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J/A+A/614/A125     Stellar content of the XMM-Newton slew survey (Freund+, 2018)

The stellar content of the XMM-Newton slew survey. Freund S., Robrade J., Schneider P.C., Schmitt J.H.M.M. <Astron. Astrophys. 614, A125 (2018)> =2018A&A...614A.125F (SIMBAD/NED BibCode)
ADC_Keywords: X-ray sources ; Populations, stellar ; Cross identifications Keywords: stars: activity - X-ray: stars - methods: miscellaneous Abstract: We present a detailed analysis of the stellar content of the current version of the XMM-Newton slew survey (XMMSL2). Since stars emit only a small fraction of their total luminosity in the X-ray band, the stellar XMMSL2 sources ought to have relatively bright optical counterparts. Therefore the stellar identifications were obtained by an automatic crossmatch of the XMMSL2 catalog with the first Gaia data release (Gaia DR1), 2MASS, and Tycho2 catalogs. The reliability of this procedure was verified by a comparison with the individually classified Einstein Observatory medium sensitivity survey X-ray sources and by a crossmatch with the Chandra Source Catalog. We identify 6815 of the 23252 unique XMMSL2 sources to be stellar sources, while 893 sources are flagged as unreliable. For every counterpart a matching probability is estimated based upon the distance between the XMMSL2 source and the counterpart. Given this matching probability the sample is expected to be reliable to 96.7% and complete to 96.3%. The sample contains stars of all spectral types and luminosity classes, and late-type dwarfs have the largest share. For many stellar sources the fractional contribution of the X-ray band to the total energy output is found above the saturation limit of previous studies (LX/Lbol=10-3), because the XMMSL2 sources are more affected by flares owing to their short exposure times of typically 6s. A comparison with the second ROSAT all-sky survey (2RXS) source catalog shows that about 25% of the stellar XMMSL2 sources are previously unknown X-ray sources. The results of our identification procedure can be accessed via VizieR. Description: The stellar content of the current release of the XMM-Newton slew survey (XMMSL2) is presented, which was obtained by an automatic crossmatch with the Gaia DR1, 2MASS, and Tycho2 catalogs. Further informations about the sources were adopted from the BrightStar catalog and the catalog by Lepine & Gaidos (2011, Cat. J/AJ/142/138) of bright M dwarfs. The first 98 columns of the presented catalog were adopted from the XMMSL2 catalog (see IX/53 for details). The catalog contains a matching probability for all stellar associations. Additionally basic properties of the stellar sources (e.g. position, proper motion, parallax, photometry in multiple bands) were adopted from the optical and IR catalogs and additional properties (e.g. effective temperature, bolometric flux and luminosity) were derived. The catalog contains all stellar counterparts with a matching probability higher than 66%, unreliable counterparts due to their properties are flagged. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file catalog.dat 1679 8418 Stellar sources of the XMMSL2
See also: I/259 : The Tycho2 Catalog (Hog+ 2000) I/337 : Gaia DR1 (Gaia Collaboration, 2016) II/246 : 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003) V/50 : Bright Star Catalogue, 5th Revised Ed. (Hoffleit+, 1991) IX/53 : XMMSL2 catalog (XMM-SSC, 2017) J/AJ/142/138 : All-sky catalog of bright M dwarfs (Lepine+, 2011) J/A+A/588/A103 : Second ROSAT all-sky survey (2RXS) source catalog (Boller+, 2016) Byte-by-byte Description of file: catalog.dat
Bytes Format Units Label Explanations
1- 23 A23 --- XMMSL2 Official name for sources detected in the XMM-Newton slew survey (UNIQUE_SRCNAME) (1) 25- 34 A10 --- ObsId Observation number (OBSID) (1) 36- 38 I3 --- SNum Number which uniquely identifies each detection in an observation (SOURCENUM) (1) 40- 48 F9.5 deg RAdeg Right ascension (J2000) (RA) (1) 50- 58 F9.5 deg DEdeg Declination (J2000) (DEC) (1) 60- 65 F6.2 arcsec ePos Statistical error on the source position (RADEC_ERR) (1) 67- 75 F9.5 deg GLON Galactic longitude (LII) (1) 77- 85 F9.5 deg GLAT Galactic latitude (BII) (1) 87- 95 F9.6 --- HR1 ? Hardness ratio (HR1) (1) 97-104 F8.6 --- e_HR1 ? rms uncertainty on HR1 (HR1_ERR) (1) 106-124 A19 --- DateS Start time of the slew containing this source (DATE_OBS) (1) 126-144 A19 --- DateE End time of the slew containing this source (DATE_END) (1) 146-157 E12.6 ct SctsB8 ? Number of background subtracted counts, in the total energy band (0.2-12keV) (SCTS_B8) (1) 159-166 F8.5 ct e_SctsB8 ? Statistical 1 sigma error on SctsB8 (SCTSB8ERR) (1) 168-179 E12.6 ct SctsB7 ? Number of background subtracted counts, in the hard energy band (2-12keV), corrected for the PSF (SCTS_B7) (1) 181-188 F8.5 ct e_SctsB7 ? Statistical 1 sigma error on SctsB7 (SCTSB7ERR) (1) 190-201 E12.6 ct SctsB6 ? Number of background subtracted counts, in the soft energy band (0.2-2keV), corrected for the PSF (SCTS_B6) (1) 203-210 F8.5 ct e_SctsB6 ? Statistical 1 sigma error on SctsB6 (SCTSB6ERR) (1) 212-223 E12.6 pix XimaB8 ? X position in the total band image in image pixels (XIMAB8) (1) 225-236 E12.6 pix YimaB8 ? Y position in the total band image in image pixels (YIMAB8) (1) 238-249 E12.6 pix XimaB7 ? X position in the hard band image in image pixels(XIMAB7) (1) 251-262 E12.6 pix YimaB7 ? Y position in the hard band image in image pixels(YIMAB7) (1) 264-275 E12.6 pix XimaB6 ? X position in the soft band image in image pixels(XIMAB6) (1) 277-288 E12.6 pix YimaB6 ? Y position in the soft band image in image pixels(YIMAB6) (1) 290-298 F9.6 pix ExtB8 ? Spatial extension of the source in the total energy band (EXT_B8) (1) 300-308 F9.6 pix e_ExtB8 ? Statistical one sigma error on ExtB8 (EXTB8ERR) (1) 310-318 F9.6 pix ExtB7 ? Spatial extension of the source in the hard energy band (EXT_B7) (1) 320-328 F9.6 pix e_ExtB7 ? Statistical one sigma error on ExtB7 (EXTB7ERR) (1) 330-338 F9.6 pix ExtB6 ? Spatial extension of the source in the soft energy band (EXT_B6) (1) 340-348 F9.6 pix e_ExtB6 ? Statistical one sigma error on ExtB6 (EXTB6ERR) (1) 350-361 F12.6 --- DetMLB8 ? Detection likelihood in the total (0.2-12keV) energy band (DETMLB8) (1) 363-374 F12.6 --- DetMLB7 ? Detection likelihood in the hard (2-12keV) energy band (DETMLB7) (1) 376-386 F11.6 --- DetMLB6 ? Detection likelihood in the soft (0.2-2keV) energy band (DETMLB6) (1) 388-398 F11.6 --- ExtMLB8 ? Likelihood of the source being extended in the total band (EXTMLB8) (1) 400-410 F11.6 --- ExtMLB7 ? Likelihood of the source being extended in the hard band (EXTMLB7) (1) 412-422 F11.6 --- ExtMLB6 ? Likelihood of the source being extended in the soft band (EXTMLB6) (1) 424-431 F8.6 ct/pix BgMapB8 ? Background value for the total band (BGMAPB8) (1) 433-440 F8.6 ct/pix BgMapB7 ? Background value for the hard band (BGMAPB7) (1) 442-449 F8.6 ct/pix BgMapB6 ? Background value for the soft band (BGMAPB6) (1) 451-459 F9.6 s ExpMapB8 ? Effective on-axis exposure time in the total energy band (EXPMAPB8) (1) 461-469 F9.6 s ExpMapB7 ? Effective on-axis exposure time in the hard energy band (EXPMAPB7) (1) 471-479 F9.6 s ExpMapB6 ? Effective on-axis exposure time in the soft energy band (EXPMAPB6) (1) 481-491 F11.6 fW/m2 FluxB8 ? Flux in the total energy (0.2-12keV) band (FLUX_B8) (1) 493-501 F9.6 fW/m2 e_FluxB8 ? Error in FluxB8 (FLUXB8ERR) (1) 503-513 F11.6 fW/m2 FluxB7 ? Flux in the total energy (2-12keV) band (FLUX_B7) (1) 515-524 F10.6 fW/m2 e_FluxB7 ? Error in FluxB7 (FLUXB7ERR) (1) 526-535 F10.6 fW/m2 FluxB6 ? Flux in the total energy (0.2-2keV) band (FLUX_B6) (1) 537-545 F9.6 fW/m2 e_FluxB6 ? Error in FluxB6 (FLUXB6ERR) (1) 547-556 F10.6 ct/s RateB8 ? Total band count rate (RATE_B8) (1) 558-566 F9.6 ct/s e_RateB8 ? Error in RateB8 (RATEB8ERR) (1) 568-577 F10.6 ct/s RateB7 ? Hard band count rate (RATE_B7) (1) 579-587 F9.6 ct/s e_RateB7 ? Error in RateB7 (RATEB7ERR) (1) 589-598 F10.6 ct/s RateB6 ? Soft band count rate (RATE_B6) (1) 600-608 F9.6 ct/s e_RateB6 ? Error in RateB6 (RATEB6ERR) (1) 610-618 F9.5 deg RAdegB8 ? Total band right ascension (J2000) (RA_B8) (1) 620-628 F9.5 deg DEdegB8 ? Total band declination (J2000) (DEC_B8) (1) 630-638 F9.5 arcsec ePosB8 ? Statistical error on total band position (RADECB8ERR) (1) 640-648 F9.5 deg GLONB8 ? Total band galactic longitude (LII_B8) (1) 650-658 F9.5 deg GLATB8 ? Total band galactic latitude (BII_B8) (1) 660-668 F9.5 deg RAdegB7 ? Hard band right ascension (J2000) (RA_B7) (1) 670-678 F9.5 deg DEdegB7 ? Hard band declination (J2000) (DEC_B7) (1) 680-688 F9.5 arcsec ePosB7 ? Statistical error on hard band position (RADECB7ERR) (1) 690-698 F9.5 deg GLONB7 ? Hard band galactic longitude (LII_B7) (1) 700-708 F9.5 deg GLATB7 ? Hard band galactic latitude (BII_B7) (1) 710-718 F9.5 arcsec RAdegB6 ? Soft band right ascension (J2000) (RA_B6) (1) 720-728 F9.5 deg DEdegB6 ? Soft band declination (J2000) (DEC_B6) (1) 730-737 F8.5 deg ePosB6 ? Statistical error on soft band position (RADECB6ERR) (1) 739-747 F9.5 deg GLONB6 ? Soft band galactic longitude (LII_B6) (1) 749-757 F9.5 deg GLATB6 ? Soft band galactic latitude (BII_B6) (1) 759-770 A12 --- Flag [CLEAN_SAMPLE] Flag for source included in the clean subset (VAL_FLAG) (1) 772-808 A37 --- SnameB8 Source name defined in the total band list (SRCNAME_B8) (1) 810-846 A37 --- SnameB7 Source name defined in the hard band list (SRCNAME_B7) (1) 848-884 A37 --- SnameB6 Source name defined in the soft band list (SRCNAME_B6) (1) 886-916 A31 --- XInameB8 Name of the image containing the total band detection (XIMNAME_B8) (1) 918-948 A31 --- XInameB7 Name of the image containing the hard band detection (XIMNAME_B7) (1) 950-980 A31 --- XInameB6 Name of the image containing the soft band detection (XIMNAME_B6) (1) 982 I1 --- Inext [0/1] Extended source flag (VER_INEXT) (1) 984 I1 --- Halo [0/1] Halo flag (VER_HALO) (1) 986 I1 --- HIbgnd [0/1] Bright region flag (VER_HIBGND) (1) 988 I1 --- Nredg [0] Not used in XMMSL2 (VER_NREDG) (1) 990 I1 --- Psusp [0/1] Inaccurate position flag (VER_PSUSP) (1) 992 I1 --- False [0/1] Catch-all for problems not included in the other flags (VER_FALSE) (1) 994-1031 A38 --- Com Suspect attitude reconstruction in RAF (FLAG_COMMENT) (1) 1033-1064 A32 --- Ident Cross-correlations of the positions of the slew sources (IDENT) (1) 1066-1081 A16 --- 1RXS Name of the closest Rosat All Sky Survey (RASS) source (RASSNAME) (1) 1083-1099 A17 --- Type Source type (ID_CATEGORY) (1) 1101-1108 A8 --- r_Type Reference for Type (ID_RESOURCE) (1) 1110-1119 F10.6 arcsec DistC ? Distance between the best match candidate and the slew survey source (ID_DIST) (1) 1121-1126 F6.3 arcsec DistR ? Distance from the best match ROSAT source and the slew source (RASS_DIST) (1) 1128-1130 A3 --- ModeID Observing mode of the EPIC-pn camera (MODE_ID) (1) 1132-1136 F5.1 ct/s ImBGRate Peak background count rate in the image from which the source was extracted (IMAGEBGRATE) (1) 1138-1147 F10.4 d MJDStart Start time of the subimage where the source is located in modified Julian date (MJD_START) (1) 1149-1158 F10.4 d MJDStop End time of the subimage where the source is located in modified Julian date (MJD_STOP) (1) 1160 I1 --- OPTLOAD [0/1] Warning flag indicating that the source may suffer from optical loading (VER_OPTLOAD) (1) 1162-1165 I4 --- FiltCt Number of counts found within a 1 arcminute radius about the source position after standard filtering is applied (FILT_CNTS) (1) 1167-1170 I4 --- UnfiltCt Number of counts found within a 1 arcminute radius about the source position with no filtering applied (UNFILT_CNTS) (1) 1172-1194 A23 --- USXMMSL1 Name of the same source in the previous XMMSL1 catalogue if existing (US_XMMSL1) (1) 1196-1201 I6 --- USExtras Corresponding SRCID value within the EXTraS LTV catalogue (US_EXTRAS) (1) 1203-1211 E9.3 fW/m2 XMMSLFX Stellar X-ray flux of the XMMSL2 source (2) 1213-1214 I2 --- NumDet Number of detections of the source 1216-1217 I2 --- NumMatch Number of stellar counterparts 1219-1220 I2 --- Priority [1/31] Priority of the counterpart 1222-1225 A4 --- Catalog [TLBMG ] Catalogs of the counterpart (3) 1227-1231 F5.2 arcsec r [0.04/29.66] Separation between XMMSL2 and stellar source 1233-1237 F5.2 % Probr Matching probability 1239-1257 A19 --- GaiaID ? Identifier of the Gaia DR1 catalog 1259-1269 A11 --- Tycho2ID ? Identifier of the Tycho2 catalog 1271-1274 I4 --- HR ? Identifier of the BrightStar catalog 1276-1288 A13 --- PM ? Identifier of the SUPERBLINK catalog 1290-1305 A16 --- 2MASSID ? Identifier of the 2MASS catalog 1307-1316 F10.6 deg MtchRA Right Ascension of the stellar counterpart (4) 1318-1327 F10.6 deg MtchDE Declination of the stellar counterpart (4) 1329-1334 F6.2 mas e_MtchRA ? Statistical error on MtchRA 1336-1341 F6.2 mas e_MtchDE ? Statistical error on MtchDEC 1343-1349 F7.1 mas/yr pmRA ? Proper motion in Right Ascension 1351-1357 F7.1 mas/yr pmDE ? Proper motion in Declination 1359-1362 F4.1 mas/yr e_pmRA ? Statistical error on pmRA 1364-1367 F4.1 mas/yr e_pmDE ? Statistical error on pmDE 1369-1374 F6.3 mag BTmag ? Magnitude in the Tycho2 BT band 1376-1380 F5.3 mag e_BTmag ? Statistical error on BTmag 1382-1387 F6.3 mag VTmag ? Magnitude in the Tycho2 VT band 1389-1393 F5.3 mag e_VTmag ? Statistical error on VTmag 1395-1400 F6.3 mag Bmag ? Magnitude in the B band 1402-1407 F6.3 mag Vmag ? Magnitude in the V band 1409-1414 F6.3 mag Gmag ? Magnitude in the G band of Gaia DR1 1416-1421 F6.3 mag Jmag ? Magnitude in the J band of 2MASS 1423-1427 F5.3 mag e_Jmag ? Statistical error on Jmag 1429-1434 F6.3 mag Hmag ? Magnitude in the H band of 2MASS 1436-1440 F5.3 mag e_Hmag ? Statistical error on Hmag 1442-1447 F6.3 mag Kmag ? Magnitude in the K band of 2MASS 1449-1453 F5.3 mag e_Kmag ? Statistical error on Kmag 1455-1457 A3 --- Qflg ? Quality of the JHK photometry (5) 1459-1461 A3 --- Rflg ? Method of the JHK photometry (5) 1463-1465 A3 --- Bflg ? JHK components fit to source (5) 1467-1469 A3 --- Cflg ? Flag for contamination, confusion, etc (5) 1471-1473 A3 --- Xflg ? Extended source contamination (5) 1475-1481 I7 --- XSCID ? Identifier of the 2MASS-XSC (5) 1483-1490 F8.5 arcsec plx ? Trigonometric parallax 1492-1498 F7.5 arcsec e_plx ? Statistical error on plx 1500-1502 A3 --- CCDM ? Component of multiple star system 1504-1518 A15 --- SpType ? Spectral type 1520-1525 F6.3 mag mbol ? Bolometric magnitude 1527-1535 E9.3 fW/m2 Fbol ? Bolometric flux 1537-1541 I5 K Teff ? Effective temperature 1543-1549 F7.3 mag VMAG ? Absolute magnitude in the V band 1550 A1 --- n_VMAG [i] i for infinity 1551-1557 F7.3 mag Mbol ? Absolute bolometric magnitude 1558 A1 --- n_Mbol [i] i for infinity 1559-1567 E9.3 W Lbol ? Bolometric luminosity 1568 A1 --- n_Lbol [i] i for infinity 1569-1577 E9.3 W LX ? X-ray luminosity 1578 A1 --- n_LX [i] i for infinity 1579-1585 A7 --- StFlg [AGOEDPCHXTS ] Stellar flag (6) 1587-1606 A20 --- 2RXSID ? Identifier of the RASS catalog (2RXS) 1608-1612 F5.2 arcsec 2RXSr ? Separation between XMMSL2 and RASS source 1614-1622 E9.3 fW/m2 2RXSFX ? X-ray flux of the RASS catalog 1624-1655 A32 --- SBDID ? Identifier adopted from SIMBAD 1657-1661 F5.2 arcsec SBDr ? Separation between XMMSL2 and SIMBAD source 1663-1679 A17 --- SBDotype ? Classification adopted from SIMBAD
Note (1): Adopted from the XMMSL2 catalog (see IX/53 for details). Note (2): For multiply detected sources, the median X-ray flux is adopted. Note (3): Catalogs of the counterpart as follows: G = Gaia DR1 catalog, Cat. I/337 T = Tycho2 catalog, Cat. I/259 M = 2MASS catalog, Cat. II/246 L = Lepine catalog, Cat. J/AJ/142/138 B = BrightStar catalog, Cat. V/50 Note (4): Corrected for proper motion to the epoch of the XMMSL2 observation. Note (5): Adopted from the 2MASS catalog (see II/246 for details). Note (6): Stellar flag as follows: A = Accretor warning G = Extragalactic warning O = Optical loading E = Extended source D = Missing 2MASS detection P = Erroneous 2MASS photometry C = Extrem color H = Hard band detection only X = Persistent high X-ray activity T = Transient X-ray source S = High X-ray activity in the slew
Acknowledgements: Sebastian Freund, Sebastian.Freund(at)uni-hamburg.de
(End) Patricia Vannier [CDS] 29-Jan-2018
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