65
1266	0411780101	2682	2.64	100
1349	0411780201	4613	2.77	68
1543	0411780301	5463	2.68	61
1734	0411780401	3578	2.87	65
1902	0411780501	1843	2.79	71
2084	0411780601	3053	2.56	64
2268	0411780701	708	2.85	57
2449	0411782101	1579	2.74	76
2542	0727770101	1724	2.60	95
2631	0727770501	1900	2.76	88
2633	0727770901	1676	2.82	64
2632	0727771001	1498	2.74	39
2632	0727771101	1879	2.83	39
2726	0727771301	1336	2.64	92

Total				1700 ks

Notes.

^(a)

The normalisation of the absorbed power-law fitted to the RGS data over the full band; the units are 4π× the number of photons m^-2 s^-1 keV^-1 at 1 keV.

^(b)

The best-fit photon index of the power-law described above.

^(c)

The exposure time.

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