VI/117 Observation Log from ASCA (PLAIN Center, 2001)
Observation Log from ASCA
ADC_Keywords: Observatory log ; X-ray sources
Mission_Name: ASCA
Description:
ASCA (Advanced Satellite for Cosmology and Astrophysics) is the fourth
Japanese X-ray astronomy satellite launched on February 20, 1993 (see
Tanaka et al., 1994PASJ...46L..37T 1994PASJ...46L..37T) The collaboration between Japanese
and US scientists has been carried out in the developments of the
X-ray telescopes, the X-ray CCD cameras, and software.
ASCA observed more than 3000 targets before stopping scientific
observations as a consequence of a huge solar flare occured in mid
July, 2000. ISAS continued monitoring operation until the ASCA
reentered the atmosphere on March 2, 2001.
Scientific instrumentation of ASCA consists of four X-ray telescopes
and corresponding focal plane detectors. Focal plane detectors are two
X-ray CCD cameras (SIS: Solid-state Imaging Spectrometers) and two Gas
Imaging Spectrometers (GIS). With these detectors, ASCA covers the
energy range of 0.5-10 keV.
This catalogue is a copy of the ASCA Observation log from the Data
ARchive and Transmission System (DARTS), provided by the PLAIN center
at ISAS/JAXA, Japan.
All the ASCA data have been public. The data is archived in a
target-oriented (strictly speaking, observation-oriented) structure,
i.e., all the data produced from an observation is put into a
directory --- although some exceptions exist for observations in very
early epoch.
Each dataset includes telemetry data, data products (event files,
images, energy spectra, light curves, etc.), and calibration data.
ISAS provides the telemetry and calibration data, and ASCA data
processing center in ADF (Astrophysics Data Facility) at NASA/GSFC
reproduces the data products.
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
asca.dat 112 3079 The ASCA Log
--------------------------------------------------------------------------------
See also:
http://www.astro.isas.jaxa.jp/asca/ : the ASCA Home page
http://www.darts.isas.jaxa.jp/astro/asca/ : the ASCA archive home page
Byte-by-byte Description of file: asca.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
4- 11 I8 --- SeqNum Sequence Number (SEQ_NO)
13- 37 A25 --- Target Target Name as specified in proposal
(TARGET_NAME)
39- 46 F8.4 deg RAdeg *RA in J2000 decimal degrees (FOV_RA)
47- 54 F8.4 deg DEdeg *Dec in J2000 decimal degrees (FOV_DEC)
56- 66 A11 "date" ObsDate Observation date (STARTTIME)
70- 75 F6.1 ks GISexp ? Exposure time of GIS instrument (EXPT_GIS)
79- 84 F6.1 ks SISexp ? Exposure time of SIS instrument (EXPT_SIS)
86-112 A27 --- PIname Name of Principal Investigator (PI_NAME)
--------------------------------------------------------------------------------
Note on RAdeg, DEdeg: the accuracy on the position is about 10arcsec
--------------------------------------------------------------------------------
(End) Takayuki TAMURA [PLAIN] 26-Aug-2005