4C +38.28 multiwavelength SED

Also known as 1FLAT J091648.9+385428, 2FGL J0917.0+3900, 3FGL J0916.3+3857, 5BZQ J0916+3854, B20913+39, BZQ J0916+3854, ROXA J091650.8+523833.7, S40913+391, TXS 0913+391.

• Class: FSRQ
• Redshift: z = 1.268
• Position (ICRS): RA 139.20377°, Dec 38.90782°
• Data: 2,400 points (14 upper limits) from 31 catalogues
• Dated data: 2010–2024 (MJD 55248–60610)
• Undated catalogue values: 87
• Frequency range of detections: log ν = 7.9–25.4 [Hz] (radio, microwave, infrared, optical, ultraviolet, X-ray, γ-ray)
• Largest catalogues (points): ZTF (1,449), NEOWISE (587), PanSTARRS-LC (141), WISEME (72), ASAS-SN (58)

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=139.20377, dec=38.90782, name="4C +38.28")

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

Other FSRQs

• S4 0917+44
• 4C +40.24
• OJ 451
• 4C +39.23
• B2 0920+28
• OK 492

How to cite

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