2024ApJ...974...50C

Query : 2024ApJ...974...50C

2024ApJ...974...50C - Astrophys. J., 974, 50 (2024/October-2)

X-Ray and Multiwavelength Polarization of Mrk 501 from 2022 to 2023.

CHEN C.-T.J., LIODAKIS I., MIDDEI R., KIM D.E., DI GESU L., DI MARCO A., EHLERT S.R., ERRANDO M., NEGRO M., JORSTAD S.G., MARSCHER A.P., WU K., AGUDO I., POUTANEN J., MIZUNO T., KOUCH P.M., LINDFORS E., BORMAN G.A., GRISHINA T.S., KOPATSKAYA E.N., LARIONOVA E.G., MOROZOVA D.A., SAVCHENKO S.S., TROITSKY I.S., TROITSKAYA Y.V., VASILYEV A.A., ZHOVTAN A.V., ACEITUNO F.J., BONNOLI G., CASANOVA V., ESCUDERO J., AGIS-GONZALEZ B., HUSILLOS C., OTERO SANTOS J., SOTA A., PIIROLA V., MYSERLIS I., ANGELAKIS E., KRAUS A., GURWELL M., KEATING G., RAO R., KANG S., LEE S.-S., KIM S.-H., CHEONG W.Y., JEONG H.-W., SONG C., BERDYUGIN A.V., KAGITANI M., KRAVTSOV V., NITINDALA A.P., SAKANOI T., IMAZAWA R., SASADA M., FUKAZAWA Y., KAWABATA K.S., UEMURA M., NAKAOKA T., AKITAYA H., CASADIO C., SIEVERS A., ANTONELLI L.A., BACHETTI M., BALDINI L., BAUMGARTNER W.H., BELLAZZINI R., BIANCHI S., BONGIORNO S.D., BONINO R., BREZ A., BUCCIANTINI N., CAPITANIO F., CASTELLANO S., CAVAZZUTI E., CIPRINI S., COSTA E., DE ROSA A., DEL MONTE E., DI LALLA N., DONNARUMMA I., DOROSHENKO V., DOVCIAK M., ENOTO T., EVANGELISTA Y., FABIANI S., FERRAZZOLI R., GARCIA J.A., GUNJI S., HAYASHIDA K., HEYL J., IWAKIRI W., KAARET P., KARAS V., KISLAT F., KITAGUCHI T., KOLODZIEJCZAK J.J., KRAWCZYNSKI H., LA MONACA F., LATRONICO L., MALDERA S., MANFREDA A., MARIN F., MARINUCCI A., MARSHALL H.L., MASSARO F., MATT G., MITSUISHI I., MULERI F., NG C.-Y., O'DELL S.L., OMODEI N., OPPEDISANO C., PAPITTO A., PAVLOV G.G., PEIRSON A.L., PERRI M., PESCE-ROLLINS M., PETRUCCI P.-O., PILIA M., POSSENTI A., PUCCETTI S., RAMSEY B.D., RANKIN J., RATHEESH A., ROBERTS O.J., ROMANI R.W., SGRO C., SLANE P., SOFFITTA P., SPANDRE G., SWARTZ D.A., TAMAGAWA T., TAVECCHIO F., TAVERNA R., TAWARA Y., TENNANT A.F., THOMAS N.E., TOMBESI F., TROIS A., TSYGANKOV S.S., TUROLLA R., VINK J., WEISSKOPF M.C., XIE F. and ZANE S.

Abstract (from CDS):

We present multiwavelength polarization measurements of the luminous blazar Mrk 501 over a 14 month period. The 2-8 keV X-ray polarization was measured with the Imaging X-ray Polarimetry Explorer (IXPE) with six 100 ks observations spanning from 2022 March to 2023 April. Each IXPE observation was accompanied by simultaneous X-ray data from NuSTAR, Swift/XRT, and/or XMM-Newton. Complementary optical-infrared polarization measurements were also available in the B, V, R, I, and J bands, as were radio polarization measurements from 4.85 GHz to 225.5 GHz. Among the first five IXPE observations, we did not find significant variability in the X-ray polarization degree and angle with IXPE. However, the most recent sixth observation found an elevated polarization degree at >3σ above the average of the other five observations. The optical and radio measurements show no apparent correlations with the X-ray polarization properties. Throughout the six IXPE observations, the X-ray polarization degree remained higher than, or similar to, the R-band optical polarization degree, which remained higher than the radio value. This is consistent with the energy-stratified shock scenario proposed to explain the first two IXPE observations, in which the polarized X-ray, optical, and radio emission arises from different regions.

Abstract Copyright: © 2024. The Author(s). Published by the American Astronomical Society.

Journal keyword(s): Blazars - Active galaxies - Black holes - Relativistic jets - Spectropolarimetry - Polarimetry - X-ray active galactic nuclei

Simbad objects: 6

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Number of rows : 6
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 RX J0232.8+2017 BLL 02 32 48.6148874688 +20 17 17.486717388     18.00 13.96   ~ 387 1
2 Z 184-50 BLL 11 04 27.3140835504 +38 12 31.798495872   13.50 12.90 8.31   ~ 2841 1
3 PG 1553+113 BLL 15 55 43.0440048528 +11 11 24.365649948 14.91 14.72 14.57 13.99   ~ 672 1
4 Z 225-7 BLL 16 53 52.21668403 +39 45 36.6088754 14.09 14.15 13.29 8.26   ~ 2304 2
5 QSO B1959+650 BLL 19 59 59.8520303688 +65 08 54.652536492     12.8 11.21   ~ 699 2
6 PKS J2158-3013 BLL 21 58 52.0652249880 -30 13 32.118447792   13.36 13.09 12.62   ~ 1829 1

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