ACDS V10.0 - Wed Apr 17 13:39:55 CEST 2019
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Detailed Description of IX/55 :
XMM-Newton Serendipitous Source Catalogue 3XMM-DR8 (XMM-SSC, 2018)
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Note : this is the description file of the original catalog.
This HTML page corresponds well to the original description, but some minor
changes in the format may have been introduced in the FITS output
files in order to allow for arithmetic operations on quantities
such as coordinates and times. h:m:s and d:m:s units are normally
converted into degrees, and YYYY-MM-DD into julian days.
Similarly, some slight changes may have been introduced in the
units; the value given in the HTML files supersedes the value indicated in the ReadMe
file for this catalogue.
IX/55 XMM-Newton Serendipitous Source Catalogue 3XMM-DR8 (XMM-SSC, 2018)
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The XMM-Newton serendipitous survey.
VII. The third XMM-Newton serendipitous source catalogue.
Rosen S.R., Webb N.A., Watson, M.G., Ballet J., Barret D., Braito V.,
Carrera F.J., Ceballos M.T., Coriat M., Della Ceca R., Denkinson G.,
Esquej P., Farrell S.A., Freyberg M., Grise F., Guillout P., Heil L.,
Law-Green D., Lamer G., Lin D., Martino R., Michel L., Motch C.,
Nebot Gomez-Moran A., Page C.G., Page K., Page M., Pakull M.W., Pye J.,
Read A., Rodriguez P., Sakano M., Saxton R., Schwope A., Scott A.E.,
Sturm R., Traulsen I., Yershov V., Zolotukhin I.
<XMM-SSC, Leicester, UK; Astron. Astrophys. 590, A1 (2016)>
=2019yCat.9055....0R
=2016A&A...590A...1R
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ADC_Keywords: X-ray sources ; Surveys
Mission_Name: XMM
Keywords: catalogs - astronomical data bases - surveys - X-rays: general
Description:
The 3XMM-DR8 catalogue contains source detections drawn from 10242
XMM-Newton EPIC observations, covering an energy interval from 0.2 keV
to 12 keV. These observations were made between 2000 February 3 and
2017 November 30 and all datasets were publicly available by 2017
December 31, but not all public observations are included in this
catalogue (see below for more information).
Should you use the catalogue for your research and publish the
results, please use the acknowledgement below and cite the paper
describing 3XMM (Rosen, Webb, Watson et al., 2016A&A...590A...1R).
This research has made use of data obtained from the 3XMM XMM-Newton
serendipitous source catalogue compiled by the 10 institutes of the
XMM-Newton Survey Science Centre selected by ESA.
The following table gives an overview of the statistics of the
catalogue in comparison with the 3XMM-DR7 catalogue.
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3XMM-DR8 3XMM-DR7 Increment
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Number of observations 10242 9710 532
Number of 'clean' observations 6496 6164 332
(i.e., observation class < 3)
Observing interval 03-Feb-00 03-Feb-00
30-Nov-17 15-Dec-16 1 yr
Sky coverage, taking overlaps into account
( >=1ksec exposure) 1089sq.deg 1032sq.deg 57sq.deg
Number of detections 775153 727790 47363
Number of 'clean' detections
(i.e., summary flag < 3) 633733 596268 37465
Number of unique sources 531454 499266 32188
Number of 'cleanest' (summary flag = 0, 12256 11220 1036
not in high-background fields) extended
detections
Number of detections with spectra 173277 162082 11195
Number of detections with timeseries 173208 162045 11163
5934 5631 303
Number of detections where probability
of timeseries being constant is
<1x10-5
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The production and content of the 3XMM catalogue is described in the
the 3XMM-DR8 User Guide at
http://xmmssc.irap.omp.eu/Catalogue/3XMM-DR8/3XMM-DR8_Catalogue_User_Guide.html
The slimline version of the catalogue (file "xmm3r8s.dat") contains
one row per unique source (while the the main catalogue has one row
per detection) and thus has 531454 rows. There are 44 columns,
essentially those containing information about the unique sources. The
catalogue also contains a column with links to the IRAP catalogue
server summary pages. In the case of sources with multiple detections,
the summary page of the best detection is selected (i.e., the
detection with the largest exposure time, summed over all cameras),
and the summary page gives cross-links to the other detections.
File Summary:
FileName Lrecl Records Explanations
× 80 . This file
× ReadMe 80 . This file
× xmm3r8s.dat 549 531454 The 3XMM-DR8 Catalog, "slim" version
× xmm3r8.fit 2880 46696 Full 3XMM-DR8 Catalog (727790 detections)
× summary.dat 127 10242 List of observations
See also:
http://xmmssc-www.star.le.ac.uk/Catalogue : XMM-Newton Home Page
http://xmmssc.irap.omp.eu/Catalogue/3XMM-DR8/3XMM_DR8.html :
3XMM Home Page
http://xmmssc-www.star.le.ac.uk/ : XMM-Newton Survey Science Centre,
University of Leicester
http://xmm.vilspa.esa.es/ : XMM-Newton Science Operations Centre
http://xcatdb.u-strasbg.fr/xcat-db/ : XCAT-DB at SSC institute, Strasbourg
J/A+A/493/339 : XMM-Newton serendipitous Survey V. (Watson+, 2009)
B/xmm : XMM-Newton Observation Log (XMM-Newton Science Operation Center)
Byte-by-byte Description of file: xmm3r8s.dat
Bytes Format Units Label Explanations
1- 15 I15 --- Source [200001101010001/207957124010063]
(SRCID) Unique source index
17- 20 A4 --- --- [3XMM]
22- 37 A16 --- 3XMM (IAUNAME) Unique source name (JHHMMSS.s+DDMMSS)
39- 48 F10.6 deg RAdeg (SC_RA) Mean source right ascension (ICRS)
50- 59 F10.6 deg DEdeg (SC_DEC) Mean source declination (ICRS)
61- 69 F9.6 arcsec ePos [0.03/20] (SC_POSERR) Mean error on position
71- 82 E12.6 --- srcML (SCDETML) Source detection likelihood (2)
84- 95 E12.6 mW/m2 Flux1 (SCEP1_FLUX) Mean flux in 0.2-0.5keV band
97-108 E12.6 mW/m2 e_Flux1 (SCEP1FLUXERR) Mean error on Flux1
110-121 E12.6 mW/m2 Flux2 (SCEP2_FLUX) Mean flux in 0.5-1.0keV band
123-134 E12.6 mW/m2 e_Flux2 (SCEP2FLUXERR) Mean error on Flux2
136-147 E12.6 mW/m2 Flux3 (SCEP3_FLUX) Mean flux in 1.0-2.0keV band
149-160 E12.6 mW/m2 e_Flux3 (SCEP3FLUXERR) Mean error on Flux3
162-173 E12.6 mW/m2 Flux4 (SCEP4_FLUX) Mean flux in 2.0-4.5keV band
175-186 E12.6 mW/m2 e_Flux4 (SCEP4FLUXERR) Mean error on Flux4
188-199 E12.6 mW/m2 Flux5 (SCEP5_FLUX) Mean flux in 4.5-12keV band
201-212 E12.6 mW/m2 e_Flux5 (SCEP5FLUXERR) Mean error on Flux5
214-225 E12.6 mW/m2 Flux8 (SCEP8_FLUX) Mean flux in 0.2-12keV band
227-238 E12.6 mW/m2 e_Flux8 (SCEP8FLUXERR) Mean error on Flux8
240-251 E12.6 mW/m2 Flux9 ? (SCEP9_FLUX) Mean flux in 0.5-4.5keV band
253-264 E12.6 mW/m2 e_Flux9 ? (SCEP9FLUXERR) Mean error on Flux9
266-274 F9.6 --- HR1 [-1/1]? (SC_HR1) Hardness ratio, bands 1,2 (1)
276-287 E12.6 --- e_HR1 ? (SCHR1ERR) Mean error on HR1
289-297 F9.6 --- HR2 [-1/1]? (SC_HR2) Hardness ratio, bands 2,3 (1)
299-310 E12.6 --- e_HR2 ? (SCHR2ERR) Mean error on HR2
312-320 F9.6 --- HR3 [-1/1]? (SC_HR3) Hardness ratio, bands 3,4 (1)
322-333 E12.6 --- e_HR3 ? (SCHR3ERR) Mean error on HR3
335-343 F9.6 --- HR4 [-1/1]? (SC_HR4) Hardness ratio, bands 4,5 (1)
345-356 E12.6 --- e_HR4 ? (SCHR4ERR) Mean error on HR4
358-366 F9.6 arcsec ext (SC_EXTENT) Total band extent
368-379 E12.6 --- extML (SCEXTML) Detection likelihood of the
extended source (3)
381-388 F8.6 --- Cst [0/1]? (SC_CHI2PROB) Constant probability (4)
390-399 F10.6 --- Fvar ? (SC_FVAR) fractional excess variance of
the unique source (6)
401-411 F11.6 --- e_Fvar ? (SC_FVARERR) Mean error on Fvar
413 I1 --- V [0/1] (SCVARFLAG) Variability flag (V=1)
415 I1 --- S [0/4] (SCSUMFLAG) summary flag, 0=best (5)
417-428 E12.6 mW/m2 F8min (SCEP8_FMIN) Minimum flux in 0.5-4.5keV band
430-441 E12.6 mW/m2 e_F8min (SCEP8FMINERR) Mean error on F8min
443-454 E12.6 mW/m2 F8max (SCEP8_FMAX) Maximum flux in 0.5-4.5keV band
456-467 E12.6 mW/m2 e_F8max (SCEP8FMAXERR) Mean error on F8max
469-478 F10.4 d MJD0 [51577/58088] (MJD_FIRST) Date of first
observation (MJD)
480-489 F10.4 d MJD1 [51577/58088] (MJD_LAST) Date of last
observation (MJD)
491-492 I2 --- Nd [1/59]? (N_DETECTIONS) Number of detections
494 I1 --- c [0/1] (CONFUSED) Confusion flag (7)
496-549 A54 --- uIRAP (WEBPAGE_URL) URL for details at IRAP
Note (1): The hardness ratio is defined as (F2-F1)/(F2+F1)
if F2 is the flux in the harder band (the hardness ratio is
therefore -1 for softest sources and +1 for hardest sources).
The energy bands are:
1 = 0.2 - 0.5 keV (narrow band)
2 = 0.5 - 1.0 keV (narrow band)
3 = 1.0 - 2.0 keV (narrow band)
4 = 2.0 - 4.5 keV (narrow band)
5 = 4.5 - 12.0 keV (narrow band)
6 = 0.2 - 2.0 keV = soft broad band, no images made
7 = 2.0 - 12.0 keV = hard broad band, no images made
8 = 0.2 - 12.0 keV = total band
9 = 0.5 - 4.5 keV = XID band
Note (2): defined as the maximum of the likelihoods of all detections
of this source.
Note (3): defined as the average of the extent likelihoods of all
detections of this source.
Note (4): {chi}2 probability that the unique source as detected by
any of the observations is constant, that is, the minimum value
of the EPIC probabilities in each detection.
Note (5): the summary flag of the source is derived from the EPIC flag,
and is assigned the following values:
0 = good: none of the EPIC flags was set.
1 = source parameters may be affected: at least one of the EPIC warning
flags was set, but no possible-spurious detection flag is set.
2 = possibly spurious source: at least one of the possible-spurious
detection flags was set but not the manual flag
3 = source located in a area where spurious detection may occur.
4 = source located in a area where spurious detection may occur and is
possibly spurious.
Note (6): The fractional excess variance of the unique source. It is the
value corresponding to the exposure and instrument that shows the
lowest probability of being constant.
Note (7): This flag (1=true, 0=false) signifies that the 3-{sigma} error
circle of a detection within this unique source overlaps the 3-{sigma}
error circle of a nearby unique source. As such, it is an indicator of
possible confusion (uncertainty) about the assignment of detections
between sources.
Byte-by-byte Description of file: summary.dat
Bytes Format Units Label Explanations
1- 4 I04 --- Rev [28/3292] (REVOLUT) Satellite revolution number
6- 15 I010 --- ObsID (OBS_ID) XMM Observation number (Cat. B/xmm)
17- 19 I03 --- iODF [1/10] (ODF_VERS) Data File (ODF) number
21- 30 F10.6 deg RAdeg (RA) field Right Ascension (J2000)
32- 41 F10.6 deg DEdeg (DEC) field Declination (J2000)
43- 61 A19 --- Target (TARGET) name
63 I1 --- Q [0/5] (OBS_CLASS) Observations quality (1)
65- 67 I3 --- Nd [1/731] (NDET) Number of detections in field
69- 71 I3 --- Ng [0/391] (NDETGOOD) Number of good detections
in field
73 I1 --- Np [1/5]? (PN_NEXP) Number of PN exposures merged
75- 77 A3 --- f.PN (PN_FILT) Filter of the PN exposure(s) (2)
79- 82 A4 --- m.PN (PN_MODE) Mode of the PN exposure(s) (3)
84- 89 I6 s t.PN ?=- (PN_TEXP) Total PN exposure time
91 I1 --- N1 [1/5]? (M1_NEXP) Number of M1 exposures merged
93- 95 A3 --- f.M1 (M1_FILT) Filter of the M1 exposure(s) (2)
97-101 A5 --- m.M1 (M1_MODE) Mode of the M1 exposures (3)
103-108 I6 s t.M1 ?=- (M1_TEXP) Total M1 exposure time
110 I1 --- N2 [1/5]? (M2_NEXP) Number of M2 exposures merged
112-114 A3 --- f.M2 (M2_FILT) Filter of the M2 exposure(s) (2)
116-120 A5 --- m.M2 (M2_MODE) Mode of the M2 exposures (3)
122-127 I6 s t.M2 ?=- (M2_TEXP) Total M2 exposure time
Note (1): Quality classification of the whole observation based on the area
flagged as bad in the manual flagging process
Note (2): EPIC camera filters of catalogue observations:
Med=MEDIUM, Tn1=THIN1, Tn2=THIN2, Tck=THICK, Opn=OPEN,
Note (3): MOS modes:
PFW = Prime Full Window
PPW2 = Prime Partial W2
PPW3 = Prime Partial W3
PPW4 = Prime Partial W4
PPW5 = Prime Partial W5
FU = Fast Uncompressed
FC = Fast Compressed
PPRFS = Prime Partial Refreshed Frame Store
History:
From https://www.cosmos.esa.int/web/xmm-newton/xsa#download
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(End) Patricia Vannier [CDS] 30-Jan-2019