{"id":372,"date":"2020-04-28T11:40:46","date_gmt":"2020-04-28T11:40:46","guid":{"rendered":"http:\/\/users.utu.fi\/kiikol\/?page_id=372"},"modified":"2020-04-28T12:32:21","modified_gmt":"2020-04-28T12:32:21","slug":"1915-2","status":"publish","type":"page","link":"https:\/\/users.utu.fi\/kiikol\/1915-2\/","title":{"rendered":"19\/20 X-ray flaring events of GRS 1915+105"},"content":{"rendered":"<figure id=\"attachment_396\" aria-describedby=\"caption-attachment-396\" style=\"width: 605px\" class=\"wp-caption alignnone\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-396 size-large\" src=\"https:\/\/users.utu.fi\/kiikol\/wp-content\/uploads\/sites\/116\/2020\/04\/peculiar_period-1024x676.png\" alt=\"\" width=\"605\" height=\"399\" srcset=\"https:\/\/users.utu.fi\/kiikol\/wp-content\/uploads\/sites\/116\/2020\/04\/peculiar_period-1024x676.png 1024w, https:\/\/users.utu.fi\/kiikol\/wp-content\/uploads\/sites\/116\/2020\/04\/peculiar_period-300x198.png 300w, https:\/\/users.utu.fi\/kiikol\/wp-content\/uploads\/sites\/116\/2020\/04\/peculiar_period-768x507.png 768w, https:\/\/users.utu.fi\/kiikol\/wp-content\/uploads\/sites\/116\/2020\/04\/peculiar_period-100x66.png 100w, https:\/\/users.utu.fi\/kiikol\/wp-content\/uploads\/sites\/116\/2020\/04\/peculiar_period-150x99.png 150w, https:\/\/users.utu.fi\/kiikol\/wp-content\/uploads\/sites\/116\/2020\/04\/peculiar_period-200x132.png 200w, https:\/\/users.utu.fi\/kiikol\/wp-content\/uploads\/sites\/116\/2020\/04\/peculiar_period-450x297.png 450w, https:\/\/users.utu.fi\/kiikol\/wp-content\/uploads\/sites\/116\/2020\/04\/peculiar_period-600x396.png 600w, https:\/\/users.utu.fi\/kiikol\/wp-content\/uploads\/sites\/116\/2020\/04\/peculiar_period-900x594.png 900w, https:\/\/users.utu.fi\/kiikol\/wp-content\/uploads\/sites\/116\/2020\/04\/peculiar_period.png 1312w\" sizes=\"auto, (max-width: 605px) 100vw, 605px\" \/><figcaption id=\"caption-attachment-396\" class=\"wp-caption-text\">Fig. 1: Daily cadence Swift\/BAT light curves of GRS 1915+105, taken during the ongoing peculiar accretion state. We recently discovered a potentially periodic (period of \u223c 42.8 days) X-ray flaring pattern (marked in the figure).<\/figcaption><\/figure>\n<figure id=\"attachment_390\" aria-describedby=\"caption-attachment-390\" style=\"width: 605px\" class=\"wp-caption alignnone\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-390 size-large\" src=\"https:\/\/users.utu.fi\/kiikol\/wp-content\/uploads\/sites\/116\/2020\/04\/swift_xrt_4th_flare-1024x1024.png\" alt=\"\" width=\"605\" height=\"605\" srcset=\"https:\/\/users.utu.fi\/kiikol\/wp-content\/uploads\/sites\/116\/2020\/04\/swift_xrt_4th_flare-1024x1024.png 1024w, https:\/\/users.utu.fi\/kiikol\/wp-content\/uploads\/sites\/116\/2020\/04\/swift_xrt_4th_flare-300x300.png 300w, https:\/\/users.utu.fi\/kiikol\/wp-content\/uploads\/sites\/116\/2020\/04\/swift_xrt_4th_flare-150x150.png 150w, https:\/\/users.utu.fi\/kiikol\/wp-content\/uploads\/sites\/116\/2020\/04\/swift_xrt_4th_flare-768x767.png 768w, https:\/\/users.utu.fi\/kiikol\/wp-content\/uploads\/sites\/116\/2020\/04\/swift_xrt_4th_flare-1536x1534.png 1536w, https:\/\/users.utu.fi\/kiikol\/wp-content\/uploads\/sites\/116\/2020\/04\/swift_xrt_4th_flare-100x100.png 100w, https:\/\/users.utu.fi\/kiikol\/wp-content\/uploads\/sites\/116\/2020\/04\/swift_xrt_4th_flare-200x200.png 200w, https:\/\/users.utu.fi\/kiikol\/wp-content\/uploads\/sites\/116\/2020\/04\/swift_xrt_4th_flare-450x449.png 450w, https:\/\/users.utu.fi\/kiikol\/wp-content\/uploads\/sites\/116\/2020\/04\/swift_xrt_4th_flare-600x599.png 600w, https:\/\/users.utu.fi\/kiikol\/wp-content\/uploads\/sites\/116\/2020\/04\/swift_xrt_4th_flare-900x899.png 900w, https:\/\/users.utu.fi\/kiikol\/wp-content\/uploads\/sites\/116\/2020\/04\/swift_xrt_4th_flare.png 1550w\" sizes=\"auto, (max-width: 605px) 100vw, 605px\" \/><figcaption id=\"caption-attachment-390\" class=\"wp-caption-text\">Fig. 2: GRS 1915+105 Swift\/XRT lightcurve (1-10 keV band) from pointing 00012178037 which coincided with the most recent (i.e. fourth) flare shown in the figure above. The color marks two hardness ratios (HR1: 3-6 keV \/ 1-3 keV and HR2: 6-10 keV \/ 3-6 keV). The flares are definitely harder than the non-flare periods. There is some evolution of the hardness ratios during the flares as well: during the rise HR2 increases, while during the decay HR1 increases.<\/figcaption><\/figure>\n","protected":false},"excerpt":{"rendered":"","protected":false},"author":122,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-372","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/users.utu.fi\/kiikol\/wp-json\/wp\/v2\/pages\/372","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/users.utu.fi\/kiikol\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/users.utu.fi\/kiikol\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/users.utu.fi\/kiikol\/wp-json\/wp\/v2\/users\/122"}],"replies":[{"embeddable":true,"href":"https:\/\/users.utu.fi\/kiikol\/wp-json\/wp\/v2\/comments?post=372"}],"version-history":[{"count":8,"href":"https:\/\/users.utu.fi\/kiikol\/wp-json\/wp\/v2\/pages\/372\/revisions"}],"predecessor-version":[{"id":417,"href":"https:\/\/users.utu.fi\/kiikol\/wp-json\/wp\/v2\/pages\/372\/revisions\/417"}],"wp:attachment":[{"href":"https:\/\/users.utu.fi\/kiikol\/wp-json\/wp\/v2\/media?parent=372"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}