1ES 0229+200 multiwavelength SED

Names and position

Also known as 1FLAT J023248.6+201717, 1OUNYU J023249+2017.2, 2WHSP J023248.5+201717, 3FGL J0232.8+2016, 3HSP J023248.6+201717, 5BZG J0232+2017.

• Class: BL Lac
• Redshift: z = 0.139
• Position (ICRS): RA 38.20256°, Dec 20.28819°
• Galactic: l 152.941°, b −36.607°

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

The SED

• Data: 7,938 points (26 upper limits) from 43 catalogues
• Dated data: 2008–2025 (MJD 54683–60748)
• Undated catalogue values: 163
• Frequency range of detections: log ν = 7.9–27.3 [Hz] (radio, microwave, infrared, optical, ultraviolet, X-ray, γ-ray)
• Swift measurements analysed by MMDC: 1,166 UVOT and 1,792 XRT
• Largest catalogues (points): MMDCXRT (1,839), XRTSPEC (1,508), ZTF (1,348), ASAS-SN (952), NEOWISE (514)

Data by band

All 7 bands have data. The X-ray band has the most points, 4,374 of 7,938; its largest catalogue is MMDCXRT with 1,839.

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=38.20256, dec=20.28819, name="1ES 0229+200")

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

Nearby sources

• TXS 0222+185, 2.4° away
• PKS 0235+164, 3.9° away
• 4C +13.14, 6.9° away
• B2 0201+24, 7.7° away

Other BL Lac objects

• 1E 0317.0+1835
• TXS 0159+085
• MS 0205.7+3509
• S2 0109+22
• 1ES 0120+340
• MS 0158.5+0019

How to cite

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