OJ 287 multiwavelength SED

Names and position

Also known as 1FGL J0854.8+2006, 1FLAT J085448.9+200630, 1Jy 0851+202, 2FGL J0854.8+2005, 3FGL J0854.8+2006, 5BZB J0854+2006, BZB J0854+2006, CRATES J085448+200647, PG 0851+202, PKS 0851+202, PKS B0851+202, QSO B0851+202, SDSS J085448.87+200630.7, TXS 0851+202, WMAP115, WMAP5 J0019+2020.

• Class: BL Lac
• Redshift: z = 0.306
• Position (ICRS): RA 133.70365°, Dec 20.10851°
• Galactic: l 206.812°, b 35.821°

Other names and measurements: NED and SIMBAD within 5″ of this position.

The SED

• Data: 31,448 points (3 upper limits) from 55 catalogues
• Dated data: 1997–2025 (MJD 50776–60968)
• Undated catalogue values: 7,849
• Frequency range of detections: log ν = 7.9–26.2 [Hz] (radio, microwave, infrared, optical, ultraviolet, X-ray, γ-ray)
• Swift measurements analysed by MMDC: 530 UVOT and 5,117 XRT
• Largest catalogues (points): ASAS-SN (10,774), SUFST (5,020), MMDCXRT_ORBIT (4,707), MMDCXRT (4,262), SMARTS (2,262)

Data by band

All 7 bands have data. The X-ray band has the most points, 15,274 of 31,448; its largest catalogue is SUFST with 5,020.

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=133.70365, dec=20.10851, name="OJ 287")

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

Nearby sources

• OJ 259, 6.2° away
• TXS 0826+180, 6.5° away
• S3 0827+24, 6.9° away
• B2 0920+28, 10.5° away

Other BL Lac objects

• Ton 0396
• B2 0906+31
• Ton 1015
• PKS 0829+046
• PKS 0754+100
• B2 0806+35

How to cite

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