H 1426+428 multiwavelength SED

Names and position

Also known as 1ES 1426+428, 1FGL J1428.7+4239, 1FLAT J142832.6+424021, 2FGL J1428.6+4240, 2FHL J1428.5+4239, 2WHSP J142832.5+424020, 3FGL J1428.5+4240, 3HSP J142832.6+424021, 5BZB J1428+4240, BZB J1428+4240, SDSS J142832.60+424021.0.

• Class: BL Lac
• Redshift: z = 0.129
• Position (ICRS): RA 217.13587°, Dec 42.67251°
• Galactic: l 77.487°, b 64.899°

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

The SED

• Data: 18,060 points (27 upper limits) from 41 catalogues
• Dated data: 1999–2024 (MJD 51217–60656)
• Undated catalogue values: 477
• Frequency range of detections: log ν = 8.2–26.2 [Hz] (radio, microwave, infrared, optical, ultraviolet, X-ray, γ-ray)
• Swift measurements analysed by MMDC: 2,656 UVOT and 3,289 XRT
• Largest catalogues (points): XRTSPEC (5,088), MMDCXRT (4,564), ZTF (2,589), ASAS-SN (2,027), OULC (954)

Data by band

All 7 bands have data. The X-ray band has the most points, 11,043 of 18,060; its largest catalogue is XRTSPEC with 5,088.

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=217.13587, dec=42.67251, name="H 1426+428")

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

Nearby sources

• PG 1437+398, 3.7° away
• TXS 1422+373, 5.6° away
• B2 1436+37B, 5.8° away
• 87GB 135731.7+402612, 6.0° away

Other BL Lac objects

• 87GB 141615.9+355650
• B3 1323+415
• OQ 530
• RBS 1409
• SBS 1339+554
• SBS 1508+561

How to cite

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