B/subaru Log of Subaru Prime Focus Camera Exposures (ADAC NAOJ, 2007) ================================================================================ Log of Subaru Prime Focus Camera (Suprime-Cam) Exposures ================================================================================ ADC_Keywords: Observatory log ; Description: This database contains a log of the Subaru Prime Focus Camera (Suprime-Cam) exposures since April 2001. The data are regularly updated, and the last date of the log is written in "File Summary". Note that from this version of Nov. 2005, the data number is largely increased because those data with worse position determination (up to 30 arcsec error) are included. Suprime-Cam is an 80-mega pixels (10240 x 8192) mosaic CCD camera, for the wide-field prime focus of the 8.2m Subaru telescope. Suprime-Cam covers a field of view 34'x27', a unique facility among the 8-10m class telescopes, with a resolution of 0".202 per pixel. The focal plane consists of ten high- resistivity 2kx2k CCDs developed by MIT Lincoln Laboratory, which are cooled by a large Stirling-cycle cooler. The CCD readout electronics was designed to be scalable, which allows the multiple read-out of tens of CCDs. It takes 50 seconds to readout entire arrays. A filter-exchange mechanism of the jukebox type is designed that can hold up to ten large filters (205x170x15mm^3^). The wide-field corrector is basically a three-lens Wynne- type, but has a new type of atmospheric dispersion corrector. The corrector provides a flat focal plane and an un-vignetted field of view of 30' in diameter. The achieved co-planarity of the focal array mosaic is smaller than 30um peak-to-peak, which realizes mostly the seeing limited image over the entire field. The median seeing in the I_c-band, measured over one year and a half, is 0".61. The PSF anisotropy in Suprime-Cam images, estimated by stellar ellipticities, is about 2% under this median seeing condition. At the time of commissioning, Suprime-Cam had the largest survey speed, which is defined as the field of view multiplied by the primary mirror area of the telescope, among those cameras built for sub-arcsecond imaging. For details, see: Miyazaki et al., Publ. Astron. Soc. Japan 54, 833-853, 2002 (2002PASJ...54..833M) File Summary: -------------------------------------------------------------------------------- FileName Lrecl Records Explanations -------------------------------------------------------------------------------- ReadMe 80 . This file suprimc.dat 133 282397 The Suprime-Cam Observation Log (2005-11-02) -------------------------------------------------------------------------------- See also: http://subarutelescope.org/Observing/Instruments/SCam/ : Sprime-Cam home page http://smoka.nao.ac.jp/ : Subaru data archives, home page Byte-by-byte Description of file: suprimc.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 1- 12 A12 --- FrameID ! Frame ID (1) 14- 21 F8.4 deg RAdeg Right Ascension (J2000) of the CCD chip center 23- 30 F8.4 deg DEdeg Declination (J2000) of the CCD chip center 32- 35 I4 yr ObsStart.Y Observation start date (year, UT) 36 A1 --- --- [-] 37- 38 I2 "month" ObsStart.M Observation start date (month, UT) 39 A1 --- --- [-] 40- 41 I2 d ObsStart.D Observation start date (day, UT) 43- 44 I2 h ObsStart.h Exposure start time (hour, UT) 45 A1 --- --- [:] 46- 47 I2 min ObsStart.m Exposure start time (minute, UT) 48 A1 --- --- [:] 49- 50 I2 s ObsStart.s Exposure start time (second, UT) 52- 57 F6.1 s ExpTime Exposure time 59- 64 A6 --- ObsType Observation type (BIAS, FLAT, OBJECT, etc.) * those data other than OBJECT are omitted. 66- 95 A30 --- Object Object name 97-104 A8 --- Filter Filter combination (2) 106-110 F5.3 --- AirMass Value of the airmass at the beginning of the exposure 112-115 I4 pix NAXIS1 Dimension of the image (X-axis) 117-120 I4 pix NAXIS2 Dimension of the image (Y-axis) 122 A1 --- FF [01] Flat-fielding processing flag (3) 124-127 F4.2 arcsec Seeing Seeing size 129-133 F5.3 --- Ellip The PSF anisotropy estimated by stellar ellipticities -------------------------------------------------------------------------------- Note (1): Unique identifier for an observational data. The last digit denotes CCD chip number. For CCD chip number, see: http://subarutelescope.org/Observing/Instruments/SCam/ccd.html Note (2): Filter names written on FITS headers. For a detailed description see: http://smoka.nao.ac.jp/filter.jsp Note (3): '1'= flat-field processed data are provided in SMOKA, '0'= they are not provided. -------------------------------------------------------------------------------- ================================================================================ (End) Fumiaki Nakata, Koichi Nakajima [ADAC, NAOJ] 25-Aug-2007