The Flat Spectrum Radio Quasar OP~313 entered an enhanced activity phase in November 2023 and has undergone multiple flares since then which have motivated the organisation of several large multi-wavelength campaigns, including two deep observations from the hard X-ray telescope NuSTAR. The broadband emission from OP~313 during these two observations is investigated under a new unified analysis framework, with data spanning from optical to gamma rays. Traditional methods for analyzing blazar emissions often rely on proprietary software tailored to specific instruments, making it challenging to integrate and interpret data from multi-wavelength campaigns comprehensively. This study demonstrates the feasibility of utilizing gammapy, an open-source Python package, and common data formats originally developed for gamma-ray instrumentation, to perform a consistent multi-instrument analysis. This enables a forward folding approach that fully incorporates source observations, detector responses, and various instrumental and astrophysical backgrounds. The methodology is applied as an example to recent data collected from the distant quasar OP~313. We present a comprehensive data reconstruction and analysis for instruments including the Liverpool Telescope's IO:O detector, Swift-UVOT, Swift-XRT, NuSTAR, and Fermi-LAT. The resulting spectral analysis is validated against the native tools for each instrument. Additionally, a multi-wavelength phenomenological model of the source emission, encompassing optical to gamma-ray bands, is developed, incorporating absorption components across different energy regimes. We introduce and validate a new unified framework for multi-wavelength forward folding data analysis based on gammapy and open data formats, demonstrating its application to spectral data from the quasar OP~313.
Jet Power Estimates of FSRQs PKS 1441+25 and Ton 599 from Broadband SED Modeling
Tezpur University（特佐普尔大学）；Inter-University Centre for Astronomy and Astrophysics（大学间天文与天体物理中心）；Centre for Space Research, North-West University（西北大学空间研究中心）
Modelling the Time-variable Broadband Emission and Correlation Study of FSRQ S5 1044+71
University of Kashmir（克什米尔大学）；Central University of Kashmir（克什米尔中央大学）；Bhabha Atomic Research Centre（巴哈原子研究中心）；Homi Bhabha National Institute（霍米·巴巴国家研究所）；National Institute of Technology, Srinagar（斯利那加国立技术学院）；Indian Institute of Astrophysics（印度天体物理研究所）
Quasi-Simultaneous Broadband Spectral Energy Distributions of a Sample of Fermi Blazars -- I. Correlation Results
Zhejiang Normal University（浙江师范大学）；Purple Mountain Observatory, Chinese Academy of Sciences（中国科学院紫金山天文台）；University of Science and Technology of China（中国科学技术大学）；Shanghai Normal University（上海师范大学）；Yunnan Observatories, Chinese Academy of Sciences（中国科学院云南天文台）；Center for Astronomical Mega-Science, Chinese Academy of Sciences（中国科学院国家天文台）；College of Physics and Electronic Engineering, Qilu Normal University（齐鲁师范学院物理与电子工程学院）
Exploring the Transitional Parameter Space of Blazars using Gamma-ray and X-ray Population Diagnostics
本文通过第四次费米LAT源目录数据释放4（4FGL-DR4）和Living Swift XRT点源目录中的X射线信息，研究了变光BL Lac对象（CLBs）的伽马射线和X射线群体特性，发现CLBs在伽马射线参数空间中主要位于BLL和FSRQ群体的中间和重叠区域，但在不同参数平面上的质心位置以及PCA和UMAP投影显示CLBs更接近FSRQ区域，X射线分析也显示CLBs在X射线参数空间中更接近FSRQs而非BLLs，且X射线/伽马射线耦合关系和随机森林分类概率与这一趋势一致。
The broadband spectral energy distribution of candidate neutrino blazars
CHRIST (Deemed to be University)（克里斯特大学）；North-West University（西北大学）；Indian Institute of Astrophysics（印度天体物理研究所）；Bhabha Atomic Research Centre（巴哈原子研究中心）；Homi Bhabha National Institute（霍米·巴巴国立研究所）
VHE gamma-ray detection of FSRQ QSO B1420+326 and modeling of its enhanced broadband state in 2020
上下文类星体B1420+326是一颗耀变体，被归类为平谱射电类星体（Flat Spectrum Radio Quasar，FSRQ）。在2020年初，它经历了一个增强的通量状态。广泛的多波长活动使我们能够追踪耀斑的演变。目的。我们寻找类星体B1420+326在此耀斑状态下的VHE γ射线辐射。我们的目标是在耀斑的不同阶段的宽带发射源的特征和模型。方法.用无线电、近红外、光学（包括偏振测量和光谱学）、紫外、X射线和伽马射线波段的一些仪器观测了该辐射源。我们使用专用的光谱学结果来估计的吸积盘和尘埃环光度。我们进行光谱能量分布建模的框架下，结合同步自康普顿和外部康普顿的情况下，电子能量分布的加速和冷却过程中的部分决定。结果在增强态期间，两个SED分量的通量急剧增加，并且峰向更高的能量移动。MAGIC望远镜的后续观测导致检测到来自该源的非常高能量的伽马射线发射，使其成为该能量范围内已知的少数几个FSRQ之一。建模使我们能够约束的磁场和电子能量分布在发射区的演变。在低偏振态期间，伽马射线耀斑伴随着光学偏振矢量的旋转。此外，一个新的超光速无线电结同时出现在喷流的无线电图像中。的光学光谱示出了一个突出的FeII凸点与通量一起演变的连续发射和不同的等效宽度的MgII线。
Fast Optical Variability of the TeV Blazar PKS 1725+123 Observed by SVOM-VT and Insights from Multi-wavelength Follow-up Observations
Beijing Institute of Technology（北京理工大学）；Université Paris Cite, CNRS, Astroparticule et Cosmologie（巴黎西岱大学）；National Astronomical Observatories, Chinese Academy of Sciences（中国科学院国家天文台）；Guangxi Key Laboratory for Relativistic Astrophysics, School of Physical Science and Technology, Guangxi University（广西大学物理科学与技术学院）
Detection of the distant quasar OP 313 with the first Large-Sized Telescope of CTAO
Tokai University（东海大学）；University of Tokyo（东京大学）；ETH Zürich（苏黎世联邦理工学院）；Università degli Studi di Siena（锡耶纳大学）；The Barcelona Institute of Science and Technology（巴塞罗那科学技术研究所）；Université Paris-Saclay（巴黎萨克雷大学）；Université Paris Cité（巴黎西岱大学）；Universitat de Barcelona（巴塞罗那大学）；University of Geneva（日内瓦大学）
基于LST-1和MAGIC数据，研究FSRQ OP 313在2013年12月耀发期间的甚高能γ射线发射，并利用多波段观测构建宽带能谱，通过双区轻子模型解释其辐射机制，同时评估河外背景光对VHE光子的衰减。
