XMMT2FLARE - 2XMM Flares Detected from Tycho-2 Stars
A survey of stellar X-ray flares from the XMM-Newton serendipitous source catalogue: Hipparcos-Tycho cool stars. Pye J.P., Rosen S., Fyfe D., Schroeder A.C. <Astron. Astrophys. 581, A28 (2015)> =2015A&A...581A..28P (SIMBAD/NED BibCode)
A consecutive number which identifies each entry (detection) in the 2XMM catalog.
A common designation for the star, taken from the CDS SIMBAD database and other sources.
An alternative designation for the star, taken from the CDS SIMBAD database and other sources.
The stellar identifier taken from the Tycho-2 Catalog.
The Right Ascension of the star in the selected equinox, taken (by the HEASARC) from the Tycho-2 Catalog. This should be regarded as merely indicative since stellar proper motion has not been taken into account.
The Declination of the star in the selected equinox, taken (by the HEASARC) from the Tycho-2 Catalog. This should be regarded as merely indicative since stellar proper motion has not been taken into account
The Galactic Longitude of the star (derived from the Tycho-2 position).
The Galactic Latitude of the star (derived from the Tycho-2 position).
The stellar V-band apparent magnitude, taken from the Tycho-2 Catalog.
The stellar B-V color, uncorrected for reddening, taken from the Tycho-2 Catalog.
The stellar spectral type, taken from the CDS SIMBAD database and other sources.
The stellar type, category, or other characteristics, taken from the CDS SIMBAD database, e.g., Algol, BY Dra, del Sct (delta Scuti variable), double star system, EB (eclipsing binary), FK Com, flare star, Orion-type variable, PMS (pre-main-sequence star), RS CVn-type, SB (spectroscopic binary), SB1 (single-lined SB), or W UMa.
The distance of the star from the earth, in parsecs.
A code for the reference source for the cited distance value, as follows:
HIP = Hipparcos (van Leeuwen 2007, CDS Cat. I/311) TYC = Tycho (2000,CDS Cat. I/259) (ph. par. from V) N2K = Ammons et al. (2006, ApJ, 638, 1004, CDS Cat. V/136) GCT = van Altena et al. (1995, CDS Cat. I/238) B04 = Budding et al. (2004, CDS Cat. J/A+A/417/263) F03 = Favata et al. (2003, A&A, 403, 187) F07 = Franciosini et al. (2007, A&A, 468, 485) F95 = Favata et al. (1995, A&A, 298, 482) G07 = Guedel et al. (2007, CDS Cat. J/A+A/468/353) M09 = Morales et al. (2009, CDS Cat. J/ApJ/707/671) M81 = Marraco et al. (1981, AJ, 86, 62) R95 = Reid et al. (1995, AJ, 110, 1838, CDS Cat. III/198) R99 = Robichon et al. (1999, CDS Cat. J/A+A/345/471) S04 = Stelzer et al. (2004, CDS Cat. J/A+A/423/1029) T02 = Tsujimoto et al. (2002, CDS Cat. J/ApJ/566/974) Z04 = Zuckerman et al. (2004, CDS Cat. J/other/ARA+A/42.685)
This flag parameter indicates whether ('Y') or not ('N') the star was the target of the XMM-Newton observation (taken from the 2XMM Catalog).
This flag parameter is set to 'Y' if the star was in the authors' Cool, Variable Sample (CVS) or to 'N' if it is in their Cool, Low-Variable Sample (CLVS). See Section 3 of the reference paper for more details on these two samples.
The 2XMM source identifier. This is a unique number assigned to a group of 2XMM catalogue entries (DETIDs) which are assumed to be the same source.
An additional 2XMM source identifier. This indicates if a 2XMM source identifier should be matched to another one, and relates to high-proper-motion stars.
The IAU-style 2XMM source designation assigned to the specified 2XMM source identifier.
The logarithm of the ratio of the total-band [0.2-12 keV] 2XMM X-ray flux to the visual-band Tycho-2 flux for the star.
The logarithm of the total-band [0.2-12 keV] X-ray luminosity of the star, in erg s-1, derived from the 2XMM X-ray flux and the assumed distance.
The XMM-Newton observation identifier (ObsID), taken from 2XMM.
The date and time of the start of the specified observation taken from 2XMM.
The date and time of the end of the specified observation taken from 2XMM.
The "ontime" for the MOS1 camera M1_ONTIME, for the specified observation, if available, else the "ontime" for the MOS2 camera (M2_ONTIME), else the "ontime" for the PN camera (PN_ONTIME), in seconds. Here **_ONTIME is the total good exposure time (after GTI filtering) for the detection in the corresponding camera. These values are taken from 2XMM.
The PN filter used for the specified observation, taken from 2XMM.
The MOS1 filter used for the specified observation, taken from 2XMM.
The MOS2 filter used for the specified observation, taken from 2XMM.
The minimum of the off-axis angle of the source from the nominal pointing direction for the 3 XMM-Newton cameras, i.e, min[PN_OFFAX, M1_OFFAX, M2_OFFAX], in arcminutes, taken from 2XMM.
The instrument (PN, M1, M2) corresponding to the exposure with the lowest variability chi-squared probability, taken from 2XMM.
The summary "quality" flag for the detection, based on the 2XMM SUM_FLAG parameter, but re-evaluated for present work, as follows:
0 = good (2XMM SUM_FLAG) 1 = source parameters may be affected (2XMM SUM_FLAG) 3 = located in a area where spurious detection may occur (2XMM SUM_FLAG) 5 = optical loading 6 = counting-mode exposure problems -3 = flag12=T
The number of flares or other "events" identified in the X-ray light-curve for the specified observation, as derived by the present authors.
Notes on the properties of the star, etc., made by the present authors.
Selected reference(s) for the specified star, written in a concise form, e.g, 'Koen+ 2002'. The full references corresponding to these short-forms are available at http://cdsarc.cds.unistra.fr/ftp/cats/J_A+A/581/A28/refs.dat.
Reference(s) to the XMM-Newton results on the specified star, written in a concise form, e.g, 'Koen+ 2002'. The full references corresponding to these short-forms are available at http://cdsarc.cds.unistra.fr/ftp/cats/J_A+A/581/A28/refs.dat.
The URL link to the 2XMM summary-results web page at LEDAS for the specified observation.
The event identifier: this is a consecutive number which identifies each event in a specific light-curve. For 80 ObsIDs there is only a single event in an observation, while there are 11 ObsIDs with 2 events, 8 ObsIDs with 3 events, 4 ObsIDS with 4 events, 2 ObsIDS with 5 events and 3 ObsIDs with 6 events.
This flag parameter has the following possible values:
Y: TRUE, if event time profile is considered to be fully observed; N: FALSE, if it is not considered to be fully observed.
This flag parameter is set to 'Y' if the observed event is considered to be a flare, else is set to 'N'.
The authors' estimate of the event type: flare, trend, gradual, indeterminate, or periodic. See Section 3.1 of the reference paper for a discussion of this characterization.
The signal-to-noise ratio of the event over the time span given by the event duration parameter.
The source's quiescent level fq, i.e., the mean X-ray flux (presumably excluding the interval in which this event or other events occurred) in the total band, 0.2-12 keV, in erg cm-2 s-1, as estimated by the authors.
The peak X-ray flux fp of the event, over and above the source's quiescent level, in the total band, 0.2-12 keV, in erg cm-2 s-1, as estimated by the authors. Thus, the total X-ray flux of the event is fq + fp.
The ratio R of the event's peak-to-quiescent X-ray fluxes, f_p/fq. Thus if R = 0.30, the total peak flux was 30% more than (1.30 times) the quiescent level.
The time of the peak of the event. This was calculated by the HEASARC based on the start time of the observation and the time relative to the start of the observation when the peak occurred, both of which parameters were given in the original table.
The time of the peak of the event relative to the start time of the observation, in seconds.
The event rise time, defined as the time interval over which the count rate increased from Cmax / e to Cmax, where Cmax is is the count rate above the quiescent level at the peak, in seconds.
The event decay time, defined as the time interval over which the count rate decreased from Cmax to Cmax / e, where Cmax is is the count rate above the quiescent level at the peak, in seconds.
The event duration, defined as the time interval between the times in the rise and decay phases when the count rate was C_max/e, in seconds.
The luminosity corresponding to the quiescent level flux of the source during the observation, in the total band (0.2-12 keV), in erg s-1.
The luminosity corresponding to the peak flux of the source during the specified event, in the total band (0.2-12 keV), in erg s-1.
The total-band emitted energy of the event over the time interval specified by the event duration, in erg.
The HEASARC Browse object classification, based on the value of the spect_type parameter.