J/A+A/480/611 XMM-Newton Slew Survey catalogue, XMMSL1 (Saxton+, 2008)
The first XMM-Newton Slew Survey catalogue: XMMSL1.
Saxton R.D., Read A.M., Esquej P., Freyberg M.J., Altieri B., Bermejo D.
<Astron. Astrophys., 480, 611-622 (2008)>
=2008A&A...480..611S 2008A&A...480..611S
ADC_Keywords: Surveys ; X-ray sources
Mission_Name: XMM
Keywords: X-rays: general - surveys - catalogs
Abstract:
We report on the production of a large area, shallow, sky survey, from
XMM-Newton slews. The great collecting area of the mirrors coupled
with the high quantum efficiency of the EPIC detectors have made
XMM-Newton the most sensitive X-ray observatory flown to date. We use
data taken with the EPIC-pn camera during slewing manoeuvres to
perform an X-ray survey of the sky.
Data from 218 slews have been subdivided into small images and source
searched. This has been done in three distinct energy bands; a soft
(0.2-2keV) band, a hard (2-12keV) band and a total XMM-Newton band
(0.2-12keV). Detected sources, have been quality controlled to remove
artifacts and a catalogue has been drawn from the remaining sources.
A "full" catalogue, containing 4710 detections and a "clean"
catalogue containing 2692 sources have been produced, from 14% of the
sky. In the hard X-ray band (2-12keV) 257 sources are detected in the
clean catalogue to a flux limit of 4x10-12erg/s/cm2. The flux
limit for the soft (0.2-2keV) band is 6x10-13erg/s/cm2 and for the
total (0.2-12keV) band is 1.2x10-12erg/s/cm2. The source
positions are shown to have an uncertainty of 8" (1σ
confidence).
Description:
XMMSL1 is the first catalogue of X-ray sources found in slew data
taken from the European Space Agency's (ESA) XMM-Newton observatory,
and has been constructed by members of the XMM SOC and the EPIC
consortium on behalf of ESA.
This version (V1.1) contains the original XMMSL1 catalogue, released
in May 2006, with the addition of sources from a further 109 slews
taken between revolutions 1144 and 1309. It also contains a
reprocessing of the slew 9075100005, which was removed from the
original catalogue due to an attitude reconstruction problem. This
release is known as XMMSL1_Delta1.
XMMSL1_Delta1 has been generated from 327 slews, executed between
revolutions 314 and 1309. Not all slews made in this period have been
used; slews with particularly high background or which gave processing
problems have been rejected. A description of slew selection and
initial processing is given. The slews have been processed separately
in three energy bands
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
xmmsl1c.dat 1244 4326 XMMSL1 catalogue, clean catalog (V1.1, 07/04/08)
xmmsl1t.dat 1244 8662 XMMSL1 catalogue, total catalog (V1.1, 07/04/08)
fits/* . 3 Catalogues in fits version and original readme
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See also:
IX/39 : The XMM-Newton 2nd Serendipitous Source Catalogue (2XMM) (2007)
B/xmm : XMM-Newton Observation Log (XMM-Newton Science Operation Center)
http://xmm.esac.esa.int/external/xmm_data_acc/xsa : XMMSL1 Home Page
Byte-by-byte Description of file: xmmsl1[tc].dat
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Bytes Format Units Label Explanations
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1- 6 A6 --- --- [XMMSL1]
8- 23 A16 --- XMMSL1 Name of the source (JHHMMSS.s+DDMMSS)
25- 34 A10 --- ObsID Observation identification number
36- 38 I3 --- SN [1,139] Unique identification number
for each detection in an observation
40- 47 F8.4 deg RAdeg Right ascension in decimal degrees (J2000)
49- 56 F8.4 deg DEdeg Declination in decimal degrees (J2000)
58- 65 F8.4 arcsec e_pos rms uncertainty on position
67- 74 F8.4 deg GLON Galactic longitude
76- 83 F8.4 deg GLAT Galactic latitude
85- 90 F6.3 --- HR1 ?=- Hardness ratio HR1=(H-S)/(H+S)
92- 97 F6.3 --- e_HR1 ?=- rms uncertainty on HR1
99-117 A19 "date" Date.1 Observation date start (YYYY-MM-DDThh:mm:ss)
119-137 A19 "date" Date.2 Observation date, end (YYYY-MM-DDThh:mm:ss)
139-150 E12.6 ct SCTST ?=- Number of background subtracted
counts, in the total energy band
(0.2-12keV) (1)
152-163 E12.6 ct e_SCTST ?=- rms uncertainty on SCTST
165-176 E12.6 ct SCTSH ?=- Number of background subtracted counts
in the hard energy band (2-12keV) (1)
178-189 E12.6 ct e_SCTSH ?=- rms uncertainty on SCTSH
191-202 E12.6 ct SCTSS ?=- Number of background subtracted counts
in the soft energy band (0.2-2keV) (1)
204-215 E12.6 ct e_SCTSS ?=- rms uncertainty on SCTSS
217-223 F7.2 pix XposT ?=- X position on total band image (2)
225-231 F7.2 pix YposT ?=- Y position on total band image (2)
233-239 F7.2 pix XposH ?=- X position on hard band image (2)
241-247 F7.2 pix YposH ?=- Y position on hard band image (2)
249-255 F7.2 pix XposS ?=- X position on soft band image (2)
257-263 F7.2 pix YposS ?=- Y position on soft band image (2)
265-276 E12.6 pix ExtT ?=- Spatial extension of the source in
the total energy band
278-289 E12.6 pix e_ExtT ?=- rms uncertainty on ExtT
291-302 E12.6 pix ExtH ?=- Spatial extension of the source in
the hard energy band
304-315 E12.6 pix e_ExtH ?=- rms uncertainty on ExtH
317-328 E12.6 pix ExtS ?=- Spatial extension of the source in
the soft energy band
330-341 E12.6 pix e_ExtS ?=- rms uncertainty on ExtS
343-354 E12.6 --- DetMLT ?=- Detection likelihood in the total band
356-367 E12.6 --- DetMLH ?=- Detection likelihood in the hard band
369-380 E12.6 --- DetMLS ?=- Detection likelihood in the soft band
382-393 E12.6 --- ExtMLT ?=- Likelihood of the source being
extended in the total band
395-406 E12.6 --- ExtMLH ?=- Likelihood of the source being
extended in the hard band
408-419 E12.6 --- ExTMLS ?=- Likelihood of the source being
extended in the soft band
421-432 E12.6 ct/pix bgMapT ?=- Total band background value
434-445 E12.6 ct/pix bgMapH ?=- Hard band background value
447-458 E12.6 ct/pix bgMapS ?=- Soft band background value
460-471 E12.6 s ExpMapT ?=- Total band effective on-axis expo.time
473-484 E12.6 s ExpMapH ?=- Hard band effective on-axis expo.time
486-497 E12.6 s ExpMapS ?=- Soft band effective on-axis expo.time
499-510 E12.6 fW/m2 FluxT ?=- Total band source flux
512-523 E12.6 fW/m2 e_FluxT ?=- rms uncertainty on FluxT
525-536 E12.6 fW/m2 FluxH ?=- Hard band source flux
538-549 E12.6 fW/m2 e_FluxH ?=- rms uncertainty on FluxH
551-562 E12.6 fW/m2 FluxS ?=- Soft band source flux
564-575 E12.6 fW/m2 e_FluxS ?=- rms uncertainty on FluxS
577-588 E12.6 ct/s RateT ?=- Total band count rate
590-601 E12.6 ct/s e_RateT ?=- rms uncertainty on RateT
603-614 E12.6 ct/s RateH ?=- Hard band count rate
616-627 E12.6 ct/s e_RateH ?=- rms uncertainty on RateH
629-640 E12.6 ct/s RateS ?=- Soft band count rate
642-653 E12.6 ct/s e_RateS ?=- rms uncertainty on RateS
655-662 F8.4 deg RAdegT ?=- Total band right ascension (J2000)
664-671 F8.4 deg DEdegT ?=- Total band declination (J2000)
673-680 F8.4 deg e_posT ?=- Total band positional error
682-689 F8.4 deg GLONT ?=- Total band galactic longitude
691-698 F8.4 deg GLATT ?=- Total band galactic latitude
700-707 F8.4 deg RAdegH ?=- Hard band right ascension (J2000)
709-716 F8.4 deg DEdegH ?=- Hard band declination (J2000)
718-725 F8.4 deg e_posH ?=- Hard band positional error
727-734 F8.4 deg GLONH ?=- Hard band galactic longitude
736-743 F8.4 deg GLATH ?=- Hard band galactic latitude
745-752 F8.4 deg RAdegS ?=- Soft band right ascension (J2000)
754-761 F8.4 deg DEdegS ?=- Soft band declination (J2000)
763-770 F8.4 deg e_posS ?=- Soft band positional error
772-779 F8.4 deg GLONS ?=- Soft band galactic longitude
781-788 F8.4 deg GLATS ?=- Soft band galactic latitude
790-801 A12 --- VarFlag [CLEAN_SAMPLE XXXXXXXXXXXX]
803-839 A37 --- SRCNameT Source name defined in total band list (3)
841-877 A37 --- SRCNameH Source name defined in hard band list (3)
879-915 A37 --- SRCNameS Source name defined in soft band list (3)
917-956 A40 --- XImNameT Name of the image containing the total
band detection
958-997 A40 --- XImNameH Name of the image containing the hard
band detection
999-1038 A40 --- XImNameS Name of the image containing the soft
band detection
1040 A1 --- VerINEXT [TF] Detection flag (4)
1042 A1 --- VerHALO [TF] Detection flag (4)
1044 A1 --- VerHIBGND [TF] Detection flag (4)
1046 A1 --- VerNREDG [TF] Detection flag (4)
1048 A1 --- VerPSUSP [TF] Detection flag (4)
1050 A1 --- VerFALSE [TF] Detection flag (4)
1052-1091 A40 --- Comment Comment which explains why a particular
source flag has been set to true
1093-1123 A31 --- Name Cross-correlations of the positions of
the slew sources with astronomical
databases and catalogues (best match)
1125-1154 A30 --- OName Alternative name for the best match source
1156-1176 A21 --- RASS Name of the closest Rosat All Sky Survey
(RASS) source (5)
1178-1191 A14 --- Type Source type (6)
1193-1201 A9 --- r_Name Source of best match selection (7)
1203-1214 E12.6 arcmin Dist ? Distance between the best match
candidate and the slew survey source
1216-1227 E12.6 arcsec DistRASS ?=- Distance from the best match ROSAT
source and the slew source
1229-1231 A3 --- ModeID Observing mode of EPIC-pn camera (8)
1233-1244 E12.7 ct/s bgRate Peak background count rate in the image
from which the source was extracted (9)
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Note (1): corrected for the PSF.
Note (2): Units: 4.1"x4.1" pixels
Note (3): The format is 'xs' followed by the revolution number, the observation
ID and the source position, e.g. xs0841908410000212:57:07.5+01:50:42
Note (4): Detection flags signification as:
VerINEXT: If set true, this flag notes that a detection has been
found within an extended source and is probably false.
This flag is used to ensure that only one source is quoted
for the large supernova remnants.
VerHALO: If set true, this flag indicates that a detection lies
within the point spread function, or halo, of a very
bright source and is probably spurious.
VerHIBGND: If set true, this flag indicates that the source lies
within a bright region, caused by high background, and
is probably spurious.
VerNREDG: If set true, this flag indicates that the source has been
detected in two consecutive images of the same slew. This
can occur if the source lies on the border between slews
and implies that the position of the source is unlikely to
be accurate.
VerPSUSP: This flag indicates that the quoted position of the source
is likely to be inaccurate. In a few slews the attitude
reconstruction is poor and in these cases the actual
position of the source is difficult to determine and can
be wrong by an arcminute.
VerFALSE: This is a catch-all for problems not included in the other
flags. In the catalogue 29 sources have this flag set
true, in two cases it is because the exposure time has
been calculated as zero and in the other cases the
detections are due to reflection from a close, but out of
the field-of-view SCO X-1.
Note (5): RASS name, 1RXS JHHMMSS.s+DDMMSS or JHHMMSS.s+DDMMSS
Note (6): Source type as returned by SIMBAD, NED and the other resources
used in the cross-matching process. This is directly taken from the
catalogue in question and no attempt has been made to rationalise the
values.
Note (7): The astronomical database or catalogue from which the best match
has been selected. e.g. SIMBAD, NED, etc.
Note (8): Observing mode of the EPIC-pn camera ad follows:
FF = Full frame mode
eFF = extended full frame mode
LW = large window mode
Note (9): Peak background count rate in the image from which the source was
extracted. This is measured as the count rate, over the whole image,
for events with energy >10keV (PI>10000). It is quoted to a resolution
of 0.1ct/s and is used to determine the overall background environment
in which a source was detected. This value is used in the creation of
a clean subsample of the catalogue (see top level description).
Generally, the higher this value, the greater the probability that the
source is spurious. This is especially true if the detection
likelihood of the source is less than 14. The value has been tabulated
for images with a background rate greater than 2ct/s. For quieter
images the value has been artifically set to 1.9ct/s.
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History:
Copied at http://xmm.esac.esa.int/external/xmm_data_acc/xsa/
(End) Patricia Vannier [CDS] 07-Apr-2008