2015ApJ...799....7A

Query : 2015ApJ...799....7A

2015ApJ...799....7A - Astrophys. J., 799, 7 (2015/January-3)

VERITAS observations of the BL Lac object PG 1553+113.

ALIU E., ARCHER A., AUNE T., BARNACKA A., BEHERA B., BEILICKE M., BENBOW W., BERGER K., BIRD R., BUCKLEY J.H., BUGAEV V., BYRUM K., CARDENZANA J.V., CERRUTI M., CHEN X., CIUPIK L., CONNOLLY M.P., CUI W., DICKINSON H.J., DUMM J., EISCH J.D., ERRANDO M., FALCONE A., FEDERICI S., FENG Q., FINLEY J.P., FORTIN P., FORTSON L., FURNISS A., GALANTE N., GILLANDERS G.H., GRIFFIN S., GRIFFITHS S.T., GRUBE J., GYUK G., HAKANSSON N., HANNA D., HOLDER J., HUGHES G., HUMENSKY T.B., JOHNSON C.A., KAARET P., KAR P., KERTZMAN M., KHASSEN Y., KIEDA D., KRAWCZYNSKI H., KRENNRICH F., KUMAR S., LANG M.J., MADHAVAN A., McARTHUR S., McCANN A., MEAGHER K., MILLIS J., MORIARTY P., NIETO D., O'FAOLAIN DE BHROITHE A., ONG R.A., ORR M., OTTE A.N., PARK N., PERKINS J.S., POHL M., POPKOW A., PROKOPH H., PUESCHEL E., QUINN J., RAGAN K., RAJOTTE J., REYES L.C., REYNOLDS P.T., RICHARDS G.T., ROACHE E., SEMBROSKI G.H., SHAHINYAN K., STASZAK D., TELEZHINSKY I., TUCCI J.V., TYLER J., VARLOTTA A., VASSILIEV V.V., WAKELY S.P., WEINSTEIN A., WELSING R., WILHELM A., WILLIAMS D.A. and ZITZER B.

Abstract (from CDS):

We present results from VERITAS observations of the BL Lac object PG 1553+113 spanning the years 2010, 2011, and 2012. The time-averaged spectrum, measured between 160 and 560 GeV, is well described by a power law with a spectral index of 4.33±0.09. The time-averaged integral flux above 200 GeV measured for this period was (1.69±0.06)x10–11 photons/cm2/s, corresponding to 6.9% of the Crab Nebula flux. We also present the combined γ-ray spectrum from the Fermi Large Area Telescope and VERITAS covering an energy range from 100 MeV to 560 GeV. The data are well fit by a power law with an exponential cutoff at 101.9±3.2 GeV. The origin of the cutoff could be intrinsic to PG 1553+113 or be due to the γ-ray opacity of our universe through pair production off the extragalactic background light (EBL). Given lower limits to the redshift of z > 0.395 based on optical/UV observations of PG 1553+113, the cutoff would be dominated by EBL absorption. Conversely, the small statistical uncertainties of the VERITAS energy spectrum have allowed us to provide a robust upper limit on the redshift of PG 1553+113 of z ≤ 0.62. A strongly elevated mean flux of (2.50±0.14)x10–11 photons/cm2/s (10.3% of the Crab Nebula flux) was observed during 2012, with the daily flux reaching as high as (4.44 ± 0.71) x 10–11 photons/cm2/s (18.3% of the Crab Nebula flux) on MJD 56048. The light curve measured during the 2012 observing season is marginally inconsistent with a steady flux, giving a χ2 probability for a steady flux of 0.03%.

Abstract Copyright: ∼

Journal keyword(s): BL Lacertae objects: general

Simbad objects: 1

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Number of rows : 1
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 PG 1553+113 BLL 15 55 43.0440048528 +11 11 24.365649948 14.91 14.72 14.57 13.99   ~ 672 1

Query : 2015ApJ...799....7A

Basic data :
PG 1553+113 -- BL Lac
Other object types: otypes_help 		Rad (2020A&A,BWE,...), BLL (2010ApJ,[VV2000b],...), gam (0FGL,1FGL,...), X (2009A&A,2E,...), Bla (2017A&A,[DGT2001],...), Bz? (2019A&A,3HSP,...), QSO (2016A&A,QSO,...), AGN (2011ApJ,CGRaBS), MIR (WISEA,WISE), BL? (2021MNRAS), * (Gaia), UV (PG), NIR (2MASS), Opt (SDSS)
ICRS coord. (ep=J2000) : 		15 55 43.0440048528 +11 11 24.365649948 (Optical) [ 0.0157 0.0157 90 ] A 2020yCat.1350....0G
FK4 coord. (ep=B1950 eq=1950) : 		15 53 20.6289795641 +11 20 06.003107632 [ 0.0157 0.0157 90 ]
Gal coord. (ep=J2000) : 		021.9089234076081 +43.9641596943183 [ 0.0157 0.0157 90 ]
Proper motions mas/yr : 		0.023 0.018 [0.017 0.016 90] A 2020yCat.1350....0G
Radial velocity / Redshift / cz : 		V(km/s) 89382 [~] / z(emission) 0.360 [~] / cz 107925 [~]
   (Opt) D 2016ApJ...818..113N
Parallaxes (mas): 		0.0111 [0.0244] A 2018yCat.1345....0G
Fluxes (13) :
U (AB) 14.91 [0.03] D 2007ApJS..173..471M
B (AB) 14.72 [0.02] D 2007ApJS..173..471M
V (AB) 14.57 [0.02] D 2007ApJS..173..471M
R 13.99 [~] D 2008ApJS..175...97H
G 14.070070 [0.018639] C 2020yCat.1350....0G
J 12.541 [0.030] C 2003yCat.2246....0C
H 11.897 [0.033] C 2003yCat.2246....0C
K 11.182 [0.019] C 2003yCat.2246....0C
u (AB) 15.056 [0.004] C 2009ApJS..182..543A
g (AB) 14.732 [0.004] C 2009ApJS..182..543A
r (AB) 15.389 [0.012] C 2009ApJS..182..543A
i (AB) 14.118 [0.004] C 2009ApJS..182..543A
z (AB) 13.925 [0.005] C 2009ApJS..182..543A
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Identifiers (71) :
An access of full data is available using the icon Vizier near the identifier of the catalogue

QSO B1553+113 1FLE J1559+1149 RBS 1538 XMMSL1 J155542.9+111126
BWE 1553+1120 GB6 B1553+1120 RGB J1555+111 9Y-MST J1555+1111
CGRaBS J1555+1111 87GB 155321.5+112002 RGB J1555.7+1111 [DGT2001] B1553+113
CLASS J155543.0435+111124.376 GLEAM J155542+111118 RX J1555.7+1111 [HB93] 1553+113
CRATES J155543+111127 3HSP J155543.0+111124 1RXS J155543.2+111114 [IN88] 1553+113
2E 3529 ICRF J155543.0+111124 SDSS J155543.03+111124.3 [MGL2009] BZB J1555+1111
2E 1553.3+1120 IERS B1553+113 SRGA J155543.6+111125 [MML2015] 5BZB J1555+1111
EF B1553+1119 INTREF 662 TeV J1555+111 [SRM2005] J155543.04+111124.3
1ES 1553+11.3 IVS B1553+113 TGSSADR J155543.1+111120 [VV2000b] J155543.1+111124
0FGL J1555.8+1110 JVAS J1555+1111 TIC 264583798 [VV2003b] J155543.1+111124
1FGL J1555.7+1111 JVAS B1553+113 TXS 1553+113 [VV2006b] J155543.1+111124
2FGL J1555.7+1111 2MASS J15554305+1111243 VCS1 J1555+1111 [VV2010b] J155543.1+111124
3FGL J1555.7+1111 MITG J155545+1110 VER J1555+111 [VV98b] J155543.1+111124
4FGL J1555.7+1111 NVSS J155543+111124 WB 1553+1120 [ZEH2003] RX J1555.7+1111 5
1FHL J1555.7+1111 PBC J1555.5+1109 2WHSP J155543.0+111123 Gaia DR3 4456196249421914624
2FHL J1555.7+1111 PG 1553+11 WISEA J155543.04+111124.4 Gaia DR1 4456196245123765504
3FHL J1555.7+1111 PG 1553+113 WISE J155543.05+111124.4 Gaia DR2 4456196249421914624
FL8Y J1555.7+1111 QSO J1555+1111 2XMM J155542.9+111124

References (672 between 1850 and 2026) (Total 672)
Simbad bibliographic survey began in 1850 for stars (at least bright stars) and in 1983 for all other objects (outside the solar system).
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Collections of Measurements Description of Measurements

Velocities : 5    Plx : 1    PM : 2   

   

Observing logs
IUE : 2    XMM : 1   

   

External archives :

Archive data at HEASARC - High-Energy Astrophysics Science Archive Research Center

Data at NED - NASA/IPAC Extragalactic Database : PG 1553+113

Link by name to the catalogue in VizieR :

BWE 1553+1120 2E 3529 IERS B1553+113 2MASS J15554305+1111243 MITG J155545+1110
NVSS J155543+111124 PG 1553+11 PG 1553+113 1RXS J155543.2+111114 SDSS J155543.03+111124.3
WISEA J155543.04+111124.4 WISE J155543.05+111124.4 Gaia DR3 4456196249421914624 Gaia DR1 4456196245123765504 Gaia DR2 4456196249421914624

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