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AAVSO prosi o monitoring wizualny i CCD regionu Trapezu w Mgławicy M42.

Dr Matthewa Templetona bada zmienność jasnych gwiazd Trapezu za pomocą satelity MOST. Najchętniej widziane są pomiary pomiary CCD z precyzją lepszą niż 1 mmag (co jest dosyć poważnym wymaganiem). Obserwacje planowane są na okres grudzień 2010 - styczeń 2011 Wsparcie amatorów monitorujących młode gwiazdy Trapezu z różnych długości geograficznych będą ważnym elementem planowanego projektu.

Udostępniony jest manual przybliżający metody i procedury pomiarów:

http://www.aavso.org/ccd-observing-manual  
http://www.aavso.org/sites/default/files/Transforms-Sarty.pdf  

Poniżej bezpośredni opis celów kampanii:

1) High-precision, photometric observations of the bright eclipsing binary star BM Ori (V ~ 6.5; RA: 05 35 16.15 , Dec: -05 23 06.5). We request filtered observations of this star to better understand the nature of the eclipsing object. Two to three cycles of BVRI measurements per night are encouraged, in order to provide good coverage of the 6.5-day variation. Given the brightness of the object we strongly encourage high-S/N observations, but please be careful not to saturate.

2) Time-series observations of fainter sources in the field. There are a number of fainter sources in and around the Trapezium region, many of which are not well characterized. Your observations may be very useful in improving our understand of these objects. As with BM Ori, 2-3 cycles of BVRI per night would be most useful. In order to reach fainter magnitudes, it would be necessary to saturate on BM Ori, or else take multiple exposures and co-add. Observers should use the "126" comparison star as the reference for fainter objects.

3) Observations of targets of interest outside the Trapezium. There are a number of targets in and around Orion but outside the Trapezium region that are of astrophysical interest, and any and all young stellar objects in Orion, Taurus, and Auriga are welcome. For both visual and CCD observers, there are a number of rapid and irregular variables whose light curves are deserving of long-term monitoring and have been a part of the AAVSO program for many decades. These include: T Ori, UX Ori, FU Ori, T Tau, RR Tau, RY Tau, and RW Aur. All of these sources have had excellent visual coverage which should continue for the indefinite future. Calibrated BVRI observations of these targets would also be valuable, and again should concentrate on photometric precision rather than rapid cadence.

Wyniki obserwacji w odpowiednich formatach winny być przesyłane na poniższy adres:

http://www.aavso.org/observing/submit/