4C +27.50 multiwavelength SED

Also known as 1FGL J2321.6+2726, 1FLAT J232159.8+273245, 1Jy 2319+272, 1OUNYU J232160+2732.7, 2FGL J2321.0+2737, 3FGL J2321.9+2732, 5BZQ J2321+2732, B22319+27, BZQ J2321+2732, CRATES J232200+273256, TXS 2319+272.

• Class: FSRQ
• Redshift: z = 1.253
• Position (ICRS): RA 350.49943°, Dec 27.54623°
• Data: 5,499 points (58 upper limits) from 40 catalogues
• Dated data: 2008–2024 (MJD 54815–60609)
• Undated catalogue values: 111
• Frequency range of detections: log ν = 7.9–25.4 [Hz] (radio, microwave, infrared, optical, ultraviolet, X-ray, γ-ray)
• Swift measurements analysed by MMDC: 290 UVOT and 129 XRT
• Largest catalogues (points): ZTF (2,375), ASAS-SN (1,823), NEOWISE (670), MMDCGR (234), PanSTARRS-LC (113)

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=350.49943, dec=27.54623, name="4C +27.50")

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

Other FSRQs

• B2 2308+34
• PKS 2246+208
• B2 2234+28A
• 4C +25.01
• 3C 454.3
• S4 0003+38

How to cite

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