S5 1803+784 multiwavelength SED

Also known as 1FGL J1800.4+7827, 1Jy 1803+784, 1OUNYU J180046+7828.0, 2FGL J1800.5+7829, 2FHL J1801.2+7828, 3FGL J1800.5+7827, 4FGL J1800.6+7828, 5BZB J1800+7828, BZB J1800+7828, CRATES J180045+782804, IRASF18036+7827, S51803+78, WMAP5 J1800+7827, WMAP72.

• Class: BL Lac
• Redshift: z = 0.680
• Position (ICRS): RA 270.19035°, Dec 78.46778°
• Data: 7,338 points (7 upper limits) from 44 catalogues
• Dated data: 1998–2025 (MJD 51084–60969)
• Undated catalogue values: 883
• Frequency range of detections: log ν = 8.2–26.2 [Hz] (radio, microwave, infrared, optical, ultraviolet, X-ray, γ-ray)
• Swift measurements analysed by MMDC: 294 UVOT and 348 XRT
• Largest catalogues (points): ZTF (2,436), ASAS-SN (1,786), SUFST (685), MMDCGR (638), WISEME (584)

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=270.19035, dec=78.46778, name="S5 1803+784")

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

Other BL Lac objects

• S5 2007+77
• S4 1749+70
• 3C 371
• 1ES 1959+650
• S5 0454+84
• 1H 1515+660

How to cite

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