EP-FXT 数据分析软件和标定数据库发布v2.0版本

2026年11月6日，EP-FXT 团队发布 FXT 数据分析软件 FXTSoft v2.0 和配套标定数据库 CALDB v2.0。此版本在 v1.30 的基础上，结合 FXT 在轨标定结果和科学分析需求进行了优化与更新。下载链接：https://epfxt.ihep.ac.cn/analysis。EP-FXT 团队将根据标定进展和用户反馈持续完善数据分析软件与标定数据库。

 

数据分析软件更新：

  1. 新增数据处理辅助工具

    • fxtsrcdet：源探测，提供多尺度小波和最大似然两种方法开展 FXT 点源探测，分别改编自 CIAO wavdetect 和 eROSITA/eSASS ermldet（含 erbox、erbackmap）的相关算法，在此感谢相关开发团队的工作和开源代码。

    • fxtobsmerge：数据产品合并，支持事例、图像、曝光图及兼容能谱与响应文件等合并。

    • fxtimage 和 fxtregmaskfill：图像处理与掩膜，支持图像生成、四则运算以及源区域掩膜构建与填充等。

    • fxtlccorr：光变曲线处理，支持源与本底光变曲线的缩放扣除及误差传播。

    • fxtbkgmap：生成仪器粒子本底图像。

    • fxttool-update 和 fxtcaldb-update：分别用于 Python 工具组件和 CALDB 的检查、更新及校验。

  2. 更新 fxtarfgen

    • 更新离轴（>3′）点源 PSF 修正模型（默认开启 psfcor=1）；

    • 新增支持复杂形状提取区域；

    • 新增支持基于合并数据的 ARF 提取（采用曝光与姿态加权处理）；

    • 新增支持均匀、高斯、beta 及图像模板等扩展源亮度模型（extend=1）。

 

标定数据库更新：

  1. 更新 E–C（能量–道数）标定：新增 CTI 修正后的残余能量偏差修正、不同事例等级（grade）间的能量修正，以及 FXT-B 加热后的 E–C 标定。

  2. 更新 RMF，改进低能平台成分和能量分辨率标定。

  3. 更新 ARF：新增独立的 ARFCORR 标定表，提供能量与时间相关的有效面积修正。

  4. 更新 PSF/EEF 模型，新增离轴模型参数表。

  5. 更新渐晕（vignetting）标定。

  6. 新增空白天区（blank-sky）观测数据。

 

本次 v2.0 为重要版本更新，涉及分析工具、响应计算和多项标定内容。请使用配套的软件与 CALDB，并在更新标定后重新生成相关的科学产品。

如在安装、运行或科学分析中发现问题，欢迎通过 EP Help Desk 或 epfxt@ihep.ac.cn 反馈，并尽可能附上软件及 CALDB 版本、观测编号、运行命令和相关日志。

 

 

Release of EP-FXT Data Analysis Software FXTSoft v2.0 and CALDB v2.0

 

On November 6, 2026, the EP-FXT team released the FXT data analysis software FXTSoft v2.0 and the matching calibration database CALDB v2.0. Building on v1.30, this release incorporates FXT in-orbit calibration results and scientific analysis requirements with comprehensive updates and improvements. Download link: https://epfxt.ihep.ac.cn/analysis. The EP-FXT team will continue to refine the data analysis software and calibration database based on calibration progress and user feedback.

 

Version 2.0 Updates:

 

Data Analysis Software Updates:

  1. New Data Analysis Tools

    • fxtsrcdet: Source detection providing both multiscale wavelet and maximum-likelihood methods for FXT point-source detection, adapted from the open-source CIAO wavdetect and eROSITA/eSASS erbox/erbackmap/ermldet implementations under the GNU GPL and applicable license terms; we acknowledge the CIAO and eSASS teams for making their software publicly available.

    • fxtobsmerge: Merging of data products, supporting event lists, images, exposure maps, and compatible spectra and response files.

    • fxtimage and fxtregmaskfill: Image processing and region masking, supporting image generation, image arithmetic, and source-mask construction and region filling.

    • fxtlccorr: Light-curve processing, supporting scaled background subtraction and error propagation for source and background light curves.

    • fxtbkgmap: Generation of instrumental particle-background maps.

    • fxttool-update and fxtcaldb-update: Checking, updating, and verifying the Python tools component and CALDB, respectively.

  2. Updates to fxtarfgen

    • Updated the off-axis (>3 arcmin) point-source PSF correction model (psfcor=1 by default);

    • Added support for complex extraction regions;

    • Added support for ARF extraction from merged data (with exposure and attitude weighting);

    • Added support for uniform, Gaussian, beta-profile, and image-template surface-brightness models for extended sources (extend=1).

 

Calibration Database Updates:

  1. Updated the energy–channel (E–C) calibration: added post-CTI residual energy-offset corrections, grade-dependent energy corrections, and post-heating E–C calibration for FXT-B.

  2. Updated the RMFs, including improvements to the low-energy shelf component and energy resolution.

  3. Updated the ARF calibration: added standalone ARFCORR calibration tables providing energy- and time-dependent effective-area corrections.

  4. Updated the PSF/EEF models and added off-axis model parameter tables.

  5. Updated the vignetting calibration.

  6. Added blank-sky observation data.

 

Version 2.0 is a major update involving analysis tools, response calculations, and multiple calibration items. Please use matching software and CALDB versions, and regenerate relevant scientific products after updating the calibration.

If you encounter any issues during installation, execution, or scientific analysis, please report them through the EP Help Desk or contact epfxt@ihep.ac.cn, and include the software and CALDB versions, observation ID, commands, and relevant logs where possible.