研究目的
Monitoring the optical ?ux, polarization and the gamma-ray ?ux of 1H 0323+342 to demonstrate the reality of microvariability events with durations as short as ~15 min for this object.
研究成果
We have, for the ?rst time, demonstrated the reality of microvariability events for 1H 0323+342 with an amplitude of ~0.05 mag. We have reported the ?rst long term monitoring of the optical ?ux and polarization and the gamma-ray ?ux for this vRL NLSy1 galaxy. Although this object exhibited more than 1.0 mag variation during this monitoring program, no strong correlation was found between the optical and gamma-ray ?ux variations.
研究不足
The data sampling may be too sparse to fully address the question of correlation between the optical and gamma-ray ?ux variations.
1：Experimental Design and Method Selection:
Optical photometric observations were obtained using the 31” NURO, 42” Hall, and 72” Perkins telescopes at Lowell Observatory in Flagstaff, Arizona. R-band magnitudes were derived via aperture photometry of in-?eld comparison stars. Optical polarimetric data were obtained using the 72” telescope at Lowell Observatory, equipped with the PRISM instrument. Gamma-ray data were obtained through the Fermi public data server, and were collected using the Large Area Telescope (LAT).
2：Sample Selection and Data Sources:
The comparison stars were selected for their photometric stability. Gamma-ray data were collected over the entirety of the Fermi-LAT mission lifetime.
3：List of Experimental Equipment and Materials:
31” NURO, 42” Hall, and 72” Perkins telescopes, PRISM instrument, Fermi-LAT.
4：Experimental Procedures and Operational Workflow:
Observations were obtained during several different observing runs between November 2010 and March
5：The data were reduced and analyzed using ScienceTools v9r33p0 and instrument response functions P7REP_SOURCE_VData Analysis Methods:
20 The data were binned in 30.5 day increments, and a likelihood analysis was performed on each bin. A cross correlation analysis of the light curves was performed.
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