OP 313 multiwavelength SED

OP 313 is a γ-ray source at redshift z = 0.996. Its MMDC SED has 5,324 points from 51 catalogues, with dated data from 2007–⁠2025. Download the SED as CSV.

Updated 29 October 2026.

Names and position

Also known as 1FGL J1310.6+3222, 1FLAT J131028.7+322043, 1Jy 1308+326, 1OUNYU J131029+3220.7, 2FGL J1310.6+3222, 3FGL J1310.6+3222, 5BZU J1310+3220, 7C 1308+3236, B21308+32, B21308+326, BZU J1310+3220, CRATES J131029+322051, TXS 1308+326, WMAP52, WMAP5 J1310+3222.

Redshift: z = 0.996
Position (ICRS): RA 197.61943°, Dec 32.34550°
Galactic: l 85.702°, b 83.346°

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

The SED

Data: 5,324 points (6 upper limits) from 51 catalogues
Dated data: 2007–2025 (MJD 54192–60889)
Undated catalogue values: 509
Frequency range of detections: log ν = 7.9–25.5 [Hz] (radio, microwave, infrared, optical, ultraviolet, X-ray, γ-ray)
Swift measurements analysed by MMDC: 1,348 UVOT and 735 XRT
Largest catalogues (points): ZTF (1,473), ASAS-SN (806), MMDCXRT_ORBIT (711), MMDCOUV (674), MMDCXRT (601)

Data by band

All 7 bands have data. The X-ray band has the most points, 1,753 of 5,324; its largest catalogue is MMDCXRT_ORBIT with 711.

Band	Points	Catalogues	Dated data
radio	70	12	undated
microwave	46	6	2013–2014
infrared	1,679	11	2009–2025
optical	1,515	4	2007–2025
ultraviolet	2	1	undated
X-ray	1,753	13	2007–2025
γ-ray	259	4	2008–2025

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=197.61943, dec=32.3455, name="OP 313")

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

Nearby sources

S4 1315+34, 2.6° away
5C 12.291, 3.5° away
Ton 116, 7.0° away
1ES 1255+244, 8.6° away

How to cite

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