Reanalysis of Voyager ultraviolet spectrometer limits to the extreme-ultraviolet and far-ultraviolet diffuse astronomical flux

被引:25
作者
Edelstein, J [1 ]
Bowyer, S [1 ]
Lampton, M [1 ]
机构
[1] Univ Calif Berkeley, Space Sci Lab, Berkeley, CA 94720 USA
关键词
diffuse radiation; methods : data analysis; ultraviolet : general;
D O I
10.1086/309192
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
We reexamine Voyager Ultraviolet Spectrometer (UVS) data used to establish upper limits to the 500-900 Angstrom and 900-1100 Angstrom cosmic diffuse background. The measurement of diffuse hull with the Voyager UVS data requires complex corrections for noise sources which are far larger than the astronomical signal. In the analyses carried out to date, the upper limits obtained on the diffuse background show statistical anomalies which indicate that substantial systematic errors are present. We detail these anomalies and identify specific problems with the analyses. We derive statistically robust 2 a upper limits for continuum flux of 570 photons s(-1) cm(-2) sr(-1) Angstrom(-1) and for the 1000 Angstrom diffuse line flux of 11,790 photons s(-1) cm(-2) sr(-1) The true limits may be substantially higher because of unknown systematic uncertainties. The new statistical limits alone are insufficient to support previous conclusions based on the Voyager data, including work on the character of interstellar dust and estimates of the diffuse extragalactic far-UV background as absorbed by intergalactic dust.
引用
收藏
页码:187 / 190
页数:4
相关论文
共 11 条
[1]  
BOWYER S, 1991, ANNU REV ASTRON ASTR, V29, P59
[2]  
BOWYER S, 1996, IAU S, V152, P611
[3]  
BROADFOOT AL, 1977, SPACE SCI REV, V21, P183, DOI 10.1007/BF00200850
[4]  
EDELSTEIN J, 2000, IN PRESS AP SS
[5]   FAR-ULTRAVIOLET BACKGROUND OBSERVATIONS AT HIGH GALACTIC LATITUDE .1. THE COMA CLUSTER [J].
HOLBERG, JB ;
BARBER, HB .
ASTROPHYSICAL JOURNAL, 1985, 292 (01) :16-21
[7]   2-SAMPLE DISCRIMINATION OF POISSON MEANS [J].
LAMPTON, M .
ASTROPHYSICAL JOURNAL, 1994, 436 (02) :784-786
[8]   CONSTRAINTS ON THE OPTICAL-PROPERTIES OF INTERSTELLAR DUST IN THE FAR-ULTRAVIOLET - VOYAGER OBSERVATIONS OF THE DIFFUSE SKY BACKGROUND [J].
MURTHY, J ;
HENRY, RC ;
HOLBERG, JB .
ASTROPHYSICAL JOURNAL, 1991, 383 (01) :198-204
[9]   An analysis of 17 years of Voyager observations of the diffuse far-ultraviolet radiation field [J].
Murthy, J ;
Hall, D ;
Earl, M ;
Henry, RC ;
Holberg, JB .
ASTROPHYSICAL JOURNAL, 1999, 522 (02) :904-914
[10]   Decaying neutrinos and the extragalactic background light [J].
Overduin, JM ;
Wesson, PS .
ASTROPHYSICAL JOURNAL, 1997, 483 (01) :77-86