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Дата изменения: Thu Jun 4 12:16:43 2009
Дата индексирования: Tue Aug 18 10:41:20 2009
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Поисковые слова: hst
FORS1: Sky Flats and Rotator Effect
 [ ESO ]

FORS1: Sky Flats and Rotator Effect


Median Twilight Image

(all frames normalized by their median before averaging and corrected for 4-port structure)

Median of Normalized Twilight Images at Rotator Angle 0 Median of Normalized Twilight Images at Random Rotator Angle Time Frame and Rotator Angle Distribution

B_UT2_2CCD: 134 frames

April - September 2007

(distribution of rotator angles)

U_UT2_2CCD: 106 frames

April - September 2007

(distribution of rotator angles)

       

(uncorrected median twilight image)

B_UT2: 298 frames

September 2004 - December 2005

(distribution of rotator angles)

(uncorrected median twilight image)

U_UT2: 246 frames

September 2004 - December 2005

(distribution of rotator angles)

       

(uncorrected median twilight image)

B_UT1_C: 234 frames

December 2002 - March 2004

(distribution of rotator angles)

(uncorrected median twilight image)

U_UT1_C: 214 frames

December 2002 - March 2004

(distribution of rotator angles)

       

(uncorrected median twilight image)

B_UT3: 266 frames

September 2001 - September 2002

(distribution of rotator angles)

(uncorrected median twilight image)

U_UT3: 243 frames

September 2001 - September 2002

(distribution of rotator angles)

       

(uncorrected median twilight image)

B_UT1_B: 137 frames

August 2000 - February 2001

(distribution of rotator angles)

(uncorrected median twilight image)

U_UT1_B: 175 frames

August 2000 - February 2001

(distribution of rotator angles)

       

(uncorrected median twilight image)

B_UT1_A: 142 frames

April 1999 - September 1999

(distribution of rotator angles)

(uncorrected median twilight image)

U_UT1_A: 77 frames

April 1999 - September 1999

(distribution of rotator angles)