10 m spectral observations of SN1987A: the first year
نویسندگان
چکیده
منابع مشابه
Imaging observations of SN1987A at gammaray energies
The Caltech imaging q-ray telescope was launched by balloon from Alice Springs, NT, Australia for observations of SN1987A during the period 18.80-18.87 November 1987 UT. The preliminary results presented here are derived from 8200 seconds of instrument livetime on the supernova and 2500 seconds on the Crab Nebula and pulsar at a float altitude of 37 kin. We have obtained the first images of the...
متن کاملOSSE OBSERVATIONS OF 57Co IN SN1987A
The Oriented Scintillation Spectrometer Experiment (OSSE) on the COMPTON Gamma Ray Observatory has observed SN1987A for two 2-week periods during the first nine months of the mission. Evidence for gamma-ray line and continuum emission from 57Co is observed with an intensity of about 10-4 gamma-cm-2-s-1. This photon flux between 50 and 136 keV is demonstrated by Monte Carlo calculations to be in...
متن کاملObservations on teaching first-year physics
Highly successful students, as measured by grades and by scores on the Force Concept Inventory, still struggle with fundamental concepts in mathematics and physics. These difficulties, which turn physics into parrot learning and include confusing velocity and acceleration or being unable to reason with graphs, are revealed by problems requiring estimation and conceptual reasoning. I discuss the...
متن کاملThe Study of the First Complete Denture Use Age During a 10 Year Period in Iran : A Cross-sectional Study
Introduction Becoming completely edentulous is a major concern of dentists and other health care providers. It mostly targets aged population and has numerous comorbidities. An old-fashion but currently used treatment plan for edentulism is complete denture. We aimed to investigate the time when our elderlies are in need of complete dentures and what are the reasons of tooth loss in our count...
متن کاملCT-guided stereotaxy: first 10-year experience.
The authors present an overview on CT-guided stereotaxy performed in the last 10 years in the University Hospital Olomouc. During this period a total of 811 stereotactic brain operations were performed. Of these, 710 were done in the field of afunctional and 101 in the field of functional stereotaxy. The majority of procedures were biopsies of intracranial lesions (n = 464), evacuations of intr...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Monthly Notices of the Royal Astronomical Society
سال: 1988
ISSN: 0035-8711,1365-2966
DOI: 10.1093/mnras/235.1.19p