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COROTEXLOG - CoRoT Stellar Targets for Exoplanet Detection Observation Log

HEASARC
Archive

Overview

CoRoT was a space astronomy mission devoted to the study of the variability with time of stars' brightness, with an extremely high accuracy (100 times better than from the ground), for very long durations (up to 150 days) and with a very high duty cycle (more than 90%). The mission was led by CNES in association with four French laboratories, and 7 participating countries and agencies (Austria, Belgium, Brazil, Germany, Spain, and the ESA Science Programme). The satellite is composed of a PROTEUS platform (the 3rd in the series), and a unique instrument: a stellar photometer. It was launched on December 27th, 2006 on a Soyuz Rocket, from Baikonour. The mission has lasted almost 6 years (the nominal 3 years duration and a 3 years extension) and has observed more than 160,000 stars. It suddenly stopped sending data on November 2nd, 2012.

CoRoT performed Ultra High Precision Photometry of Stars to detect and characterize the variability of their luminosity with two main objectives: (i) the variability of the object itself: oscillations, rotation, magnetic activity, etc.; (ii) variability due to external causes such as bodies in orbit around the star: planets and companion stars.

The original scientific objectives were focused on the study of stellar pulsations (asteroseismology) to probe the internal structure of stars, and the detection of small exoplanets through their transit in front of their host star, and the measurement of their sizes.

This lead to the introduction of two modes of observations, working simultaneously:

- The bright star mode dedicated to very precise seismology of a small sample (171) of bright and nearby stars (these data are presented in the file currently named "astero.dat" in the CDS version at ftp://cdsarc.u-strasbg.fr/pub/cats/B/corot/astero.dat, but which should change in the near future to "bright star.dat"): these data are not included in this HEASARC table, notice;

- The faint star mode, observing a very large number of stars at the same time, to detect transits, which are rare events, as they imply the alignment of the star, the planet and the observer (these data are presented in the file currently named "exo.dat" in the CDS version at ftp://cdsarc.u-strasbg.fr/pub/cats/B/corot/exo.dat, but which should change in the near future to "faint star.dat"): this HEASARC table is based on this sample. The large amount of data gathered in this mode mode turned out to be extremely fruitful for many topics of stellar physics.

Due to project constraints, two regions of the sky were accessible (circles of 10 degrees centered on the equator around Right Ascensions of 06h 50m and 18h 50m). They are called the CoRoT 'eyes': the first one is called the "anticenter" eye, whereas the second one is called the "center eye". Each pointing covers 1.4 x 2.8 square degrees.

The CoRoT project is still processing the data, aiming at removing instrumental artifacts and defects. Therefore the format and content of the catalog is still somewhat evolving. More details on the data can be found in the file http://idoc-corotn2-public.ias.u-psud.fr/jsp/doc/CoRoT_N2_versions_30sept2014.pdf. More details on the CoRoT N2 data may be found in the documentation file http://idoc-corotn2-public.ias.u-psud.fr/jsp/doc/DescriptionN2v1.5.pdf.

This HEASARC table contains information on stars observed by CoRoT in its exoplanet detection program. A few percent of these stars have 2 entries since they were observed in different windows (as specified by the corot_window_id parameter) in a subsequent observing run to the initial run in which they were observed. Each entry in this table corresponds to the unique specification of target and corot_window_id, each with a link to its associated N2 data products.

The original names of the parameters in this table, as given in the CoRoT mission documentation, are given in square brackets at the end of the parameter descriptions listed below.


Catalog Bibcode

<B/corot/>

Bulletin

The COROTEXLOG database table was last updated on 24 March 2016.

References

Archive of the CoRoT Data Center, Release N2-4.4 (2016-03-23)
     CoRoT team
    <CoRoT Data Center (2016)>

Provenance

This table was created by the HEASARC in May 2012 based on CDS Catalog B/corot file exo.dat. The HEASARC routinely updates this table within a couple days of updates being made to the CDS version of this catalog.

Parameters

CoRoT_File_Create_Date
The CoRoT data products generation date and time [crea_dat].

CoRoT_Lc_File
The directory structure and file name of the light curve file containing the time series data and available as a remote data product for this entry.

Pipeline_Version_Num
The version of the pipeline processing that generated the data products [pipe_ver].

N2_Version_Num
The version number of the N2 primary scientific data products [n2_ver].

CoRoT_Channel_Code
The CoRoT channel code flag, where a value of 0 means monochromatic results are presented, and of 1 means 3-channel results.

CoRoT_File_Size
The size of the associated file, in bytes.

Time
The UT date and time of the start time for the use of a given window for the target specified by the corot_id parameter [t_start_win].

End_Time
The UT date and time of the end time for the use of a given window for the target specified by the corot_id parameter [t_end_win].

CoRoT_ID
A 9-digit unique identifier for the CoRoT target [corotid].

Name
The CoRoT target designation using the 'CoRoT' prefix and the corot_id parameter value, as recommended by the CDS Dictionary of Nomenclature of Celestial Objects.

CoRoT_Run_Code
The CoRoT run code for the target and observation, coded as 'tRpnn', where t = 'L' (long), 'S' (short), or 'I' (initial), 'R' stands for run, p = 'c' (Galactic center pointing) or 'a' (anticenter pointing), and nn = the run number; for example, 'LRa01', 'SRc01', etc [run_code].

CoRoT_Halfccd_ID
The reference for the half CCD from which the product originates, where, for example, 'E1R' refers to the right ('R') CCD number 1 of the Exo-planet ('E') channel [hlfccdid].

CoRoT_Window_ID
The CoRoT target window identification. For the Exo channel, this can be from 0 to 8191 [win_id].

Target_Mag
The magnitude of the target. The HEASARC does not know for certain in which band this is measured, but it is probably the V band [magnit_v?].

RA
The Right Ascension of the target in the selected equinox. This was given in J2000 decimal degrees to a precision of 10-5 degrees in the original table.

Dec
The Declination of the target in the selected equinox. This was given in J2000 decimal degrees to a precision of 10-5 degrees in the original table.

LII
The Galactic Longitude of the target.

BII
The Galactic Latitude of the target.

Contam_Factor
The contamination factor for the target [contfact].

Exposure
The exposure time in seconds for the individual samples, either 32 or 512, indicating if the series is oversampled or not. A value of -1 indicates that during the run a change occurred in the sampling, i.e., it either shifted from 512 to 32 s or the converse) [exptime].

Bmag
The star magnitude in the B band from the EXODAT/COROTSKY database [magnit_B].

Vmag
The star magnitude in the V band from the EXODAT/COROTSKY database [magnit_V].

Rmag
The star magnitude in the R band from the EXODAT/COROTSKY database [magnit_R].

Imag
The star magnitude in the I band from the EXODAT/COROTSKY database [magnit_I].

Color_Temperature
The color temperature of the star from the EXODAT/COROTSKY database [coltemp].

Lc_Mean
The light curve mean, in electrons per second [lc_mean].

Lc_RMS
The light curve RMS, in electrons per second [lc_rms]

Number_Hot_Pixels
The number of hot pixels detected in the template [nbhotpix].

Blue_Lc_Mean
The mean of the light curve in the blue channel, in electrons per second [lc_mean_b].

Green_Lc_Mean
The mean of the light curve in the green channel, in electrons per second [lc_mean_g].

Red_Lc_Mean
The mean of the light curve in the red channel, in electrons per second [lc_mean_r].

White_Lc_Mean
The mean of the light curve in integrated white light in units of electrons s-1.

Blue_Lc_RMS
The RMS of the light curve in the blue channel, in electrons per second [lc_rms_b].

Green_Lc_RMS
The RMS of the light curve in the green channel, in electrons per second [lc_rms_g].

Red_Lc_RMS
The RMS of the light curve in the red channel, in electrons per second [lc_rms_r].

White_Lc_RMS
The RMS of the light curve in integrated white light, in electrons per second.

Spect_Type
The spectral type of the star from the EXODAT/COROTSKY database, where if no spectral type is available, 'K5III' is used [spectype].

CoRoT_Windescript_File
The directory structure and file name of the associated WINDESCRIPTOR file which describes the characteristics and history of the observation. This is available as a remote data product for this entry.

Class
The HEASARC Browse object classification, based on the value of the spect_type parameter.


Contact Person

Questions regarding the COROTEXLOG database table can be addressed to the HEASARC User Hotline.

Page Author: Browse Software Development Team
Last Modified: 28-Mar-2016