D... sorry.. I continue
if you have suggestions comments on the web pages , feel free to send them .
Cheers
yannick
>
> Dear Jean-Charles
>
> As it is written in the email, the gain in accuracy is a factor
> of two between 2MASS and USNO. I will send this email tomorrow, but
> I thin all is ready. If you ha&
>> Hi Yannick,
>>
>> I checked a couple of typos, and added a bit of formating which
>> I would include as is on the CFHTLS news section. Yannick, how
>> about giving an estimation of gain in accuracy for the new
>> astrometry using 2MASS? I understand it varies from field to
>> field but on average I remember you gave some figures at the UM.
>>
>> JJ, is it all fine as is? If so, I then suggest Yannick sends
>> it this time to the "cfhtls" alias. I guess you could attach
>> a small 1024x768 "screensaver" size chunck of one of the amazing
>> JPEG from the Deep 85% as a visual addition? Here, I cropped one
>> for you, attached to this email, it is only 1% of one Deep field,
>> wao... truly amazing!
>>
>> Jean-Charles.
>>
>> ------------------------------------------------------------------------------
>> Dear CFHTLS registered users
>>
>> The Synoptic T0004 Table is now completed and opened to the public
>> without restriction. This table provides useful information about the
>> release and all quality assessment meta-data built during the production
>> of the release.
>>
>> The T0004 release has important new features as compared to T0003:
>>
>> - 2 sets of Deep data :
>> o 25% best seeing images stack (D25: ugriz with seeing down to 0.60"
>> for
>> some fields with exp. time up to 15hrs)
>> o 85% best seeing images stack : the deepest wide field ever produced
>> with a 4-meter telescope (D85: up to 50 hrs in some fields)
>>
>> - New Wide field: addition of the W4 wide field with 11 deg2 complete
>> in ugriz.
>>
>> - New astrometry: done with 2MASS instead of USNO. It provides more
>> accurate and more stable astrometric calibration than T0003 for ALL
>> fields (a gain in rms internal and external error position by a
>> factor
>> of 2). It also provides a more stable an accurate field-to-field
>> photometric calibration.
>>
>> - Number of stacks:
>> o Deep: 40 [20 D25 (4*ugriz) + 20 D85 (4*ugriz)]
>> o Wide: 524 (35 u + 133 g + 173 r + 137 i + 46 z)
>>
>> More information is available through the T0004 summary
>>
>> http://terapix.iap.fr/rubrique.php?id_rubrique=241
>>
>> as well as the Synoptic T0004 Table entry page
>>
>> http://terapix.iap.fr/article.php?id_article=724
>>
>> CFHT/CADC/Terapix
>>
>> ps: attached is a 1% section of one of the Deep85 field gri color image.
>>
>
>
>
Received on Fri Jul 13 2007 - 11:09:33 HST