2023ApJ...946L..21N

Query : 2023ApJ...946L..21N

2023ApJ...946L..21N - Astrophys. J., 946, L21 (2023/March-3)

The IXPE View of GRB 221009A.

NEGRO M., DI LALLA N., OMODEI N., VERES P., SILVESTRI S., MANFREDA A., BURNS E., BALDINI L., COSTA E., EHLERT S.R., KENNEA J.A., LIODAKIS I., MARSHALL H.L., MEREGHETTI S., MIDDEI R., MULERI F., O'DELL S.L., ROBERTS O.J., ROMANI R.W., SGRO C., TERASHIMA M., TIENGO A., VISCOLO D., DI MARCO A., LA MONACA F., LATRONICO L., MATT G., PERRI M., PUCCETTI S., POUTANEN J., RATHEESH A., ROGANTINI D., SLANE P., SOFFITTA P., LINDFORS E., NILSSON K., KASIKOV A., MARSCHER A.P., TAVECCHIO F., CIBRARIO N., GUNJI S., MALACARIA C., PAGGI A., YANG Y.-J., ZANE S., WEISSKOPF M.C., AGUDO I., ANTONELLI L.A., BACHETTI M., BAUMGARTNER W.H., BELLAZZINI R., BIANCHI S., BONGIORNO S.D., BONINO R., BREZ A., BUCCIANTINI N., CAPITANIO F., CASTELLANO S., CAVAZZUTI E., CHEN C.-T., CIPRINI S., DE ROSA A., DEL MONTE E., DI GESU L., DONNARUMMA I., DOROSHENKO V., DOVCIAK M., ENOTO T., EVANGELISTA Y., FABIANI S., FERRAZZOLI R., GARCIA J.A., HAYASHIDA K., HEYL J., IWAKIRI W., JORSTAD S.G., KAARET P., KARAS V., KISLAT F., KITAGUCHI T., KOLODZIEJCZAK J.J., KRAWCZYNSKI H., MALDERA S., MARIN F., MARINUCCI A., MITSUISHI I., MIZUNO T., NG C.-Y., OPPEDISANO C., PAPITTO A., PAVLOV G.G., PEIRSON A.L., PESCE-ROLLINS M., PETRUCCI P.-O., PILIA M., POSSENTI A., RAMSEY B.D., RANKIN J., SPANDRE G., SWARTZ D.A., TAMAGAWA T., TAVERNA R., TAWARA Y., TENNANT A.F., THOMAS N.E., TOMBESI F., TROIS A., TSYGANKOV S.S., TUROLLA R., VINK J., WU K. and XIE F.

Abstract (from CDS):

We present the IXPE observation of GRB 221009A, which includes upper limits on the linear polarization degree of both prompt and afterglow emission in the soft X-ray energy band. GRB 221009A is an exceptionally bright gamma-ray burst (GRB) that reached Earth on 2022 October 9 after traveling through the dust of the Milky Way. The Imaging X-ray Polarimetry Explorer (IXPE) pointed at GRB 221009A on October 11 to observe, for the first time, the 2-8 keV X-ray polarization of a GRB afterglow. We set an upper limit to the polarization degree of the afterglow emission of 13.8% at a 99% confidence level. This result provides constraints on the jet opening angle and the viewing angle of the GRB, or alternatively, other properties of the emission region. Additionally, IXPE captured halo-rings of dust-scattered photons that are echoes of the GRB prompt emission. The 99% confidence level upper limit to the prompt polarization degree depends on the background model assumption, and it ranges between ∼55% and ∼82%. This single IXPE pointing provides both the first assessment of X-ray polarization of a GRB afterglow and the first GRB study with polarization observations of both the prompt and afterglow phases.

Abstract Copyright: © 2023. The Author(s). Published by the American Astronomical Society.

Journal keyword(s): Gamma-ray bursts - Polarimetry - X-ray astronomy

Simbad objects: 5

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Number of rows : 5
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 3C 279 Bla 12 56 11.16657958 -05 47 21.5251510   18.01 17.75 15.87   ~ 3205 2
2 GrW 170817 GWE 13 09 48.0850 -23 22 53.343           ~ 2683 0
3 GRB 221009A gB 19 13 03.85 +19 46 22.7           ~ 433 0
4 QSO B1959+650 BLL 19 59 59.8520303688 +65 08 54.652536492     12.8 11.21   ~ 699 2
5 NAME BL Lac BLL 22 02 43.2913536816 +42 16 39.979416792   15.66 14.72     ~ 2397 1

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