c2009u5_20100311

C/2009 U5 (Grauer)

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C/2009 U5 (Grauer) � by Bernhard Haeusler, Germany

� 2010-03-11 by Bernhard Haeusler, Maidbronn, Germany frozen on comet, asteroids and stars

220 min. exposure, 2010-03-11 UT 22:27, 12" SCT f-5.65 + CCD ST10XME
18.95 mag, coma: 6", tail: 15" in PA254

MPC observation: computed with Astrometrica

COD B82
OBS Bernhard Haeusler
TEL 0.30-m Schmidt-Cassegrain + CCD

NET CMC-14

K02RD8V C2010 03 11.97448 08 48 36.23 +25 07 29.9 19.8 R B82
K02RD8V C2010 03 11.98861 08 48 35.93 +25 07 32.5 19.6 R B82
K02RD8V C2010 03 12.01684 08 48 35.34 +25 07 36.2 19.4 R B82

CK09U050 C2010 03 11.95333 08 48 36.39 +25 04 04.1 18.8 N B82
CK09U050 C2010 03 11.96743 08 48 36.31 +25 04 05.5 18.7 N B82
CK09U050 C2010 03 11.99566 08 48 35.97 +25 04 10.0 18.9 N B82
CK09U050 C2010 03 12.02389 08 48 35.70 +25 04 13.4 18.7 N B82

07505 C2010 03 11.93922 08 49 09.18 +25 14 08.4 17.1 R B82
07505 C2010 03 11.95333 08 49 08.81 +25 14 08.5 16.9 R B82
07505 C2010 03 12.01684 08 49 07.18 +25 14 09.5 17.0 R B82
07505 C2010 03 12.02389 08 49 06.99 +25 14 09.6 17.0 R B82

31445 C2010 03 11.93922 08 49 13.92 +25 10 32.9 17.6 R B82
31445 C2010 03 11.96038 08 49 13.47 +25 10 33.4 17.4 R B82
31445 C2010 03 11.96743 08 49 13.32 +25 10 33.7 17.3 R B82
31445 C2010 03 11.97448 08 49 13.17 +25 10 33.7 17.4 R B82
31445 C2010 03 11.98155 08 49 13.00 +25 10 34.0 17.2 R B82

Gauss curve produced by Astrometrica. The total PSF is using the aperture circle of 3 x 3 pixel around the brightest pixel.
You see the Gauss curve right as the computed ideal line and the real pixels contributed around the ideal line.
The Fit RMS is the deviation from the ideal line (inlay under the Gauss curve).

Photometry computed with FOCAS II, using the Multibox method:

COD B82
OBS Bernhard Haeusler
CATALOG: USNO A2.0 / CMC-14 - BAND: R

                                                       10x10 20x20 30x30 40x40 50x50 60x60   SNR   SB COD
OBJECT        DATE          TIME          +/-      +/-     +/-     +/-      +/-     +/-  N FWHM CAT
------------ ----------      --------    ----- ----- ----- ----- ----- ----- ---- ---- ---

C/2009 U5 11/03/2010 23:38:31 18.95 18.68 18.59 18.44 18.21 5.2 18.9 B82
C/2009 U5 11/03/2010 23:38:31* 0.22 0.34 0.42 0.95 2.67 14 4.4 CMC

FoCAs II - 07/01/2009-b

FOCAS II is a tool for photometry on the base of data coming from Astrometrica. Focas is basically using the .LOG file of Astrometrica.

Explanation of the FOCAS II table headings:

Object, date and time are self-explaining.
10x10, 20x20 ... 60x60 are the measured magnitudes according to the aperture sizes of photometry in arc sec (rectancle).
SNR is the Signal-to-noise ratio for aperture photometry (calculator).
SB is the magnitude of the faintest star on the image matching with the used star catalogue. This is not the faintest star of the image!
COD is the MPC Code of the observatory.

second line:
+/- are the precisions of the measurements.
N is the number of the used images for the measurements.
FWHM is the Full-Width Half-Maximum of the total PSF: Measure of the seeing.
CAT is the used star catalog in Astrometrica.

Focas II is using the .log file of Astrometrica and is computing the photometry under different apertures (10x10 ... 60x60).
The graphs are showing the astrometric precision of the images.

links:

http://astrosurf.com/cometas-obs/index_i.htm Visual and CCD Observations and images from the "Cometas Obs" mailing list, using the Focas II format

es.groups.yahoo.com/group/Cometas_Obs The Spanish comet observation group in Yahoo

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