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Observation Date (UT) Observation Lat

Canonical Name:1ES 2037+521
TeVCat Name:TeV J2039+523
Other Names:
Source Type:HBL
R.A.:20 39 23.5 (hh mm ss)
Dec.:+52 19 50 (dd mm ss)
Gal Long: 89.69 (deg)
Gal Lat: 6.55 (deg)
Distance: z=0.053
Flux:0.03 (Crab Units)
Energy Threshold:200 GeV
Spectral Index:
Discovery Date:2016-10
Discovered By: MAGIC
TeVCat SubCat:Default Catalog

Source Notes:

This source was moved to the Default Catalogue on 191118.
This source was announced in an ATel on 161001

Source Position:
From Mirzoyan et al.:
- the position reported is identical to that given in NED
R.A. (J2000): 20h39m23.5s
Dec. (J2000): +52d19m50s

From Mirzoyan et al.:
- the flux above 200 GeV is approx. 3% of the Crab Nebula flux

Spectral Properties:
From MAGIC Collaboration (2019):
The data were fit with a simple power-law spectrum of the form:
- dN/dE = F0 x (E/E0)^-A
- F0: 5.6 +/- 0.6 x10e-12 cm-2 s-1
- A: 2.3 +/- 0.2
- E0: 400 GeV
The integral flux above 300 GeV is 1.8 +/- 0.4 x10e-12 cm-2 s-1

- the redshift of z = 0.053 comes from Nilsson et al (2003)

From Mirzoyan et al.:
- "Its X-ray and gamma-ray spectra is hard, which suggest this source
may be an extreme HBL"
From Veron-Cetti & Veron (2006):
- this object is classified as a BL Lac

Seen by: MAGIC
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