1ES 1011+496

BL Lacertae object in the constellation Ursa Major 1ES 1011+496 J2000.0 Ursa Major 10 15 04.140 +49 26 00.70 0.212000 63,556 km/s 2.727 Gly 16.15 16.56 BL LAC 78.54 kpc ly -2 off(diameter; 2MASS K-band total isophote) High frequency peaked BL Lac object 2MASS J10150414+49226008, RBS 0841, LEDA 2342845, NVSS J101504+492601, 7C 1011+4941, VIPS 0312, RX J1015.0+4926, 51P 104 File:1ES 1011+496 SDSS.png BL Lac object 1ES 1011+496 seen by SDSS. 1ES 1011+496 is a relatively distant BL Lacertae object (BL Lac) located 2.7 billion light-years away in the constellation of Ursa Major.Results for 1ES 1011+496 https://ned.ipac.caltech.edu/byname?objname=1ES+1011+496&hconst=67.8&omegam=0.308&omegav=0.692&wmap=4&corr_z=1 2025-07-19 NASA/IPAC Extragalactic Database This object has a redshift of 0.212 based on its absorption line spectrumAlbert J. Aliu E. Anderhub H. Antoranz P. Armada A. Baixeras C. Barrio J. A. Bartko H. Bastieri D. Becker J. K. Bednarek W. Berger K. Bigongiari C. Biland A. Bock R. K. September 2007 Discovery of Very High Energy γ-Rays from 1ES 1011+496 at z = 0.212 https://ui.adsabs.harvard.edu/abs/2007ApJ...667L..21A/abstract The Astrophysical Journal en 667 1 L21–L24 10.1086/521982 0706.4435 2007ApJ...667L..21A 0004-637X and was first discovered as an extragalactic radio source by astronomers in March 1986.Wisniewski W. Z. Sitko M. L. Sitko A. K. March 1986 1011+496 and 1217+348 : two new candidate BL Lacertae objects. https://articles.adsabs.harvard.edu/pdf/1986MNRAS.219..299W Monthly Notices of the Royal Astronomical Society en 219 2 299–304 10.1093/mnras/219.2.299 free 0035-8711 Description 1ES 1011+496 is described as a high frequency peaked BL Lac object or an HBL for short.1110.6341 astro-ph.HE S. Rügamer E. Angelakis MAGIC and Multi-Wavelength Observations of three HBLs in 2008 2011-10-28 Bastieri D. Dorner D. Kovalev Y. Y. Lähteenmäki A. Lindfors E. Pittori C. Reinthal R. When observed in 2007 by MAGIC Telescope, the object was found to emit very high energy gamma-rays. The findings by MAGIC, found its integrated flux was shown increasing above 200 GeV level of around 1.58 ± 0.32 × 10−11 photons cm−2 s−1. The source of 1ES 1011+496 was extremely variable in X-rays with its flux estimated to be measured between 2 and 10 KeV with one small X-ray flare detected. It is also varying in optical brightness levels when detected by Tuorla Blazar Monitoring Program.Reinthal Riho Rügamer Stefan Lindfors Elina J Mazin Daniel Stamerra Antonio Longo Francesco Lucarelli Fabrizio Pittori Carlotta Lähteenmäki Anne 2012-03-26 Multi-wavelength Observations of the HBL 1ES 1011+496 in Spring 2008 https://doi.org/10.1088/1742-6596/355/1/012017 Journal of Physics: Conference Series 355 1 012017 10.1088/1742-6596/355/1/012017 1109.6504 2012JPhCS.355a2017R 1742-6596 In March 2023, the source was shown having a large variability upon being monitored by Neil Gehrels Swift Observatory.Kapanadze Bidzina Kharadze E. March 2023 The Lowest Historical 0.3-10 keV State of the TeV-Detected Blazar 1ES 1011+496 https://ui.adsabs.harvard.edu/abs/2023ATel15936....1K/abstract The Astronomer's Telegram en 15936 1 2023ATel15936....1K A strong powerful flare was detected from 1ES 1011+496 in February 2014.Sahu Sarira León Alberto Rosales de Miranda Luis Salvador 2017-11-01 Photohadronic scenario in interpreting the February–March 2014 flare of 1ES 1011+496 https://epjc.epj.org/articles/epjc/abs/2017/11/10052_2017_Article_5335/10052_2017_Article_5335.html The European Physical Journal C en 77 11 741 10.1140/epjc/s10052-017-5335-2 free 2017EPJC...77..741S 1434-6044 1610.01709 Ahnen M. L. Ansoldi S. Antonelli L. A. Antoranz P. Babic A. Banerjee B. Bangale P. Almeida U. Barres de Barrio J. A. González J. Becerra Bednarek W. Bernardini E. Biasuzzi B. Biland A. Blanch O. 2016-06-01 MAGIC observations of the February 2014 flare of 1ES 1011+496 and ensuing constraint of the EBL density https://www.aanda.org/articles/aa/abs/2016/06/aa27256-15/aa27256-15.html Astronomy & Astrophysics en 590 A24 10.1051/0004-6361/201527256 1602.05239 2016A&A...590A..24A 0004-6361Mirzoyan Razmik February 2014 Exceptionally high >100 GeV flux state of 1ES 1011+496 https://ui.adsabs.harvard.edu/abs/2014ATel.5887....1M/abstract The Astronomer's Telegram en 5887 1 2014ATel.5887....1M Observations by MAGIC, noted the object underwent an active phrase with its flux recorded as increasing by 14 times compared to the previous flare recorded in 2007. During the observation period, the spectrum 1ES 1011+496 showed a small curvature over 1 magnitude in energy with no signs of major changes to its spectral shape. A further analysis of the object's spectral energy distribution would show the trend of the synchrotron peak shifting towards higher energies as the flux increases. This is found similar to "bluer when brighter" trend and was mainly due to particle spectrum changes.Sinha Atreyee Sahayanathan S. Acharya B. S. Anupama G. C. Chitnis V. R. Singh B. B. 2017-02-09 On the Spectral Curvature of VHE Blazar 1ES 1011+496: Effect of Spatial Particle Diffusion The Astrophysical Journal 836 1 83 10.3847/1538-4357/836/1/83 1612.00231 2017ApJ...836...83S free 0004-637X The object displays a core-jet morphology. Prior observations made in 1986 upon its discovery, showed its morphology is compact and mainly made up of a compact radio core and some extended radio emission surrounding it in a form of a halo. A more recent observation made in 2016 based on a 15 GHz radio map, found the core is optically thick with a radio jet present.Aleksić J. Ansoldi S. Antonelli L. A. Antoranz P. Arcaro C. Babic A. Bangale P. Almeida U. Barres de Barrio J. A. González J. Becerra Bednarek W. Bernardini E. Biasuzzi B. Biland A. Blanch O. 2016-07-01 Insights into the emission of the blazar 1ES 1011+496 through unprecedented broadband observations during 2011 and 2012 https://www.aanda.org/articles/aa/pdf/2016/07/aa27176-15.pdf Astronomy & Astrophysics en 591 A10 10.1051/0004-6361/201527176 1603.06776 2016A&A...591A..10A 0004-6361 Imaging by Very Large Array, MERLIN and Very Long Baseline Array has specifically shown the jet is extending by few hundred milliarcseconds from the core in nearly same direction.Wu Zhongzu Jiang D. R. Gu Minfeng Liu Yi 2007-04-01 VLBI observations of seven BL Lacertae objects from RGB sample https://www.aanda.org/articles/aa/pdf/2007/16/aa6754-06.pdf Astronomy & Astrophysics en 466 1 63–73 10.1051/0004-6361:20066754 0706.0191 2007A&A...466...63W 0004-6361 When probed deeper, its angle is shown as stable and orientating at a negative degree between -100° and -80°. In addition, the jet is also found polarized with its bright features mainly appearing at different times and positions. The host galaxy of 1ES 1011+496 is described as a relatively normal elliptical galaxy based on Hubble Space Telescope imaging and optical imaging.Urry C. Megan Scarpa Riccardo O'Dowd Matthew Falomo Renato Pesce Joseph E. Treves Aldo April 2000 The Hubble Space Telescope Survey of BL Lacertae Objects. II. Host Galaxies The Astrophysical Journal en 532 2 816–829 10.1086/308616 astro-ph/9911109 2000ApJ...532..816U 0004-637XScarpa Riccardo Urry C. Megan Falomo Renato Pesce Joseph E. Treves Aldo April 2000 The Hubble Space Telescope Survey of BL Lacertae Objects. I. Surface Brightness Profiles, Magnitudes, and Radii of Host Galaxies The Astrophysical Journal en 532 2 740–815 10.1086/308618 astro-ph/9911147 2000ApJ...532..740S 0004-637XFalomo Renato Kotilainen Jari K. December 1999 Optical imaging of the host galaxies of X-ray selected BL Lacertae objects Astronomy and Astrophysics en 352 85–102 astro-ph/9910106 1999A&A...352...85F 0004-6361 The magnitude of the host is estimated to be 17.30 based on observations and it has a supermassive black hole mass of 8.32 M☉.Finke J. D. Shields J. C. Böttcher M. Basu S. 2008-01-01 Redshift limits of BL Lacertae objects from optical spectroscopy https://www.aanda.org/articles/aa/pdf/2008/02/aa8492-07.pdf Astronomy & Astrophysics en 477 2 513–516 10.1051/0004-6361:20078492 0711.2089 2008A&A...477..513F 0004-6361Wu Xue-Bing Liu F. K. Zhang T. Z. 2002-07-01 Supermassive black hole masses of AGNs with elliptical hosts https://www.aanda.org/articles/aa/pdf/2002/27/aa2337.pdf Astronomy & Astrophysics en 389 3 742–751 10.1051/0004-6361:20020577 astro-ph/0203158 2002A&A...389..742W 0004-6361 References External links 1ES 1011+496 on SIMBAD Category:BL Lacertae objects Category:Ursa Major Category:Blazars 2342845 Category:ROSAT objects Category:Active galaxies Category:Galaxies discovered in 1986