S4 0917+44 multiwavelength SED

Also known as 1FGL J0920.9+4441, 1OUNYU J092058+4441.9, 2FGL J0920.9+4441, 3FGL J0920.9+4442, 4FGL J0920.9+4441, 5BZQ J0920+4441, BZQ J0920+4441, CRATES J092058+444144, QSO B0917+449, ROXA J092058.3+444153.9, S40917+449, WMAP5 J0646+4449.

• Class: FSRQ
• Redshift: z = 2.188
• Position (ICRS): RA 140.24358°, Dec 44.69833°
• Data: 3,550 points (5 upper limits) from 35 catalogues
• Dated data: 2008–2025 (MJD 54701–60968)
• Undated catalogue values: 157
• 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: 34 UVOT and 30 XRT
• Largest catalogues (points): ZTF (2,571), ASAS-SN (375), MMDCGR (190), WISEME (88), PanSTARRS-LC (69)

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=140.24358, dec=44.69833, name="S4 0917+44")

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

Other FSRQs

• 4C +38.28
• 4C +40.24
• OK 492
• OJ 451
• 4C +39.23
• 4C +55.17

How to cite

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