ACDS V10.0 - Mon Dec 02 12:33:50 CET 2024
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Detailed Description of IX/69 :
XMM-Newton Serendipitous Source Catalogue 4XMM-DR13 (Webb+, 2023)
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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/69 XMM-Newton Serendipitous Source Catalogue 4XMM-DR13 (Webb+, 2023)
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The XMM-Newton serendipitous survey.
IX. The fourth XMM-Newton serendipitous source catalogue.
Webb N.A., Coriat M., Traulsen I., Ballet J., Motch C., Carrera F.J.,
Koliopanos F., Authier J., de la Calle I., Ceballos M.T., Colomo E.,
Chuard D., Freyberg M., Garcia T., Kolehmainen M., Lamer G., Lin D.,
Maggi P., Michel L., Page C.G., Page M.J., Perea-Calderon J.V.,
Pineau F.-X., Rodriguez P., Rosen S.R., Santos Lleo M., Saxton R.D.,
Schwope A., Tomas L., Watson M.G., Zakardjian A.
<XMM-SSC, Leicester, UK; Astron. Astrophys. 641, A136 (2020) >
=2020A&A...641A.136W
=2023yCat.9069....0X
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ADC_Keywords: X-ray sources ; Surveys
Mission_Name: XMM
Keywords: catalogs - astronomical data bases - surveys - X-rays: general
Abstract:
Sky surveys produce enormous quantities of data on extensive regions
of the sky. The easiest way to access this information is through
catalogues of standardised data products. XMM-Newton has been
surveying the sky in the X-ray, ultra-violet and optical bands for 22
years.
The XMM-Newton Survey Science Centre has been producing standardised
data products and catalogues to facilitate access to the serendipitous
X-ray sky.
4XMM-DR13 contains 983948 X-ray detections above the processing
likelihood threshold of 6. These X-ray detections relate to 656997
unique X-ray sources.
Description:
The 4XMM-DR13 catalogue contains source detections drawn from 13243
XMM-Newton EPIC observations, covering an energy interval from 0.2keV
to 12keV. These observations were made between 2000 February 3 and
2022 December 31 and all datasets were publicly available by 2022
December 31, but not all public observations are included in this
catalogue.
The following table gives an overview of the statistics of the
catalogue in comparison with the 4XMM-DR11 catalogue.
---------------------------------------------------------------------------
4XMM-DR13 4XMM-DR12 Increment
---------------------------------------------------------------------------
Number of observations 13243 12712 531
Number of 'clean' observations 10895 10543 352
(i.e., observation class < 3)
Observing interval 03-Feb-00 03-Feb-00
31-Dec-22 31-Dec-20 1 yr
Sky coverage, taking overlaps into account
( >= 1ksec exposure) 1328 sq.deg 1283 sq.deg 45 sq.deg
Number of detections 983948 939270 44678
Number of 'clean' detections
(i.e., summary flag < 3) 854095 821953 32142
Number of unique sources 656997 630347 26650
Number of 'cleanest' (summary flag = 0, 20971 20169 802
not in high-background fields) extended
detections
Number of detections with spectra 353821 337058 16763
Number of detections with timeseries 535386 336776 16762
Number of detections where probability 8029 7697 332
of timeseries being constant is
<1x10-5
The production and content of the 4XMM catalogue is described in the
the 4XMM-DR13 User Guide at
http://xmmssc.irap.omp.eu/Catalogue/
4XMM-DR13/4XMM-DR13CatalogueUser_Guide.html
The slimline version of the catalogue (file "xmm4d13s.dat") contains
one row per unique source (while the the main catalogue has one row
per detection) and thus has 656997 rows. There are 45 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.
Should you use the catalogues 4XMM-DR13 or 4XMM-DR13s for your
research and publish the results, please use the acknowledgement below
and cite the relevant paper, Webb et al. (2020A&A...641A.136W).
File Summary:
FileName Lrecl Records Explanations
× 80 . This file
× ReadMe 80 . This file
× xmm4d13s.dat 563 656997 The 4XMM-DR13 Catalog, "slim" version
× xmm4d13s.fit 2880 58639 Fits version of 4XMM-DR13 Catalog, "slim"
× summary.dat 160 13243 List of observations
× xmm4d13.fit 2880 512199 Full 4XMM-DR13 Catalog (854095 detections)
See also:
IX/68 : XMM-Newton Serendipitous Source Catalogue 4XMM-DR12 (Webb+, 2023)
IX/64 : 4XMM-DR10s serendipitous source catalogue from stacks (Traulsen+ 2022)
http://xmmssc-www.star.le.ac.uk/Catalogue : XMM-Newton Home Page
http://xmmssc.irap.omp.eu/Catalogue/4XMM-DR9/4XMM_DR9.html :
4XMM 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
B/xmm : XMM-Newton Observation Log (XMM-Newton Science Operation Center)
Byte-by-byte Description of file: xmm4d13s.dat
Bytes Format Units Label Explanations
1- 15 I15 --- Source [200001101010001/209119905010217]
Unique source index (SRCID)
17- 20 A4 --- --- [4XMM]
22- 37 A16 --- 4XMM Unique source name (JHHMMSS.s+DDMMSS) (IAUNAME)
39- 48 F10.6 deg RAdeg Mean source right ascension (ICRS) (SC_RA)
50- 59 F10.6 deg DEdeg Mean source declination (ICRS) (SC_DEC)
61- 69 F9.6 arcsec ePos [0.03/20] Mean error on position (SC_POSERR)
71- 82 E12.6 --- srcML Source detection likelihood (SCDETML) (2)
84- 95 E12.6 mW/m2 Flux1 Mean flux in 0.2-0.5keV band (SCEP1_FLUX)
97-108 E12.6 mW/m2 e_Flux1 Mean error on Flux1 (SCEP1FLUXERR)
110-121 E12.6 mW/m2 Flux2 Mean flux in 0.5-1.0keV band (SCEP2_FLUX)
123-134 E12.6 mW/m2 e_Flux2 Mean error on Flux2 (SCEP2FLUXERR)
136-147 E12.6 mW/m2 Flux3 Mean flux in 1.0-2.0keV band (SCEP3_FLUX)
149-160 E12.6 mW/m2 e_Flux3 Mean error on Flux3 (SCEP3FLUXERR)
162-173 E12.6 mW/m2 Flux4 Mean flux in 2.0-4.5keV band (SCEP4_FLUX)
175-186 E12.6 mW/m2 e_Flux4 Mean error on Flux4 (SCEP4FLUXERR)
188-199 E12.6 mW/m2 Flux5 Mean flux in 4.5-12keV band (SCEP5_FLUX)
201-212 E12.6 mW/m2 e_Flux5 Mean error on Flux5 (SCEP5FLUXERR)
214-225 E12.6 mW/m2 Flux8 Mean flux in 0.2-12keV band (SCEP8_FLUX)
227-238 E12.6 mW/m2 e_Flux8 Mean error on Flux8 (SCEP8FLUXERR)
240-251 E12.6 mW/m2 Flux9 ?=- Mean flux in 0.5-4.5keV band (SCEP9_FLUX)
253-264 E12.6 mW/m2 e_Flux9 ?=- Mean error on Flux9 (SCEP9FLUXERR)
266-274 F9.6 --- HR1 [-1/1]?=- Hardness ratio, bands 1,2 (SC_HR1) (1)
276-287 E12.6 --- e_HR1 ?=- Mean error on HR1 (SCHR1ERR)
289-297 F9.6 --- HR2 [-1/1]?=- Hardness ratio, bands 2,3 (SC_HR2) (1)
299-310 E12.6 --- e_HR2 ?=- Mean error on HR2 (SCHR2ERR)
312-320 F9.6 --- HR3 [-1/1]?=- Hardness ratio, bands 3,4 (SC_HR3) (1)
322-333 E12.6 --- e_HR3 ?=- Mean error on HR3 (SCHR3ERR)
335-343 F9.6 --- HR4 [-1/1]?=- Hardness ratio, bands 4,5 (SC_HR4) (1)
345-356 E12.6 --- e_HR4 ?=- Mean error on HR4 (SCHR4ERR)
358-366 F9.6 arcsec ext Total band extent (SC_EXTENT)
368-377 F10.6 arcsec e_ext ?=- Mean error on ext (SCEXTERR)
379-390 E12.6 --- extML Detection likelihood of the
extended source (SCEXTML) (3)
392-399 F8.6 --- Cst [0/1]?=- Constant probability (SC_CHI2PROB) (4)
401-412 F12.6 --- Fvar ?=- fractional excess variance of
the unique source (SC_FVAR) (6)
414-425 F12.6 --- e_Fvar ?=- Mean error on Fvar (SC_FVARERR)
427 I1 --- V [0/1] Variability flag (V=1) (SCVARFLAG)
429 I1 --- S [0/4] summary flag, 0=best (SCSUMFLAG) (5)
431-442 E12.6 mW/m2 F8min Minimum flux in 0.5-4.5keV band (SCEP8_FMIN)
444-455 E12.6 mW/m2 e_F8min Mean error on F8min (SCEP8FMINERR)
457-468 E12.6 mW/m2 F8max Maximum flux in 0.5-4.5keV band (SCEP8_FMAX)
470-481 E12.6 mW/m2 e_F8max Mean error on F8max (SCEP8FMAXERR)
483-492 F10.4 d MJD0 [51575/59912] Date of first observation (MJD)
(MJD_FIRST)
494-503 F10.4 d MJD1 [51575/59913] Date of last observation (MJD)
(MJD_LAST)
505-506 I2 --- Nd [1/90]? Number of detections (N_DETECTIONS)
508 I1 --- c [0/1] (CONFUSED) Confusion flag (CONFUSED) (7)
510-563 A54 --- uIRAP URL for details at IRAP (WEBPAGE_URL)
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 [27/4207] Satellite revolution number (REVOLUT)
6- 15 I010 --- ObsID XMM Observation number (Cat. B/xmm) (OBS_ID)
17- 19 I03 --- iODF [1/10] Data File (ODF) number (ODF_VERS)
21- 30 F10.6 deg RAdeg field Right Ascension (J2000) (RA)
32- 41 F10.6 deg DEdeg field Declination (J2000) (DEC)
43- 52 F10.6 deg PApnt Actual pointed position of the optical axis
(PA_PNT)
54- 72 A19 --- Target Target name (TARGET)
74- 83 F10.4 d MJD0 Start observation date (MJD_START)
85- 94 F10.4 d MJD1 End observation date (MJD_STOP)
96 I1 --- Q [0/5] Observations quality (OBS_CLASS) (1)
98-100 I3 --- Nd [1/738] Number of detections in field (NDET)
102-104 I3 --- Ng [0/419] Number of good detections in field
(NDETGOOD)
106 I1 --- Np [1/5]? Number of PN exposures merged (PN_NEXP)
108-110 A3 --- f.PN Filter of the PN exposure(s) (PN_FILT) (2)
112-115 A4 --- m.PN Mode of the PN exposure(s) (PN_MODE) (3)
117-122 I6 s t.PN ?=- Total PN exposure time (PN_TEXP)
124 I1 --- N1 [1/5]? Number of M1 exposures merged (M1_NEXP)
126-128 A3 --- f.M1 Filter of the M1 exposure(s) (M1_FILT) (2)
130-134 A5 --- m.M1 Mode of the M1 exposures (M1_MODE) (3)
136-141 I6 s t.M1 ?=- Total M1 exposure time (M1_TEXP)
143 I1 --- N2 [1/5]? Number of M2 exposures merged (M2_NEXP)
145-147 A3 --- f.M2 Filter of the M2 exposure(s) (M2_FILT) (2)
149-153 A5 --- m.M2 Mode of the M2 exposures (M2_MODE) (3)
155-160 I6 s t.M2 ?=- Total M2 exposure time (M2_TEXP)
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): EPIC camera observing modes of catalogue observations:
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
PN modes:
PFWE = Prime Full Window Extended
PFW = Prime Full Window
PLW = Prime Large Window
History:
Copied at http://xmmssc.irap.omp.eu/Catalogue/4XMM-DR13/4XMM_DR13.html
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(End) Patricia Vannier [CDS] 10-Aug-2023