| Canonical Name: | PGC 2402248 |
| TeVCat Name: | TeV J0733+517 |
| Other Names: | 2WHSP J073326.7+515354
3FGL J0733.5+5153 |
| Source Type: | HBL |
| R.A.: | 07 33 26.7 (hh mm ss) |
| Dec.: | +51 53 53.9 (dd mm ss) |
| Gal Long: | 166.00 (deg) |
| Gal Lat: | 27.32 (deg) |
| Distance: | z=0.065 |
| Flux: | 0.01 (Crab Units) |
| Energy Threshold: | 200 GeV |
| Spectral Index: | 2.41 |
| Extended: | No |
| Discovery Date: | 2018-04 |
| Discovered By: | MAGIC |
| TeVCat SubCat: | Default Catalog |
Source Notes:
This detection was announced by MAGIC in an
ATel on 19 April 2018. The
blazar is part of the 2WHSP catalog (
Chang et al., 2017), a catalog of
high synchrotron peaked blazars. With log(peak_freq) of 17.9, its peak
frequency is towards the highest energy of the blazars listed in the
catalog. It is classified as an extreme high-energy peaked BL Lac object.
Source Position:
From
Chang et al. (2017)
No positional uncertainty is reported since this is not a position
measured using VHE gamma rays.
- R.A. (J2000): 113.3612 deg = 07h 33m 26.7s
- Dec. (J2000): +51.8983 deg = +51d 53' 53.9''
Distance:
At the time of its detection, the redshift of this blazar was unknown.
From
Becerra Gonzalez et al. (2018):
- the redshift has been determined to be: z = 0.065:
... "We obtained a high-SNR spectrum with the 10.4m GTC telescope within
the DDT proposal GTC2018-099, to investigate weak spectral features
from a low-SNR spectrum obtained previously from the 2.5m INT
telescope. The observations were carried out on 02/05/2018 with OSIRIS
in longslit configuration and grism R1000B, covering the wavelength
range from 3650 to 7700 A. The redshift of PGC 2402248 was measured as
z=0.065, derived from the identification of several spectral features:
CaII doublet, G-band, MgI and NaD."
Flux:
From
Mirzoyan et al. (2018):
- the VHE integral flux above 200 GeV corresponds to approximately 1%
that of the flux from the Crab Nebula above the same energy threshold
Spectral Information:
From
MAGIC Collaboration (2019):
The spectrum of the source was reconstructed between 0.1 and 8 TeV:
- Flux normalisation at 200 GeV: (1.95 ± 0.10stat) x 10e-11 ph cm-2 s-1 TeV-1
- Spectral index (observed): 2.41 +/- 0.17
- Spectral index (intrinsic): 1.99 +/- 0.16 (absorbed using model of
Dominguez et al. 2011
- Integral flux > 200 GeV: 22.5 +/- 0.60 x 10e-13 ph cm-2 s-1
From
Fallah Ramazani et al. (2019):
- dF/dE = F_0 (E/r)^-a
- spectral index, a, (observed): 2.41 +/- 0.17
- F_0: 1.95 +/- 0.10 x10e-11 cm-2 s-1 TeV-1
- r: 0.2 TeV
Seen by: MAGIC
-
Absorption features in sub-TeV gamma-ray spectra of BL Lac objects
Foffano, L. et al., arXiv e-prints parXiv:2201.02454 (2022) [LINK]
-
Optical spectral characterization of the the TeV extreme blazar 2WHSP J073326.7+515354
Becerra Gonzalez, J. et al., arXiv e-prints parXiv:2004.11359 (2020) [LINK]
-
Optical spectral characterization of the the TeV extreme blazar 2WHSP J073326.7+515354
Becerra Gonzalez, J. et al., MNRAS p (2020) [LINK]
-
Testing emission models on the extreme blazar 2WHSP J073326.7+515354 detected at very high energies with the MAGIC telescopes
MAGIC Collaboration et al., arXiv e-prints parXiv:1909.11621 (2019) [LINK]
-
Testing Blazar Emission Models on the Extreme Blazar PGC 2402248, Newly Discovered at Very-high-energies with the MAGIC Telescopes
Foffano, L. et al., 36th International Cosmic Ray Conference (ICRC2019) 36 p677 (2019) [LINK]
-
First detection of very-high-energy gamma-ray emission from the extreme blazar PGC 2402248 with the MAGIC telescopes
Mirzoyan, R. on behalf of the MAGIC Collaboration, The Astronomer's Telegram 11548 p1 (2018) [LINK]
-
Redshift determination of the very high energy gamma-ray extreme blazar PGC 2402248
Beccerra Gonzalez, J. et al., The Astronomer's Telegram 11621 p1 (2018) [LINK]
-
2WHSP: A multi-frequency selected catalogue of high energy and very high energy gamma-ray blazars and blazar candidates
Chang, Y.-L. et al., A&A 598 pA17 (2017) [LINK]
-
All the MAGIC of extreme blazars
Fallah Ramanzani, V. et al. for the MAGIC Collaboration, Proc. eXtreme 19 [LINK]
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