TVZHR profile for the 1991 Perseid shower |
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| Authors: | R. L. Hawkes D. E. B. Fleming |
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| Affiliation: | (1) Physics, Engineering and Geology Department, Mount Allison University, EOA 3C0 Sackville, NB, Canada;(2) Present address: Dept. of Physics and Astronomy, McMaster University, Hamilton, Ontario, Canada |
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| Abstract: | Image intensified video detection systems were used to observe the 1991 Perseid meteor shower from two locations in eastern Canada. In 29.6 hours of total observing time a total of 668 meteors were detected, of which 403 were Perseids. We derived a profile of TVZHR (television zenithal hourly rate) values for the 1991 Perseid shower over the solar longitude (epoch 2000) interval 138°51 to 141°01. The apparent limiting stellar magnitudes of the observing systems were +9.4 and +8.8 (corresponding to limiting meteor magnitudes for our geometry ranging from +8.7 to +7.0). Within the observing period, the maximum TVZHR rate was approximately 1600, and occurred at solar longitude 139.9°. This is in good agreement with the second peak observed by visual observers. The data suggest that TVZHR values should be divided by a factor of approximately 5 to compare TVZHR and ZHR values. |
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