ON 246 multiwavelength SED

Also known as 1FGL J1230.4+2520, 1FLAT J123014.1+251807, 1OUNYU J123014+2518.0, 2FGL J1230.2+2517, 2WHSP J123013.9+251806, 3FGL J1230.3+2519, 3HSP J123014.1+251807, 5BZB J1230+2518, BZB J1230+2518, CRATES J123015+251823, RX J12302+2517, RXS J12302+2517, S3 1227+25.

• Class: BL Lac
• Redshift: z = 0.140
• Position (ICRS): RA 187.55871°, Dec 25.30198°
• Data: 4,340 points (59 upper limits) from 43 catalogues
• Dated data: 2008–2024 (MJD 54698–60610)
• Undated catalogue values: 106
• Frequency range of detections: log ν = 8.2–26.2 [Hz] (radio, microwave, infrared, optical, X-ray, γ-ray)
• Swift measurements analysed by MMDC: 61 XRT
• Largest catalogues (points): ZTF (1,871), ASAS-SN (948), NEOWISE (597), MMDCGR (323), MMDCXRT (261)

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=187.55871, dec=25.30198, name="ON 246")

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

Other BL Lac objects

• MS 1221.8+2452
• TXS 1221+229
• B2 1229+29
• W Comae
• PG 1218+304
• B2 1215+30

How to cite

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