The pulsed light curves of Her X–1 as observed by BeppoSAX

نویسندگان

  • D. Dal Fiume
  • M. Orlandini
  • G. Cusumano
  • S. Del Sordo
  • M. Feroci
  • F. Frontera
  • T. Oosterbroek
  • E. Palazzi
  • A. N. Parmar
  • A. Santangelo
  • A. Segreto
چکیده

We report on the timing analysis of the observation of the X–ray binary pulsar Her X–1 performed during the BeppoSAX Science Verification Phase. The observation covered more that two full orbital cycles near the maximum of the main–on in the 35 day cycle of Her X–1. We present the pulse profiles from 0.1 to 100 keV. Major changes are present below 1 keV, where the appearance of a broad peak is interpreted as re-processing from the inner part of the accretion disk, and above 10 keV, where the pulse profile is less structured and the main peak is appreciably harder. The hardness ratios show complex changes with pulse phase at different energies.

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

The complete catalogue of GRBs observed by the Wide Field Cameras on board BeppoSAX

Context. We present the complete on-line catalogue of gamma-ray bursts observed by the two Wide Field Cameras on board BeppoSAX in the period 1996–2002. Aims. Our aim is to provide the community with the largest published data set of GRB’s prompt emission X-ray light curves and other useful data. Methods. This catalogue (BS-GRBWFCcat) contains data on 77 bursts and a collection of the X-ray lig...

متن کامل

Angioma serpiginosum successfully treated by a single session of intense pulsed light therapy

Angioma serpiginosum (AS) is a nevoid capillary malformation developed congenitally or thereafter. The AS stops growing after puberty and may remain persistent throughout life. The pulsed dye laser (PDL) and KTP are used to treat the AS usually after several sessions. We treated a patient with AS with only one session of intense pulsed light (IPL) therapy. A 40-year-old lady with Fitzpatrick sk...

متن کامل

X-ray Afterglow Light Curves : toward Standard Candle ?

We investigate the clustering of afterglow light curves observed at X-ray and optical wavelengths. We have constructed a sample of 61 bursts with known distance and X-ray afterglow. This sample includes bursts observed by BeppoSAX, XMM-Newton, Chandra, and SWIFT. We correct the light curves for cosmological effects and compare the observed X-ray fluxes one day after the burst. We check for corr...

متن کامل

Investigation of Microstructure weld zone of Hastelloy X Pulsed Nd-YAG laser welds

In the present study, the microstructure of welded zone of Hastelloy X sheets with thickness of 1 mm via pulsed Nd-YAG laser welding were studied. This welding process was done by autogenus and conductive method. Microstructure were observed by metallurgical OM and SEM. Results shown Solidification of the weld metal is dendritic. The dendrites in the central zone of the welding are fine and equ...

متن کامل

Spectral and timing properties of the X - ray emission from the millisecond pulsar PSR B 1821 − 24

We report results on the timing and spectral analysis of observations of the millisecond pulsar PSR B1821−24 with RXTE, BeppoSAX and Chandra. The X-ray light curve is characterized by two narrow peaks at a phase distance of 0.452 ± 0.002. The average pulsed emission, over the range 1.6–20 keV, is well represented by a single power law with a photon index α = 1.30 −0.02 +0.05 and unabsorbed (2–1...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

عنوان ژورنال:

دوره   شماره 

صفحات  -

تاریخ انتشار 1997