B2 2308+34 multiwavelength SED

Also known as 1FGL J2311.0+3425, 1FLAT J231105.3+342510, 1OUNYU J231105+3425.1, 2FGL J2311.0+3425, 3FGL J2311.0+3425, 5BZQ J2311+3425, BZQ J2311+3425, CRATES J231104+342504, TXS 2308+341.

• Class: FSRQ
• Redshift: z = 1.818
• Position (ICRS): RA 347.77220°, Dec 34.41970°
• Data: 3,504 points (6 upper limits) from 38 catalogues
• Dated data: 2008–2025 (MJD 54714–60969)
• Undated catalogue values: 169
• Frequency range of detections: log ν = 7.9–25.2 [Hz] (radio, microwave, infrared, optical, ultraviolet, X-ray, γ-ray)
• Swift measurements analysed by MMDC: 52 UVOT and 20 XRT
• Largest catalogues (points): ZTF (2,695), MMDCGR (272), ASAS-SN (124), WISEME (100), PanSTARRS-LC (80)

Get the data

• The SED as CSV from the MMDC SED API (docs.mmdc.am).
• In Python, with astro-mmdc:

  from astro_mmdc import MMDC
  sed = MMDC().sed.get(ra=347.7722, dec=34.4197, name="B2 2308+34")

• The interactive SED plot, with time filtering and modeling (needs JavaScript).

Other FSRQs

• 4C +27.50
• B2 2234+28A
• S4 0003+38
• PKS 2246+208
• PKS 2223+21
• 4C +25.01

How to cite

Sahakyan, N., Vardanyan, V., Giommi, P., et al. 2024, AJ, 168, 289, doi:10.3847/1538-3881/ad8231 (arXiv:2410.01207).