J/A+A/493/339 XMM-Newton serendipitous Survey. V. (Watson+, 2009)
The XMM-Newton serendipitous Survey.
V. The second XMM-Newton serendipitous source catalogue.
Watson M.G., Schroder A.C., Fyfe D., Page C.G., Lamer G., Mateos S.,
Pye J., Sakano M., Rosen S., Ballet J., Barcons X., Barret D., Boller T.,
Brunner H., Brusa M., Caccianiga A., Carrera F.J., Ceballos M.,
Della Ceca R., Denby M., Denkinson G., Dupuy S., Farrell S., Fraschetti F.,
Freyberg M.J., Guillout P., Hambaryan V., Maccacaro T., Mathiesen B.,
McMahon R., Michel L., Motch C., Osborne J.P., Page M., Pakull M.W.,
Pietsch W., Saxton R., Schwope A., Severgnini P., Simpson M., Sironi G.,
Stewart G., Stewart I.M., Stobbart A-M., Tedds J., Warwick R., Webb N.,
West R., Worrall D., Yuan W.
<Astron. Astrophys. 493, 339 (2009)>
=2009A&A...493..339W 2009A&A...493..339W
ADC_Keywords: Surveys ; X-ray sources
Keywords: catalogues - surveys - X-rays general
Abstract:
Pointed observations with XMM-Newton provide the basis for creating
catalogues of X-ray sources detected serendipitously in each field.
This paper describes the creation and characteristics of the 2XMM
catalogue.
The 2XMM catalogue has been compiled from a new processing of the
XMM-Newton EPIC camera data. The main features of the processing
pipeline are described in detail.
The catalogue, the largest ever made at X-ray wavelengths, contains
246897 detections drawn from 3491 public XMM-Newton observations over
a 7-year interval, which relate to 191870 unique sources. The
catalogue fields cover a sky area of more than 500deg2. The
non-overlapping sky are a is ∼360deg2 (∼1% of the sky) as many
regions of the sky are observed more than once by XMM-Newton. The
catalogue probes a large sky area at the flux limit where the bulk of
the objects that contribute to the X-ray background lie and provides a
major resource for generating large, well-defined X-ray selected
source samples, studying the X-ray source population and identifying
rare object types. The main characteristics of the catalogue are
presented, including its photometric and astrometric properties
The 2XMMi catalogue is available as Cat. IX/40 in VizieR.
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
obs.dat 140 3491 XMM-Newton observations and exposures included
in the 2XMM catalogue (IX/40)
(table D1 in the paper)
table1.dat 98 10 Data modes of XMM-Newton exposures included in
the 2XMM catalogue
target.dat 166 3504 2XMM catalogue fields and targets identifications
(table D2 in the paper)
notes.dat 80 149 Notes
--------------------------------------------------------------------------------
See also:
IX/40 : XMM-Newton 2nd Inc. Source Cat. (2XMMi) (XMM-SSC, 2008)
J/A+A/428/383 : XMM-Newton Bright Serendipitous Survey (Della Ceca+, 2004)
J/A+A/469/27 : XMM-Newton serendipitous survey. III (Carrera+, 2007)
J/A+A/476/1191 : XMM-Newton serendipitous survey. IV (Barcons+, 2007)
Byte-by-byte Description of file: obs.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 4 I4 --- Rev Satellite revolution number
(consecutive in time)
6- 15 I010 --- ObsID Observation number
17- 19 I3 --- ODF ODF (Observation Data File) version number
21- 30 F10.6 deg RAdeg Right ascension in decimal degrees (J2000)
32- 41 F10.6 deg DEdeg Declination in decimal degrees (J2000)
43- 62 A20 --- Target Target name
64 I1 --- q_Target [0/5] Quality classification, 0=best (1)
66- 68 I3 --- Ndet Number of detections in the field
70- 72 I3 --- Ngood Number of good detections in the field
74- 76 A3 --- --- (PN[)
77 I1 --- PNexp [1/3]? Number of the PN exposures merged for
the source detection
78 A1 --- --- (])
80- 82 A3 --- PNft Filter of the PN exposures (2)
84- 87 A4 --- PNmd PN observing mode (3)
89- 94 I6 s PNtm ? Total exposure time of the PN exposures
96- 98 A3 --- --- (M1[)
99 I1 --- M1exp [1/3]? Number of the MOS1 exposures merged for
the source detection
100 A1 --- --- (])
102-104 A3 --- M1ft Filter of the MOS1 exposures (2)
106-110 A5 --- M1md MOS1 observing mode (3)
112-117 I6 s M1tm ? Total exposure time of the MOS1 exposures
119-121 A3 --- --- (M2[)
122 I1 --- M2exp [1/3]? Number of the MOS2 exposures merged for
the source detection
123 A1 --- --- (])
125-127 A3 --- M2ft Filter of the MOS2 exposures (2)
129-133 A5 --- M2md MOS2 observing mode (3)
135-140 I6 s M2tm ? Total exposure time of the MOS2 exposures
--------------------------------------------------------------------------------
Note (1): Quality classification of the whole observation based on the area
flagged as bad in the manual flagging process as compared to the whole
detection area, see Sect 7.4. The quality flag as follows:
0 = nothing has been flagged
1 = 0%<area<0.1% of the total detection mask has been flagged
2 = 0.1%≤area<1% has been flagged
3 = 1%≤ area<10% has been flagged
4 = 10%≤area<100% has been flagged
5 = the whole field was flagged as bad
Note (2): Filters are
Med = Medium,
Tck = Thick,
Tn1 = Thin1,
Tn2 = Thin2.
Note (3): Observing modes from table1, as follows:
PFW = (MOS) Prime Full Window: covering full FOV
PPW2 = (MOS) Prime Partial W2: small central window
PPW3 = (MOS) Prime Partial W3: large central window
PPW4 = (MOS) Prime Partial W4: small central window
PPW5 = (MOS) Prime Partial W5: large central window
FU = (MOS) Fast Uncompressed: central CCD in timing mode
RFS = (MOS) Prime Partial RFS: central CCD
with different frame time (Refreshed Frame Store)
PFWE = (PN) Prime Full Window Extended: covering full FOV
PFW = (PN) Prime Full Window: covering full FOV
PLW = (PN) Prime Large Window: half the height of PFW/PFWE
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table1.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 3 A3 --- Inst Instrument (PN or MOS)
6- 9 A4 --- md Observing mode
11- 36 A26 --- Name Designation of the mode
38- 98 A61 --- Comments Description of the mode
--------------------------------------------------------------------------------
Byte-by-byte Description of file: target.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 4 I4 --- Rev Satellite revolution number
(consecutive in time)
6- 15 I010 --- ObsID Observation number
17 A1 -- n_ObsID [*] indicates a note in notes.dat file (1)
19- 21 I3 --- SRC ?=- Source number per observation of the
identified
23- 28 I6 --- DETID ?=- Detection ID of the identified target
30 A1 --- Fld Field classification (2)
32 A1 --- Crd [nps- ] Coordinate preference between proposal
position and Simbad position (3)
34- 36 A3 --- Categ Proposal category as taken from the XSA (4)
38- 42 A5 --- Prog Proposal program as taken from the XSA (5)
44- 53 F10.6 deg RAdeg ? Proposal right ascension
in decimal degrees (J2000) (6)
55- 64 F10.6 deg DEdeg ? Proposal declination
in decimal degrees (J2000) (6)
66- 85 A20 --- Target Proposal target name
87- 96 F10.6 deg RASdeg ?=- Simbad right ascension
in decimal degrees (J2000)
98-107 F10.6 deg DESdeg ?=- Simbad declination
in decimal degrees (J2000)
109-111 A3 --- Type Simbad object type
113-144 A32 --- SName ?=--- Simbad name for the field
146-155 F10.6 deg RAXdeg ? XSA right ascension (J2000) (7)
157-166 F10.6 deg DEXdeg ? XSA declination (J2000) (7)
--------------------------------------------------------------------------------
Note (1): a star indicates if there is a note for this observation or
for this proposal-ID (repeated for the several observations for
this proposal) in notes.dat file.
Note (2): Field classification as follows:
p = point or point-like source
s = small extended (r<3arcmin)
l = large extended (r>3arcmin)
e = extended source of unknown extent
f = field (all detections are potential targets)
x = X-ray shadow experiment and similar, that is, only the spectra
of fore- and background objects are of interest (though the
location of the field should be considered as target)
t = two clearly identified targets (e.g., a double star)
n = there is no target associated with the field
u = unknown target, i.e., the target could not be classified or
is of unknown nature
Note (3): Coordinate preference between (p) proposal position and (s)
Simbad position, depending on which defined the target better; in case
of offset positions (usually indicated in the field name from the
proposal) (n) no preference is given.
Note (4): Proposal category as taken from the XMM Science Archive (XSA)
as follows:
I = Stars, White Dwarfs and Solar System
II = White Dwarf Binaries, Neutron Star Binaries,
Cataclysmic Variables, ULXs and Black Holes
III = Supernovae, Supernova Remnants, Diffuse Emission, and
Isolated Neutron Stars
IV = Galaxies and Galactic Surveys
V = Groups of Galaxies, Clusters of Galaxies, and Superclusters
VI = Active Galactic Nuclei, Quasars, BL Lac Objects, and X-ray Background
VII = X-ray Background and Surveys
Note (5): Proposal program as taken from the XSA as follows:
GO = Guest Observer
Cal = Calibration
ToO = Targets of Opportunity
Cha = Co-Chandra
ESO = Co-ESO
Trig = Triggered
Large = Large
Note (6): The proposal position refers to the position given by the
observer; this position is placed at a specified detector location
which depends on the prime instrument (EPIC or RGS) as indicated by
the observer and which avoids chip gaps, dead spots etc, unless an
offset is indicated by the investigator.
Note (7): The XMM Science Archive (XSA) gives the coordinates of the prime
instrument viewing direction which are corrected for the star tracker
mis-alignment.
--------------------------------------------------------------------------------
Byte-by-byte Description of file: notes.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 10 I010 --- ObsID Observation number
12- 80 A69 --- Note Text of the note
--------------------------------------------------------------------------------
Acknowledgements: Mike Watson, mgw(at)star.le.ac.uk
References:
Watson et al., Paper I 2001A&A...365L..51W 2001A&A...365L..51W
Barcons et al., Paper II 2002A&A...382..522B 2002A&A...382..522B
Carrera et al., Paper III 2007A&A...469...27C 2007A&A...469...27C, Cat. J/A+A/469/27
Barcons et al., Paper IV 2007A&A...476.1191B 2007A&A...476.1191B, Cat. J/A+A/476/1191
History:
23-Dec-2008: on-line data
09-Dec-2010: file target.dat corrected (erroneous minus signs in DESdeg)
(End) Patricia Vannier [CDS] 23-Oct-2008