Mrk 180 multiwavelength SED

Mrk 180 is a BL Lac object at redshift z = 0.045. Its MMDC SED has 6,764 points from 41 catalogues, with dated data from 1996–⁠2024. Download the SED as CSV.

Updated 29 October 2026.

Names and position

Also known as 1FGL J1136.6+7009, 1FLAT J113626.3+700925, 1OUNYU J113626+7009.4, 2FGL J1136.7+7009, 2FHL J1136.5+7009, 2WHSP J113626.4+700926, 3FGL J1136.6+7009, 3HSP J113626.4+700927, 5BZB J1136+7009, BZB J1136+7009, CRATES J113626+700931, Markarian 180, Mkn 180, S51133+704.

Class: BL Lac
Redshift: z = 0.045
Position (ICRS): RA 174.11004°, Dec 70.15759°
Galactic: l 131.910°, b 45.641°

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

The SED

Data: 6,764 points (6 upper limits) from 41 catalogues
Dated data: 1996–2024 (MJD 50427–60609)
Undated catalogue values: 220
Frequency range of detections: log ν = 7.9–26.5 [Hz] (radio, microwave, infrared, optical, ultraviolet, X-ray, γ-ray)
Swift measurements analysed by MMDC: 356 UVOT and 404 XRT
Largest catalogues (points): ASAS-SN (2,279), ZTF (1,934), NEOWISE (972), MMDCXRT (855), MMDCOUV (193)

Data by band

All 7 bands have data. The infrared band has the most points, 3,102 of 6,764; its largest catalogue is ZTF with 1,934.

Band	Points	Catalogues	Dated data
radio	25	5	undated
microwave	4	4	undated
infrared	3,102	8	2010–2024
optical	2,577	5	2005–2024
ultraviolet	3	2	undated
X-ray	980	10	1996–2019
γ-ray	73	7	2008–2022

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=174.11004, dec=70.15759, name="Mrk 180")

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

Nearby sources

S5 1217+71, 3.7° away
MS 1229.2+6430, 7.9° away
1H 1241+626, 9.4° away
SBS 1200+608, 10.0° away

Other BL Lac objects

How to cite

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