| Canonical Name: | H 1426+428 |
| TeVCat Name: | TeV J1428+426 |
| Other Names: | 1ES 1426+428, 1H 1430+423 |
| Source Type: | HBL |
| R.A.: | 14 28 32.6 (hh mm ss) |
| Dec.: | +42 40 21 (dd mm ss) |
| Gal Long: | 77.49 (deg) |
| Gal Lat: | 64.90 (deg) |
| Distance: | z=0.129 |
| Flux: | 0.03 (Crab Units) |
| Energy Threshold: | 2500 GeV |
| Spectral Index: | 3.5 |
| Extended: | No |
| Discovery Date: | 2002-02 |
| Discovered By: | Whipple |
| TeVCat SubCat: | Default Catalog |
Source Notes:
Source position and its uncertainty:
The position from
NED is quoted here
From
Horan et al. 2002:
- RA (J2000): 14h 28m 32.7s
- Dec (J2000): +42 40' 20''
- No positional uncertainty is quoted
From
Aharonian et al. (2002):
- No position is quoted
- Uncertainty in position: 5''(stat), 25''(syst)
Flux:
The flux from H 1426 has been found to be variable:
From
Petry et al. (2002):
- a flux of 3% of the Crab Nebula above 2.5 TeV was reported
From
Aharonian et al. (2002):
- a flux of 10% of the Crab Nebula above 1 TeV was reported
From
Djannati-Atai et al. (2002):
- a mean flux of 18% of the Crab Nebula above 250 GeV was reported
- maximum flux values of 80% and 60% of the Crab were reported
Seen by: Whipple, HEGRA, Crimea, CAT, MAGIC, VERITAS
-
X-ray Intraday Variability of HBL Blazars with XMM-Newton
Devanand, P.U. et al., arXiv e-prints parXiv:2209.05515 (2022) [LINK]
-
VERITAS detection of an elevated VHE flux from the blazar H 1426+428
Quinn, J. for the VERITAS Collaboration, The Astronomer's Telegram 14501 p1 (2021) [LINK]
-
Recent Results from VERITAS AGN Observations
Benbow, Wystan on behalf of the VERITAS Collaboration, arXiv e-prints parXiv:2108.05460 (2021) [LINK]
-
Progress in unveiling extreme particle acceleration in persistent astrophysical jets
Biteau, Jonathan et al., arXiv e-prints parXiv:2001.09222 (2020) [LINK]
-
New hard-TeV extreme blazars detected with the MAGIC telescopes
MAGIC Collaboration et al., arXiv e-prints parXiv:1911.06680 (2019) [LINK]
-
MAGIC eyes to the extreme: testing the blazar emission models on EHBLs
Prandini, E. et al., 36th International Cosmic Ray Conference (ICRC2019) 36 p768 (2019) [LINK]
-
X-ray spectral variability of blazars using principal component analysis
Gallant, D. et al., ArXiv e-prints p (2018) [LINK]
-
Probing the IGMF with the next generation Cherenkov telescopes
Fernandez Alonso, M. et al., ArXiv e-prints p (2018) [LINK]
-
Long-term optical monitoring of TeV emitting blazars. I. Data analysis
Nilsson, K. et al., A&A 620 pA185 (2018) [LINK]
-
Search for Magnetically Broadened Cascade Emission From Blazars with VERITAS
VERITAS Collaboration et al., ArXiv e-prints p (2017) [LINK]
-
The Stability of BVRI Comparison Stars Near Selected TeV Blazars
Pace, C.J. et al., ArXiv e-prints p (2013) [LINK]
-
Two-year observations of the blazar H1426 + 428 with the GT-48 atmospheric Cherenkov telescope
Fidelis, V.V., Astrophysics 55 p226-230 (2012) [LINK]
-
Very high-energy observations of the two high-frequency peaked BL Lac objects 1ES 1218 + 304 and H 1426 + 428
Mueller, C. et al., Astroparticle Physics 34 p674-678 (2011) [LINK]
-
Rapid optical variability of TeV blazars
Gopal-Krishna et al., ArXiv e-prints p (2011) [LINK]
-
TeV Gamma-Ray Observations of Mrk421 and H1426+428 with TACTIC Imaging Telescope
Yadav, K., ArXiv e-prints p (2011) [LINK]
-
Highlights of the VERITAS Blazar Observation Program
Wystan Benbow for the VERITAS Collaboration, ArXiv e-prints p (2011) [LINK]
-
Detection of Intra-day Variability Timescales of Four High Energy Peaked Blazars with XMM-Newton
Gaur, H. et al., ArXiv e-prints p (2010) [LINK]
-
The Jets of TeV Blazars at Higher Resolution: 43 GHz and Polarimetric VLBA Observations from 2005 to 2009
Piner, B.G. et al., ApJ 723 p1150-1167 (2010) [LINK]
-
Search for TeV Gamma-rays from H1426+428 during 2004-07 with the TACTIC telescope
Yadav, K.K. et al., ArXiv e-prints p (2009) [LINK]
-
Multiwavelength observation of the blazar 1ES1426+428 in May-June 2008
Leonardo, E. et al., ArXiv e-prints p (2009) [LINK]
-
X-ray spectral evolution of TeV BL Lacertae objects: eleven years of observations with BeppoSAX, XMM-Newton and Swift satellites
Massaro, F. et al., A&A 478 p395-401 (2008) [LINK]
-
The Parsec-Scale Jets of the TeV Blazars H1426+428, 1ES 1959+650, and PKS 2155-304: 2001-2004
Piner, B.G. et al., ApJ 678 p64-77 (2008) [LINK]
-
The Hard Synchrotron X--ray Spectrum of the TeV BL Lac 1ES 1426+428
Wolter, A. et al., 386 p302-+ (2008) [LINK]
-
Mrk 421, Mrk 501, and 1ES 1426+428 at 100 GeV with the CELESTE Cherenkov telescope
Smith, D.A. et al., A&A 459 p453-464 (2006) [LINK]
-
Constraining the Emission Properties of TeV Blazar H1426+428 by the Synchrotron Self-Compton Model
Kato, T. et al., ApJ 638 p653-658 (2006) [LINK]
-
New VLBA Observations Of The Parsec-Scale Structures Of The TeV Blazars 1ES 1426+428, 1ES 1959+650, And PKS 2155-304
Piner, B.G. et al., 38 p356-+ (2006) [LINK]
-
VHE Observations of H1426+428 using TACTIC imaging telescope:2004
Thoudam, S. and et al., 4 p363-+ (2005) [LINK]
-
Simultaneous Constraints on the Spectrum of the Extragalactic Background Light and the Intrinsic TeV Spectra
of Markarian 421, Markarian 501, and H1426+428
Dwek, E. and Krennrich, F., ApJ 618 p657-674 (2005) [LINK]
-
Variations in the Very-High-Energy Gamma-Ray Radiation from the Blazar H 1426+428
Fidelis, V.V. et al., Astronomy Reports 49 p859-862 (2005) [LINK]
-
VHE observations of H 1426+428 using TACTIC imaging telescope 2004 observations.
Thoudam, S. et al., Bulletin of the Astronomical Society of India 33 p403-403 (2005) [LINK]
-
X-ray and TeV observations of the extreme BL Lac AGN H1426+428 during 2002
Falcone, A.D., New Astronomy Review 48 p415-417 (2004) [LINK]
-
Strong GeV emission accompanying TeV blazar H1426+428
Fan, Y.Z. et al., A&A 415 p483-486 (2004) [LINK]
-
X-Ray Spectral Variability of Extreme BL Lacertae Active Galactic Nucleus H1426+428
Falcone, A.D. et al., ApJ 601 p165-172 (2004) [LINK]
-
TeV observations of H1426+428 with HEGRA
Horns, D. et al., New Astronomy Review 48 p387-390 (2004) [LINK]
-
Intrinsic absorbers in BL Lac objects: The XMM-Newton view
Blustin, A.J. et al., A&A 417 p61-70 (2004) [LINK]
-
Observations of H1426+428 from 1999 to 2002 with the Whipple Observatory 10 m Telescope
Horan, D. and VERITAS Collaboration, 5 p2647-+ (2003) [LINK]
-
Multi-wavelength Observations of the TeV Blazars Mkn 421, 1ES1959+650, and H1426+428 with the HEGRA
Cherenkov Telescopes and the RXTE X-ray Satellite
Horns, D., 299 p13-+ (2003) [LINK]
-
Observations of H1426+428 with HEGRA. Observations in 2002 and reanalysis of 1999&2000 data
Aharonian, F. et al., A&A 403 p523-528 (2003) [LINK]
-
The SED of the TeV BLLac 1ES 1426+428 after correction for the TeV-IR absorption
Costamante, L. et al., New Astronomy Review 47 p677-680 (2003) [LINK]
-
Two new VHE BL Lac objects, 1ES 1426+428 and 1ES 1959+650, detected by the CAT Telescope
Djannati-Atai, A. and The CAT Collaboration, 290 p291-+ (2003) [LINK]
-
Detection of the BL Lacertae Object H1426+428 at TeV Gamma-Ray Energies
Horan, D. et al., ApJ 571 p753-762 (2002) [LINK]
-
Detection of the BL Lac object 1ES 1426+428 in the Very High Energy gamma-ray band by the CAT Telescope from 1998-2000
Djannati-Atai, A. et al., A&A 391 pL25-L28 (2002) [LINK]
-
The TeV Spectrum of H1426+428
Petry, D. et al., ApJ 580 p104-109 (2002) [LINK]
-
TeV gamma rays from the blazar H 1426+428 and the diffuse extragalactic background radiation
Aharonian, F. et al., A&A 384 pL23-L26 (2002) [LINK]
-
The BeppoSAX View of Extreme BL Lacs
Costamante, L. et al., p21 (2002) [LINK]
-
Extreme synchrotron BL Lac objects. Stretching the blazar sequence
Costamante, L. et al., A&A 371 p512-526 (2001) [LINK]
-
Looking for high energy peaked blazars
Costamante, L. et al., Mem. Soc. Astron. Italiana 72 p153-155 (2001) [LINK]
-
New extreme synchrotron BL Lac objects
Costamante, L. et al., X-ray Astronomy: Stellar Endpoints, AGN, and the Diffuse X-ray Background 599 p586-589 (2001) [LINK]
-
An X-Ray Absorption Feature in the BL Lacertae Object H1426+428
Sambruna, R.M. et al., ApJ 483 p774-+ (1997) [LINK]
-
The X-ray Spectrum of the BL Lacertae Object H1426+428
Sambruna, R.M. et al., 110 p323-+ (1996) [LINK]
-
Two X-ray-selected BL Lacertae objects observed with the HEAO 1 scanning modulation collimator
Remillard, R.A. et al., ApJ 345 p140-147 (1989) [LINK]
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