1,725,631 research outputs found
Late-time observations of the relativistic tidal disruption flare candidate Swift J1112.2-8238
No full textWe present late-time follow-up of the relativistic tidal disruption flare (rTDF) candidate Swift J1112.2−8238. We confirm the previously determined redshift of z = 0.8900 ± 0.0005 based on multiple emission line detections. Hubble Space Telescope imaging of the host galaxy indicates a complex and distorted morphology with at least two spatially distinct components. These are offset in velocity space by less than 350 km s−1 in VLT/X-Shooter observations, suggesting that the host is undergoing interaction with another galaxy. The transient position is consistent to 2.2σ with the centre of a bulge-like component at a distance of 1.1 ± 0.5 kpc from its centre. Luminous, likely variable radio emission has also been observed, strengthening the similarities between Swift J1112.2−8238 and other previously identified rTDFs. While the transient location is ∼ 2σ from the host centroid, the disrupted nature of the host may provide an explanation for this. The tidal disruption model remains a good description for these events
Late-time observations of the relativistic tidal disruption flare candidate Swift J1112.2-8238
No full textWe present late-time follow-up of the relativistic tidal disruption flare candidate Swift J1112.2- 8238. We confirm the previously determined redshift of z = 0.8900±0.0005 based on multiple emission line detections. HST imaging of the host galaxy indicates a complex and distorted morphology with at least two spatially distinct components. These are offset in velocity space by less than 350 km s−1 in VLT/X-Shooter observations, suggesting that the host is undergoing interaction with another galaxy. The transient position is consistent to 2.2σ with the centre of a bulge-like component at a distance of 1.1±0.5kpc from its centre. Luminous, likely variable radio emission has also been observed, strengthening the similarities between Swift J1112.2-8238 and other previously identified relativistic tidal disruption flares. While the transient location is ∼2σ from the host centroid, the disrupted nature of the host may provide an explanation for this. The tidal disruption model remains a good description for these events
محضر رقم 8238 مشروع اللوائح العامه للدراسات العليا الجديده
No full textمحضر رقم 8238 مشروع اللوائح العامه للدراسات العليا الجديد
[Gulf States Steel Co., Engine Drawing Card, Sketch No. 8238]
No full textThis engine drawing card was created for Gulf States Steel Company, Class 4-20 C. J-4C. Sketch 8238. Copy Spec. 33D50
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Swift J1112.2-8238: A Candidate Relativistic Tidal Disruption Flare
No full textWe present observations of Swift J1112.2-8238, and identify it as a candidate relativistic tidal disruption flare (rTDF). The outburst was first detected by Swift/BAT in June 2011 as an unknown, long-lived (order of days) γ-ray transient source. We show that its position is consistent with the nucleus of a faint galaxy for which we establish a likely redshift of z = 0.89 based on a single emission line that we interpret as the blended [Oii]λ3727 doublet. At this redshift, the peak X/γ-ray luminosity exceeded 1047 ergs s−1, while a spatially coincident optical transient source had i 0∼22 (Mg∼ − 21.4 at z = 0.89) during early observations, ∼20 days after the Swift trigger. These properties place Swift J1112.2-8238 in a very similar region of parameter space to the two previously identified members of this class, Swift J1644+57 and Swift J2058+0516. As with those events the high-energy emission shows evidence for variability over the first few days, while late time observations, almost 3 years postoutburst, demonstrate that it has now switched off. Swift J1112.2-8238 brings the total number of such events observed by Swift to three, interestingly all detected by Swift over a ∼3 month period (< 3% of its total lifetime as of March 2015). While this suggests the possibility that further examples may be uncovered by detailed searches of the BAT archives, the lack of any prime candidates in the years since 2011 means these events are undoubtedly rare.AstronomyAccepted Manuscrip
Swift J1112.2−8238 : a candidate relativistic tidal disruption flare
No full textWe present observations of Swift J1112.2−8238, and identify it as a candidate relativistic tidal disruption flare. The outburst was first detected by Swift/Burst Alert Telescope (BAT) in 2011 June as an unknown, long-lived (order of days) gamma-ray transient source. We show that its position is consistent with the nucleus of a faint galaxy for which we establish a likely redshift of z = 0.89 based on a single emission line that we interpret as the blended [O II] λ3727 doublet. At this redshift, the peak X-ray/gamma-ray luminosity exceeded 1047 erg s−1, while a spatially coincident optical transient source had I ∼ 22 (Mg ∼ −21.4 at z = 0.89) during early observations, ∼20 d after the Swift trigger. These properties place Swift J1112.2−8238 in a very similar region of parameter space to the two previously identified members of this class, Swift J1644+57 and Swift J2058+0516. As with those events the high-energy emission shows evidence for variability over the first few days, while late time observations, almost 3 yr post outburst, demonstrate that it has now switched off. Swift J1112.2−8238 brings the total number of such events observed by Swift to three, interestingly all detected by Swift over a ∼3 month period (<3 per cent of its total lifetime as of 2015 March). While this suggests the possibility that further examples may be uncovered by detailed searches of the BAT archives, the lack of any prime candidates in the years since 2011 means these events are undoubtedly rare
Linked collectors and determiners for: Mycology herbarium, UiB.
No full textNatural history specimen data linked to collectors and determiners held within, "Mycology herbarium, UiB". Claims or attributions were made on Bionomia by volunteer Scribes, <a href="http://bionomia.net/dataset/41690f55-ccbe-48ba-8238-01173f657072">https://bionomia.net/dataset/41690f55-ccbe-48ba-8238-01173f657072</a> using specimen data from the dataset aggregated by the Global Biodiversity Information Facility, <a href="https://gbif.org/dataset/41690f55-ccbe-48ba-8238-01173f657072">https://gbif.org/dataset/41690f55-ccbe-48ba-8238-01173f657072</a>. Formatted as a Frictionless Data package
Linked collectors and determiners for: Mycology herbarium, UiB.
No full textNatural history specimen data linked to collectors and determiners held within, "Mycology herbarium, UiB". Claims or attributions were made on Bionomia by volunteer Scribes, <a href="http://bionomia.net/dataset/41690f55-ccbe-48ba-8238-01173f657072">https://bionomia.net/dataset/41690f55-ccbe-48ba-8238-01173f657072</a> using specimen data from the dataset aggregated by the Global Biodiversity Information Facility, <a href="https://gbif.org/dataset/41690f55-ccbe-48ba-8238-01173f657072">https://gbif.org/dataset/41690f55-ccbe-48ba-8238-01173f657072</a>. Formatted as a Frictionless Data package
Linked collectors and determiners for: Family Primulaceae in Digital Herbaria of CSBG SB RAS (NSK).
No full textNatural history specimen data linked to collectors and determiners held within, "Family Primulaceae in Digital Herbaria of CSBG SB RAS (NSK)". Claims or attributions were made on Bionomia by volunteer Scribes, <a href="http://bionomia.net/dataset/769dbaf7-8238-43fa-9717-90973e41706d">https://bionomia.net/dataset/769dbaf7-8238-43fa-9717-90973e41706d</a> using specimen data from the dataset aggregated by the Global Biodiversity Information Facility, <a href="https://gbif.org/dataset/769dbaf7-8238-43fa-9717-90973e41706d">https://gbif.org/dataset/769dbaf7-8238-43fa-9717-90973e41706d</a>. Formatted as a Frictionless Data package
Linked collectors and determiners for: Family Primulaceae in Digital Herbaria of CSBG SB RAS (NSK).
No full textNatural history specimen data linked to collectors and determiners held within, "Family Primulaceae in Digital Herbaria of CSBG SB RAS (NSK)". Claims or attributions were made on Bionomia by volunteer Scribes, <a href="http://bionomia.net/dataset/769dbaf7-8238-43fa-9717-90973e41706d">https://bionomia.net/dataset/769dbaf7-8238-43fa-9717-90973e41706d</a> using specimen data from the dataset aggregated by the Global Biodiversity Information Facility, <a href="https://gbif.org/dataset/769dbaf7-8238-43fa-9717-90973e41706d">https://gbif.org/dataset/769dbaf7-8238-43fa-9717-90973e41706d</a>. Formatted as a Frictionless Data package
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