PKS 0235+164 multiwavelength SED

Names and position

Also known as 1FGL J0238.6+1637, 1FLAT J023838.9+163659, 1Jy 0235+164, 1OUNYU J023839+1636.9, 2FGL J0238.7+1637, 2FHL J0238.8+1631, 3FGL J0238.6+1636, 5BZB J0238+1636, AO0235+164, BZB J0238+1636, CRATES J023838+163704, PKS B0235+164, Q0235+164, TXS 0235+164, WMAP5 J0238+1637.

• Class: BL Lac
• Redshift: z = 0.940
• Position (ICRS): RA 39.66221°, Dec 16.61647°
• Galactic: l 156.771°, b −39.109°

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

The SED

• Data: 8,034 points (8 upper limits) from 47 catalogues
• Dated data: 1999–2025 (MJD 51206–60968)
• Undated catalogue values: 2,500
• Frequency range of detections: log ν = 7.9–25.4 [Hz] (radio, microwave, infrared, optical, ultraviolet, X-ray, γ-ray)
• Swift measurements analysed by MMDC: 1,986 UVOT and 768 XRT
• Largest catalogues (points): SMARTS (1,084), SUFST (1,007), MMDCOUV (993), ZTF (876), MMDCXRT_ORBIT (747)

Data by band

All 7 bands have data. The X-ray band has the most points, 2,856 of 8,034; its largest catalogue is SUFST with 1,007.

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=39.66221, dec=16.61647, name="PKS 0235+164")

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

Nearby sources

• 4C +13.14, 3.6° away
• TXS 0222+185, 3.9° away
• 1ES 0229+200, 3.9° away
• 1E 0317.0+1835, 10.0° away

Other BL Lac objects

• B2 0201+24
• TXS 0159+085
• 1H 0323+022
• MS 0158.5+0019
• MS 0205.7+3509
• S2 0109+22

How to cite

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