The Simulation of Plane Measurement Points

Jiang, Yanming; Liu, Guixiong

doi:10.1007/978-3-642-28466-3_102

Cited by 2 publications

(2 citation statements)

References 5 publications

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“…J1222+0413 was observed with the Wide-field Infrared Survey Explorer (WISE) in four bands w1, w2, w3 and w4 centred at 3.4, 4.6, 12 and 24 µm, respectively. The variability flag in the WISE All-Sky Source Catalog var_flag of "9910" indicates that this source has a very high probability of being variable in the w1 and w2 bands (e.g., Jiang et al 2012).…”

Section: Rapid Infrared Variabilitymentioning

confidence: 99%

Identification of a new γ-ray-emitting narrow-line Seyfert 1 galaxy, at redshift ∼1

Yao

Yuan

Zhou

et al. 2015

Monthly Notices of the Royal Astronomical Society: Letters

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We report on the identification of a new γ-ray-emitting narrow-line Seyfert 1 (NLS1) galaxy, SDSS J122222.55+041315.7, which increases the number of known objects of this remarkable but rare type of active galactic nuclei (AGN) to seven. Its optical spectrum, obtained in the Sloan Digital Sky Survey-Baryon Oscillation Spectroscopic Survey, reveals a broad H β emission line with a width (FWHM) of 1734±104 km s −1 . This, along with strong optical Fe II multiplets [R 4570 = 0.9] and a weak [O III] λ 5007 emission line, makes the object a typical NLS1. On the other hand, the source exhibits a high radio brightness temperature, rapid infrared variability, and a flat X-ray spectrum extending up to ∼200 keV. It is associated with a luminous γ-ray source detected significantly with Fermi/LAT. Correlated variability with other wavebands has not yet been tested. The spectral energy distribution can be well modelled by a one-zone leptonic jet model. This new member is by far the most distant γ-rayemitting NLS1, at a redshift of z = 0.966.

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Section: Rapid Infrared Variabilitymentioning

confidence: 99%

Identification of a new γ-ray-emitting narrow-line Seyfert 1 galaxy, at redshift ∼1

Yao

Yuan

Zhou

et al. 2015

Monthly Notices of the Royal Astronomical Society: Letters

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“…Optical intra-day variability with a flux amplitude of about 10 per cent was reported for PKS 1502+036 by Paliya et al (2013). In infrared bands, a variation of 0.1-0.2 mag in 180 days was observed by the Wide-field Infrared Survey Explorer (Jiang et al 2012).…”

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confidence: 99%

The awakening of the γ-ray narrow-line Seyfert 1 galaxy PKS 1502+036

D’Ammando¹,

Orienti²,

Finke³

et al. 2016

Mon. Not. R. Astron. Soc.

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After a long low-activity period, a γ-ray flare from the narrow-line Seyfert 1 PKS 1502+036 (z = 0.4089) was detected by the Large Area Telescope (LAT) on board Fermi in 2015. On 2015 December 20 the source reached a daily peak flux, in the 0.1-300 GeV band, of (93 ± 19)×10 −8 ph cm −2 s −1 , attaining a flux of (237 ± 71)×10 −8 ph cm −2 s −1 on 3-hr time-scales, which corresponds to an isotropic luminosity of (7.3 ± 2.1)×10 47 erg s −1 . The γ-ray flare was not accompanied by significant spectral changes. We report on multi-wavelength radio-to-γ-ray observations of PKS 1502+036 during 2008 August-2016 March by Fermi-LAT, Swift, XMM-Newton, Catalina Real-Time Transient Survey, and the Owens Valley Radio Observatory (OVRO). An increase in activity was observed on 2015 December 22 by Swift in optical, UV, and X-rays. The OVRO 15 GHz light curve reached the highest flux density observed from this source on 2016 January 12, indicating a delay of about three weeks between the γ-ray and 15 GHz emission peaks. This suggests that the γ-ray emitting region is located beyond the broad line region. We compared the spectral energy distribution (SED) of an average activity state with that of the flaring state. The two SED, with the highenergy bump modelled as an external Compton component with seed photons from a dust torus, could be fitted by changing the electron distribution parameters as well as the magnetic field. The fit of the disc emission during the average state constrains the black hole mass to values lower than 10 8 M ⊙ . The SED, high-energy emission mechanisms, and γ-ray properties of the source resemble those of a flat spectrum radio quasar.

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The Simulation of Plane Measurement Points

Cited by 2 publications

References 5 publications

Identification of a new γ-ray-emitting narrow-line Seyfert 1 galaxy, at redshift ∼1

Identification of a new γ-ray-emitting narrow-line Seyfert 1 galaxy, at redshift ∼1

The awakening of the γ-ray narrow-line Seyfert 1 galaxy PKS 1502+036

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