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Observation Date (UT) Observation Lat

Canonical Name:MAGIC J2001+435
TeVCat Name:TeV J2001+438
Other Names:1FGL J2001.1+4351
MG4 J200112+4352
Source Type:IBL
R.A.:20 01 13.5 (hh mm ss)
Dec.:+43 53 02.8 (dd mm ss)
Gal Long: 79.07 (deg)
Gal Lat: 7.11 (deg)
Flux:0.22 (Crab Units)
Energy Threshold:90 GeV
Spectral Index:
Discovery Date:2010-07
Discovered By: MAGIC
TeVCat SubCat:Newly Announced

Source Notes:

Source position and its uncertainty:
From Mariotti et al. 2010:
- R.A. (J2000): 20 01 13.5
- Dec. (J2000): 43 53 02.8
- no uncertainty on the source position is given
From Berger et al. (2011):
- R.A. (J2000): 300.304 (=20h 01m 12.96s)
- Dec. (J2000): +43.886 (=+43d 53m 09.6s)
- no uncertainty on the source position is given

Source Association:
From Mariotti et al. 2010:
- the source is associated with 1FGL J2001.1+4351,
which is located at R.A. 20 01 11.9, Dec. +43 51 51 (J2000)
- it is also associated with MG4 J200112+4352 (RA 20 01 12.9,
dec 43 52 52.8, J2000), which has been identified
as a BL Lac by Bassani et al. (2009)

From Mariotti et al. 2010:
- ~20% of the Crab nebula flux above 100 GeV
From Berger et al. (2011):
- 22% of the Crab Nebula flux above 90 GeV

From Berger et al. (2011):
- "MAGIC observed 1FGL J2001.1+4351 from July until September 2010. Only
one night, July 16th, showed a significant excess of 7.6 sigma (pre-trial)."

Initially, this source was classified as a HBL in TeVCat. It has
been updated (121113) to an IBL based on its classification in
the Fermi 2nd AGN Catalog (Ackermann et al. 2012)

Seen by: MAGIC
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