Optical Spectral Variations of a Large Sample of Fermi Blazars
We have investigated the optical spectral behavior of a large sample of Fermi blazars (40 flat-spectrum radio quasars (FSRQs) and 13 BL Lacertae objects (BL Lacs)), and found two new universal optical spectral behaviors. In the low state the optical spectrum gradually becomes softer (steeper) or har...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
American Astronomical Society
2022
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| Online Access: | View Fulltext in Publisher |