Final Report

I have succeeded in acquiring a confirmation image of the possible supernova in MCG+10-19-85. End figures for astrometry on the second night were 17s.39 and 43".6. All the usual checks have been made. The MPC shows no asteroids in the area for either night. Tom Boles


T. Boles, Coddenham, England, reports the discovery of an apparent supernova (mag. 18.5) on unfiltered CCD images taken on Feb 19.119 and 19.790 UT with a 0.35-m reflector. The new object is located at R.A. = 13h32m17s.38, Decl. = +60°23'43".4, which is approximately 8".3 east and 5".8 north of the center of MCG+10-19-85. The suspect is not present on Boles' images from 2003 May 25 and Apr 02 (limiting mag. 19.5) and it is not present on DSS II red (1997.480) or blue plates (1995.310).

The above reports resulted in SN2004Z. See IAU Circular 8290.

Once this has been completed, the waiting begins. An IAU Circular might be released, giving the object's assigned designation and confirming its type (type I or II from spectroscopic analysis) or more likely, one circular will announce its possible discovery (all supernovae are "possible" supernovae until a spectrogram provides confirmation) and a second, a few days later, will give its type and characteristics.

Even if you have done your checks well, this can be a very stressful time. You need to realize that, based on what you have reported, a large professional telescope somewhere in the world might be taken off its current program and given

Figure 12.9. Coddenham Observatory looking east - a third Paramount resides inside the dome.

the task of acquiring a spectrogram of your suspect. It has to be an instrument of at least 1m or 1.5m in diameter to collect enough light for analysis. The Keck and the Hubble Space telescopes have been used on occasions for faint and interesting suspects. One could become very unpopular very quickly by submitting erroneous suspects. Professional astronomers have to fight long and hard for valuable telescope time. It is scarce enough without it being called on recklessly. If the tests are carried out religiously, this should never happen.

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