COMPTEL observations of PKS 0208-512 from 1991 to 1998

被引：0

作者：

Williams, OR ^{[1
]}

Bennett, K ^{[1
]}

Collmar, W ^{[1
]}

Iyudin, AF ^{[1
]}

Schönfelder, V ^{[1
]}

Steinle, H ^{[1
]}

Bloemen, H ^{[1
]}

Hermsen, W ^{[1
]}

McConnell, M ^{[1
]}

Ryan, J ^{[1
]}

Stacy, G ^{[1
]}

机构：

[1] European Space Agcy, Estec, Div Astrophys, NL-2200 AG Noordwijk, Netherlands

来源：

EXPLORING THE GAMMA-RAY UNIVERSE | 2001年 / 459卷

关键词：

blazars; gamma-rays;

D O I：

暂无

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

A systematic re-analysis of a observations with the blazar PKS 0208-512 in the COMPTEL field-of-view has been performed. Evidence for a possible spectral peak in the MeV band has been reported previously using data from two observations during May and June 1993. When excluding these observations, we clearly detect a low flux from PKS 0208-512 using the summed data from the remaining eighteen observations. It was also found that the detailed results with respect to the possible MeV peak depend on the range of measured photon scatter angles applied during the background estimation. The impact of this increase in the measurement uncertainties on the interpretation of the data are discussed.

引用

页码：357 / 360

页数：4

共 21 条

[1] DETECTION OF GAMMA-RAY EMISSION FROM THE QUASAR PKS 0208-512
BERTSCH, DL
DINGUS, BL
FICHTEL, CE
HARTMAN, RC
HUNTER, SD
KANBACH, G
KNIFFEN, DA
LIN, YC
MATTOX, JR
MAYERHASSELWANDER, HA
MICHELSON, PF
VONMONTIGNY, C
NOLAN, PL
PINKAU, K
SCHNEID, E
SREEKUMAR, P
THOMPSON, DJ
ASTROPHYSICAL JOURNAL, 1993, 405 (01) : L21 - L24
[2] First Cycle 4 multiwavelength observations of the gamma-ray quasar PKS 0208-512
Stacy, JG
Vestrand, WT
Sreekumar, P
Bonnell, J
Kubo, H
Hartman, RC
ASTRONOMY & ASTROPHYSICS SUPPLEMENT SERIES, 1996, 120 (04): : C549 - C552
[3] VLBI observations of southern EGRET identifications .1. PKS 0208-512, PKS 0521-365, and PKS 0537-441
Tingay, SJ
Edwards, PG
Costa, ME
Lovell, JEJ
MCCulloch, PM
Jauncey, DL
REynolds, JE
Tzioumis, AK
Migenes, V
Gough, R
King, EA
Jones, DL
Preston, RA
Murphy, DW
MEier, DL
vanOmmen, TD
StJohn, M
Hoard, DW
Nicolson, GD
Wan, TS
Shen, ZQ
ASTROPHYSICAL JOURNAL, 1996, 464 (01) : 170 - 176
[4] CGRO observations of the MeV-bright blazars PKS 0208-512 and GRO J0516-609
Blom, JJ
Bennett, K
Bloemen, H
Collmar, W
Diehl, R
Hermsen, W
Iyudin, AF
Lichti, GG
Morris, D
Schonfelder, V
Stacy, JG
Steinle, H
Strong, AW
Williams, OR
Winkler, C
ASTRONOMY & ASTROPHYSICS SUPPLEMENT SERIES, 1996, 120 (04): : C507 - C510
[5] Temporal and spectral study of PKS 0208-512 during the 2019-2020 flare
Khatoon, Rukaiya
Prince, Raj
Shah, Zahir
Sahayanathan, Sunder
Gogoi, Rupjyoti
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2022, 513 (01) : 611 - 623
[6] PKS-0208-512 DETECTED AT MEV ENERGIES BY COMPTEL - A NEW MEV-BLAZAR CANDIDATE
BLOM, JJ
BENNETT, K
BLOEMEN, H
COLLMAR, W
DIEHL, R
HERMSEN, W
IYUDIN, AF
SCHONFELDER, V
STACY, JG
STEINLE, H
WILLIAMS, OR
WINKLER, C
ASTRONOMY & ASTROPHYSICS, 1995, 298 (03) : L33 - L36
[7] Long-Term Monitoring of Blazar PKS 0208-512: A Change of γ-Ray Baseline Activity from EGRET to Fermi Era
Ammenadka, Krishna Mohana
Bhattacharya, Debbijoy
Bhattacharyya, Subir
Bhatt, Nilay
Stalin, Chelliah Subramonian
UNIVERSE, 2022, 8 (10)
[8] OBSERVATIONS OF CYGNUS X-1 BY COMPTEL DURING 1991
MCCONNELL, M
FORREST, D
RYAN, J
COLLMAR, W
SCHONFELDER, V
STEINLE, H
STRONG, A
VANDIJK, R
HERMSEN, W
BENNETT, K
ASTROPHYSICAL JOURNAL, 1994, 424 (02) : 933 - 939
[9] COMPTEL observations of the quasar PKS 0528+134 during the first 3.5 years of the CGRO mission
Collmar, W
Bennett, K
Bloemen, H
Blom, JJ
Hermsen, W
Lichti, GG
Pohl, M
Ryan, J
Schonfelder, V
Stacy, JG
Steinle, H
Williams, OR
ASTRONOMY & ASTROPHYSICS, 1997, 328 (01) : 33 - 42
[10] 56CO γ-rays from SN1998BU:: COMPTEL upper limits
Plüschke, S
Georgii, R
Diehl, R
Collmar, W
Lichti, GG
Schönfelder, V
Bloemen, H
Hermsen, W
Bennett, K
McConnell, M
Ryan, J
EXPLORING THE GAMMA-RAY UNIVERSE, 2001, 459 : 87 - 90

← 1 2 3 →