Hmmm,
The occultation events need to be recorded with at least a 1/10 sec
resolution...I know my Neximage will do 30 frames a second....I will try
and see if it will detect something on the order of a mag 4 star....I
know that CCD imagers will integrate to mag 13, but for occultation
timing it would have to integrate at 1/10 sec speeds....can they do
that, can the software do that? And will
software let you do image processing and record time?
Interesting issues....the IOTA scheme lets you record 30 frames a second
with a time hack on the tape or disk or whatever...a simple solution if
you are willing to buy the camera (super sensitive) and a recorder....I
just don't want to spend a $160 for a camera I might use once.
Chuck
Tandy W. Carter Jr. wrote:
> Hi Chuck,
>
> According to TheSky6 Pro, Iota Cancri is Magnitude 4.03. That is a
> pretty bright star. I remember Remi saying that electronic eyepieces
> were more for Lunar and Planetary work. Some of the planets are on the
> order of Magnitude 4.
>
> On my 8" LX-200, my ST-7XME is supposed to be able to go down to
> Magnitude 13 in 1 second and Magnitude 18 in 1 minute. That is pretty
> sensitive.
>
> I guess you can go to WWV. I think that there are programs that
> allow you to synchronize to WWV. However, the USNO is the official
> time keeper for the US. You can also get official time accurate to the
> second from your GPS. Windows XP computers automatically synchronize
> their clocks once a week as long as they are connected to the
> Internet, but can be forced to synchronize any time.
>
> Tandy W. Carter Jr.
> [log in to unmask]
> http://home.att.net/~tandy.carter/
> ----- Original Message ----- From: "Charles Broward" <[log in to unmask]>
> To: <[log in to unmask]>
> Sent: Tuesday, January 23, 2007 11:29 AM
> Subject: Re: Up-Coming Occultation
>
>
>> Hi,
>> I am not sure the electronic eyepieces are sensitive enough to see
>> Iota Cancri (or what ever it is).
>>
>> The camera mentioned in the IOTA article is very, very sensitive. I
>> know my Neximage, and the
>>
>> vidio camera eyepiece I have won't cut the mustard.
>>
>> Time, I think time has to be referenced back to something like WWV
>> or similar to permit syncing up all observations. So if that can be
>> done via computer, that would be neat.
>>
>> chuck
>>
>> Tandy W. Carter Jr. wrote:
>>> Hi Chuck,
>>>
>>> The accuracy of time/date stamp of the image is dependant on the
>>> accuracy of the computer's clock, not on the camera. So, the
>>> computer's clock has to by synchronized to a feed that gives a
>>> standardized time signal. As for active members that have cameras, I
>>> have one, I believe Howard has one, Scott has two, and I believe Bob
>>> O'Connell has Remi's old electronic eyepiece. There might be other
>>> cameras in the Club, but I'm not sure about them. The electronic
>>> eyepiece attached to either a VCR or a DVR might be a good solution.
>>> That way, you can image at 16 fps and time the occultation to 1/16
>>> second. I just double checked and the time/date stamp reported by
>>> images taken with CCDSoft are reported to 1/1000 second. So, I guess
>>> that's accurate enough to time an occultation. ;{)
>>>
>>> Tandy W. Carter Jr.
>>> [log in to unmask]
>>> http://home.att.net/~tandy.carter/
>>> ----- Original Message ----- From: "Charles Broward" <[log in to unmask]>
>>> To: <[log in to unmask]>
>>> Sent: Tuesday, January 23, 2007 10:13 AM
>>> Subject: Re: Up-Coming Occultation
>>>
>>>
>>>> Hi Tandy,
>>>> Who has the cameras, and can they be linked to record a accurate
>>>> enough time hack as well?
>>>>
>>>> Appearently, for the upcoming occultation, time should be within a
>>>> tenth of a second, recorded with the vidio.
>>>>
>>>> That is neat if the equipment is already on hand.
>>>> Chuck
>>> =
>>>
>>>
>>
>> --
>> -------------------------
>> Chuck Broward
>> WretchedSky Observatory
>> Melrose, Florida
>> 352-475-1014
>> [log in to unmask]
>> www.afn.org/~broward
>>
>> -----------------------------------------------------------------------------
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--
-------------------------
Chuck Broward
WretchedSky Observatory
Melrose, Florida
352-475-1014
[log in to unmask]
www.afn.org/~broward
-----------------------------------------------------------------------------
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