J/MNRAS/528/1264 eUDS, SRG/eROSITA X-ray Survey of UKIDSS UDS (Krivonos+, 2024)
eUDS: The SRG/eROSITA X-ray Survey of the UKIDSS Ultra Deep Survey Field.
Catalogue of Sources.
Krivonos R., Gilfanov M., Medvedev P., Sazonov S., Sunyaev R.
<Mon. Not. R. Astron. Soc. 528, 1264-1275 (2024)>
=2024MNRAS.528.1264K 2024MNRAS.528.1264K (SIMBAD/NED BibCode)
ADC_Keywords: Surveys ; X-ray sources ; Active gal. nuclei ; Clusters, galaxy ;
QSOs ; Binaries, X-ray
Keywords: catalogues - surveys - X-ray: general
Abstract:
The eROSITA X-ray telescope on board the Spectrum-Roentgen-Gamma (SRG)
spacecraft observed the field of the UKIDSS Ultra-Deep Survey (UDS) in
August-September 2019, during its flight to Sun-Earth L2 point. The
resulting eROSITA UDS (or eUDS) survey was thus the first eROSITA
X-ray imaging survey, which demonstrated the capability of the
telescope to perform uniform observations of large sky areas. With a
moderate single-camera exposure of 150ks, eUDS covered ∼5deg2
with the limiting flux ranging between 4*10-15 and
5*10-14erg/cm2/s in the 0.3-2.3keV band. We present a catalogue
of 647 sources detected at likelihood >10 (∼4sigma) during the eUDS.
The catalogue provides information on the source fluxes in the main
energy band 0.3-2.3keV and forced photometry in a number of bands
between 0.3 and 8keV. Using the deeper 4XMM-DR12 catalogue, we have
identified 22 strongly variable objects that have brightened or faded
by at least a factor of ten during the eROSITA observations compared
to previous observations by XMM-Newton. We also provide a catalogue of
22 sources detected by eROSITA in the hard energy band of 2.3-5keV.
Description:
The catalogue (tablea1.dat, eUDS.fits) contains 647 sources detected
in the 0.3-2.3keV band using eSASS adopting a detection likelihood
threshold of 10. The catalogue provides information on the source
fluxes in the main energy band 0: 0.3-2.3keV and forced photometry in
1: 0.3-0.6, 2: 0.6-2.3, 3: 2.3-5.0 and 4: 5.0-8.0keV bands.
The catalogue of forced PSF-fitting fluxes (tablea1.dat,
eUDS_4XMM-DR12.fits) contains 3603 XMM-Newton sources from 4XMM-DR12
catalogue with the eUDS exposure of more than 100 s. The catalogue
provides information on the source forced photometry in the energy
bands 0: 0.3-2.3, 1: 0.3-0.6, 2: 0.6-2.3, 3: 2.3-5.0 and 4:
5.0-8.0keV. To warn about the potential impact of spatial confusion
with a nearby bright source, we added a confusion flag (see paper for
details).
File Summary:
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FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
tablea1.dat 634 647 eUDS X-ray catalog, converted from eUDS.fits
tablea2.dat 623 3603 eUDS forced photometry of 4XMM-DR12 sources,
converted from eUDS_4XMM-DR12.fits
fits/* . 2 Original catalogs in FITS
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See also:
J/A+A/661/A1 : The eFEDS X-ray catalogs (Brunner+, 2022)
J/A+A/661/A38 : SRG/ART-XC 1st year all-sky X-ray survey (Pavlinsky+, 2022)
https://www.srg.cosmos.ru/eUDS : eUDS catalog
Byte-by-byte Description of file: tablea1.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 3 I3 --- SrcID [1/647] Source ID (ID_SRC)
5- 25 A21 --- Name Source name, eUDS JHHMMSS.s+DDMMSS
27- 36 F10.6 deg RAdeg [33.51/35.56] Right ascension (J2000) (RA)
38- 47 F10.6 deg DEdeg [-5.95/-3.61] Declination (J2000) (DE)
49- 54 F6.3 arcsec ePos Positional uncertainty (RADEC_ERR)
56- 60 F5.2 arcsec Ext Source extent (EXT)
62- 66 F5.2 arcsec e_Ext ? Extent error (EXT_ERR)
68- 77 F10.6 --- ExtLike Extent likelihood (EXT_LIKE)
79- 90 F12.6 --- DetLike Detection likelihood measured by
PSF-fitting; 0.3-2.3keV (DET_LIKE)
92- 99 F8.6 ct/s MLRate Source count rate measured by
PSF-fitting; 0.3-2.3keV (ML_RATE)
101-108 F8.6 ct/s e_MLRate 1 sigma count rate error; 0.3-2.3keV
(MLRATEERR)
110-120 F11.6 ct MLCts Source net counts measured from count
rate; 0.3-2.3keV (ML_CTS)
122-132 F11.6 ct e_MLCts 1 sigma counts error; 0.3-2.3keV
(MLCTSERR)
134-145 E12.6 mW/m2 MLFlux Source flux converted from count
rate; 0.3-2.3keV (ML_FLUX)
147-158 E12.6 mW/m2 e_MLFlux 1 sigma flux error; 0.3-2.3keV
(MLFLUXERR)
160-171 E12.6 s MLExp Vignetted exposure value; 0.3-2.3keV
(ML_EXP)
173-184 F12.6 ct/arcmin2 MLBkg Background at the source
position; 0.3-2.3keV (ML_BKG)
186-206 A21 --- DR12Name 4XMM-DR12 source name used for forced
photometry (DR12IAUNAME)
208-219 F12.6 --- DetLike1 Detection likelihood measured by
PSF-fitting; 0.3-0.6keV (DETLIKE1)
221-228 F8.6 ct/s MLRate1 ? Source count rate measured by
PSF-fitting; 0.3-0.6keV (MLRATE1)
230-237 F8.6 ct/s e_MLRate1 1 sigma count rate error; 0.3-0.6keV
(MLRATEERR_1)
239-249 F11.6 ct MLCts1 ? Source net counts measured from count
rate; 0.3-0.6keV (MLCTS1)
251-261 F11.6 ct e_MLCts1 1 sigma counts error; 0.3-0.6keV
(MLCTSERR_1)
263-274 E12.6 mW/m2 MLFlux1 ? Source flux converted from count
rate; 0.3-0.6keV (MLFLUX1)
276-287 E12.6 mW/m2 e_MLFlux1 1 sigma flux error; 0.3-0.6keV
(MLFLUXERR_1)
289-300 E12.6 s MLExp1 Vignetted exposure value; 0.3-0.6keV
(MLEXP1)
302-313 F12.6 ct/arcmin2 MLBkg1 Background at the source
position; 0.3-0.6keV (MLBKG1)
315-326 F12.6 --- DetLike2 Detection likelihood measured by
PSF-fitting; 0.6-2.3keV (DETLIKE2)
328-335 F8.6 ct/s MLRate2 ? Source count rate measured by
PSF-fitting; 0.6-2.3keV (MLRATE2)
337-344 F8.6 ct/s e_MLRate2 1 sigma count rate error; 0.6-2.3keV
(MLRATEERR_2)
346-356 F11.6 ct MLCts2 ? Source net counts measured from count
rate; 0.6-2.3keV (MLCTS2)
358-368 F11.6 ct e_MLCts2 1 sigma counts error; 0.6-2.3keV
(MLCTSERR_2)
370-381 E12.6 mW/m2 MLFlux2 ? Source flux converted from count
rate; 0.6-2.3keV (MLFLUX2)
383-394 E12.6 mW/m2 e_MLFlux2 1 sigma flux error; 0.6-2.3keV
(MLFLUXERR_2)
396-407 E12.6 s MLExp2 Vignetted exposure value; 0.6-2.3keV
(MLEXP2)
409-420 F12.6 ct/arcmin2 MLBkg2 Background at the source
position; 0.6-2.3keV (MLBKG2)
422-433 F12.6 --- DetLike3 Detection likelihood measured by
PSF-fitting; 2.3-5keV (DETLIKE3)
435-442 F8.6 ct/s MLRate3 ? Source count rate measured by
PSF-fitting; 2.3-5keV (MLRATE3)
444-451 F8.6 ct/s e_MLRate3 1 sigma count rate error; 2.3-5keV
(MLRATEERR_3)
453-463 F11.6 ct MLCts3 ? Source net counts measured from count
rate; 2.3-5keV (MLCTS3)
465-475 F11.6 ct e_MLCts3 1 sigma counts error; 2.3-5keV
(MLCTSERR_3)
477-488 E12.6 mW/m2 MLFlux3 ? Source flux converted from count
rate; 2.3-5keV (MLFLUX3)
490-501 E12.6 mW/m2 e_MLFlux3 1 sigma flux error; 2.3-5keV
(MLFLUXERR_3)
503-514 E12.6 s MLExp3 Vignetted exposure value; 2.3-5keV
(MLEXP3)
516-527 F12.6 ct/arcmin2 MLBkg3 Background at the source
position; 2.3-5keV (MLBKG3)
529-540 F12.6 --- DetLike4 Detection likelihood measured by
PSF-fitting; 5-8keV (DETLIKE4)
542-549 F8.6 ct/s MLRate4 ? Source count rate measured by
PSF-fitting; 5-8keV (MLRATE4)
551-558 F8.6 ct/s e_MLRate4 1 sigma count rate error; 5-8keV
(MLRATEERR_4)
560-570 F11.6 ct MLCts4 ? Source net counts measured from count
rate; 5-8keV (MLCTS4)
572-582 F11.6 ct e_MLCts4 ? 1 sigma counts error; 5-8keV
(MLCTSERR_4)
584-595 E12.6 mW/m2 MLFlux4 ? Source flux converted from count
rate; 5-8keV (MLFLUX4)
597-608 E12.6 mW/m2 e_MLFlux4 1 sigma flux error; 5-8keV (MLFLUXERR_4)
610-621 E12.6 s MLExp4 Vignetted exposure value; 5-8keV
(MLEXP4)
623-634 F12.6 ct/arcmin2 MLBkg4 Background at the source
position; 5-8keV (MLBKG4)
--------------------------------------------------------------------------------
Byte-by-byte Description of file: tablea2.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 21 A21 --- DR12Name 4XMM-DR12 source IAU name (DR12IAUNAME)
23- 37 I15 --- DR12SrcID 4XMM-DR12 source ID number
(64-bit integer) (DR12IAUNAME)
39- 48 F10.6 deg RAdeg [33.39/35.74] Right ascension
(J2000) (DR12_RA)
50- 59 F10.6 deg DEdeg [-5.99/-3.54] Declination
(J2000) (DR12_DEC)
61- 66 F6.3 arcsec ePos Positional error (DR12RADECERR)
68- 79 F12.6 --- DetLike0 Detection likelihood; 0.3-2.3keV
(DETLIKE0)
81- 92 F12.6 --- DetLike1 Detection likelihood; 0.3-0.6keV
(DETLIKE1)
94-105 F12.6 --- DetLike2 Detection likelihood; 0.6-2.3keV
(DETLIKE2)
107-118 F12.6 --- DetLike3 Detection likelihood; 2.3-5keV
(DETLIKE3)
120-131 F12.6 --- DetLike4 Detection likelihood; 5-8keV (DETLIKE4)
133-142 F10.6 ct/s MLRate0 ? Source count rate measured by
PSF-fitting; 0.3-2.3keV (MLRATE0)
144-153 F10.6 ct/s MLRate1 ? Source count rate measured by
PSF-fitting; 0.3-0.6keV (MLRATE1)
155-164 F10.6 ct/s MLRate2 ? Source count rate measured by
PSF-fitting; 0.6-2.3keV (MLRATE2)
166-175 F10.6 ct/s MLRate3 ? Source count rate measured by
PSF-fitting; 2.3-5keV (MLRATE3)
177-186 F10.6 ct/s MLRate4 ? Source count rate measured by
PSF-fitting; 5-8keV (MLRATE4)
188-197 F10.6 ct/s e_MLRate0 1 sigma count rate error; 0.3-2.3keV
(MLRATEERR_0)
199-208 F10.6 ct/s e_MLRate1 1 sigma count rate error; 0.3-0.6keV
(MLRATEERR_1)
210-219 F10.6 ct/s e_MLRate2 1 sigma count rate error; 0.6-2.3keV
(MLRATEERR_2)
221-230 F10.6 ct/s e_MLRate3 1 sigma count rate error; 2.3-5keV
(MLRATEERR_3)
232-241 F10.6 ct/s e_MLRate4 ? 1 sigma count rate error; 5-8keV
(MLRATEERR_4)
243-253 F11.6 ct MLCts0 ? Source net counts measured from
count rate; 0.3-2.3keV (MLCTS0)
255-265 F11.6 ct MLCts1 ? Source net counts measured from
count rate; 0.3-0.6keV (MLCTS1)
267-277 F11.6 ct MLCts2 ? Source net counts measured from
count rate; 0.6-2.3keV (MLCTS2)
279-289 F11.6 ct MLCts3 ? Source net counts measured from
count rate; 2.3-5keV (MLCTS3)
291-301 F11.6 ct MLCts4 ? Source net counts measured from
count rate; 5-8keV (MLCTS4)
303-314 F12.6 ct e_MLCts0 1 sigma counts error; 0.3-2.3keV
(MLCTSERR_0)
316-327 F12.6 ct e_MLCts1 1 sigma counts error; 0.3-0.6keV
(MLCTSERR_1)
329-340 F12.6 ct e_MLCts2 1 sigma counts error; 0.6-2.3keV
(MLCTSERR_2)
342-353 F12.6 ct e_MLCts3 1 sigma counts error; 2.3-5keV
(MLCTSERR_3)
355-366 F12.6 ct e_MLCts4 ? 1 sigma counts error; 5-8keV
(MLCTSERR_4)
368-379 E12.6 mW/m2 MLFlux0 ? Source flux converted from
count rate; 0.3-2.3keV (MLFLUX0)
381-392 E12.6 mW/m2 MLFlux1 ? Source flux converted from
count rate; 0.3-0.6keV (MLFLUX1)
394-405 E12.6 mW/m2 MLFlux2 ? Source flux converted from
count rate; 0.6-2.3keV (MLFLUX2)
407-418 E12.6 mW/m2 MLFlux3 ? Source flux converted from
count rate; 2.3-5keV (MLFLUX3)
420-431 E12.6 mW/m2 MLFlux4 ? Source flux converted from
count rate; 5-8keV (MLFLUX4)
433-444 E12.6 mW/m2 e_MLFlux0 1 sigma flux error; 0.3-2.3keV
(MLFLUXERR_0)
446-457 E12.6 mW/m2 e_MLFlux1 1 sigma flux error; 0.3-0.6keV
(MLFLUXERR_1)
459-470 E12.6 mW/m2 e_MLFlux2 1 sigma flux error; 0.6-2.3keV
(MLFLUXERR_2)
472-483 E12.6 mW/m2 e_MLFlux3 1 sigma flux error; 2.3-5keV
(MLFLUXERR_3)
485-496 E12.6 mW/m2 e_MLFlux4 ? 1 sigma flux error; 5-8keV
(MLFLUXERR_4)
498-508 E11.6 s MLExp0 Vignetted exposure value; 0.3-2.3keV
(MLEXP0)
510-520 E11.6 s MLExp1 Vignetted exposure value; 0.3-0.6keV
(MLEXP1)
522-532 E11.6 s MLExp2 Vignetted exposure value; 0.6-2.3keV
(MLEXP2)
534-544 E11.6 s MLExp3 Vignetted exposure value; 2.3-5keV
(MLEXP3)
546-556 E11.6 s MLExp4 Vignetted exposure value; 5-8keV
(MLEXP4)
558-569 F12.6 ct/arcmin2 MLBkg0 Background at the source
position; 0.3-2.3keV (MLBKG0)
571-582 F12.6 ct/arcmin2 MLBkg1 Background at the source
position; 0.3-0.6keV (MLBKG1)
584-595 F12.6 ct/arcmin2 MLBkg2 Background at the source
position; 0.6-2.3keV (MLBKG2)
597-608 F12.6 ct/arcmin2 MLBkg3 Background at the source
position; 2.3-5keV (MLBKG3)
610-621 F12.6 ct/arcmin2 MLBkg4 Background at the source
position; 5-8keV (MLBKG4)
623 I1 --- Conf 1 if source is located within 60 arcsec
from another source with 0.3-2.3keV
flux > 1E-14 erg/s/cm**2 (CONF)
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History:
From Roman Krivonos, krivonos(at)cosmos.ru
Acknowledgements:
This work is based on observations with eROSITA telescope onboard SRG
observatory. The SRG observatory was built by Roskosmos in the
interests of the Russian Academy of Sciences represented by its Space
Research Institute (IKI) in the framework of the Russian Federal Space
Program, with the participation of the Deutsches Zentrum fuer Luft-und
Raumfahrt (DLR). The SRG/eROSITA X-ray telescope was built by a
consortium of German Institutes led by MPE, and supported by DLR. The
SRG spacecraft was designed, built, launched, and is operated by the
Lavochkin Association and its subcontractors. The science data are
downlinked via the Deep Space Network Antennae in Bear Lakes,
Ussurijsk, and Baykonur, funded by Roskosmos. The eROSITA data used in
this work were processed using the eSASS software system developed by
the German eROSITA consortium and proprietary data reduction and
analysis software developed by the Russian eROSITA Consortium. This
research has made use of data obtained from the 4XMM serendipitous
source catalogue compiled by the XMM-Newton Survey Science Centre
consortium.
(End) Patricia Vannier [CDS] 01-Feb-2024