J/MNRAS/436/3581 X-ray observations of Stripe 82 (LaMassa+, 2013)
Finding rare AGN: XMM-Newton and Chandra observations of SDSS Stripe 82.
LaMassa S.M., Urry C.M., Cappelluti N., Civano F., Ranalli P., Glikman E.,
Treister E., Richards G., Ballantyne D., Stern D., Comastri A.,
Cardamone C., Schawinski K., Bohringer H., Chon G., Murray S.S., Green P.,
Nandra K.
<Mon. Not. R. Astron. Soc., 436, 3581-3601 (2013)>
=2013MNRAS.436.3581L 2013MNRAS.436.3581L
ADC_Keywords: Active gal. nuclei ; X-ray sources
Keywords: catalogues; surveys; galaxies: active; quasars: general
quasars: supermassive black holes; X-rays: galaxies
Abstract:
We have analysed the XMM-Newton and Chandra data overlapping ∼16.5deg2
of Sloan Digital Sky Survey Stripe 82, including ∼4.6deg2 of
proprietary XMM-Newton data that we present here. In total, 3362
unique X-ray sources are detected at high significance. We derive the
XMM-Newton number counts and compare them with our previously reported
Chandra logN-logS relations and other X-ray surveys.
The Stripe 82 X-ray source lists have been matched to multiwavelength
catalogues using a maximum likelihood estimator algorithm. We
discovered the highest redshift (z=5.86) quasar yet identified in an
X-ray survey. We find 2.5 times more high-luminosity (LX>10^45erg/s)
AGN than the smaller area Chandra and XMM-Newton survey of COSMOS and
1.3 times as many identified by XBootes. Comparing the high-luminosity
active galactic nuclei (AGN) we have identified with those predicted
by population synthesis models, our results suggest that this AGN
population is a more important component of cosmic black hole growth
than previously appreciated. Approximately a third of the X-ray
sources not detected in the optical are identified in the infrared,
making them candidates for the elusive population of obscured
high-luminosity AGN in the early universe.
Description:
XMM-Newton and Chandra X-ray sources matched to the SDSS, WISE,
UKIDSS, and GALEX catalogs using the maximum likelihood estimator
(MLE). X-ray sources are matched to FIRST sources using a nearest
neighbor matching.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
xmms82.dat 749 2358 XMM matched catalog
chands82.dat 769 1146 Chandra matched catalog
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See also:
B/chandra : The Chandra Archive Log (CXC, 1999-2014)
IX/41 : XMM-Newton Serendipitous Source Catalogue 2XMMi-DR3 (XMM-SSC, 2010)
V/139 : The SDSS Photometric Catalog, Release 9 (Adelman-McCarthy+, 2012)
II/314 : UKIDSS-DR8 LAS, GCS and DXS Surveys (Lawrence+ 2012)
II/319 : UKIDSS-DR9 LAS, GCS and DXS Surveys (Lawrence+ 2012)
II/312 : GALEX-DR5 (GR5) sources from AIS and MIS (Bianchi+ 2011)
II/311 : WISE All-Sky Data Release (Cutri+ 2012)
II/328 : AllWISE Data Release (Cutri+ 2013)
VIII/90 : The FIRST Survey Catalog, Version 12Feb16 (Becker+ 2012)
J/A+A/525/A37 : SDSS Stripe 82 variability indexes of QSOs (Meusinger+ 2011)
J/MNRAS/413/3059 : 4098 galaxy clusters in SDSS Stripe 82 (Geach+, 2011)
Byte-by-byte Description of file: xmms82.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 4 I4 --- Seq Record number assigned to each XMM source
6- 15 I010 --- Obsno XMM observation identification number
17- 23 F7.3 deg RAdeg XMM right ascension (J2000)
25- 30 F6.3 deg DEdeg XMM declination (J2000)
32- 34 F3.1 arcsec ePos XMM positional error
36- 40 F5.1 arcsec rNN Distance to nearest XMM source
42- 47 F6.2 [mW/m2] logFS ?=0 Soft (0.5-2keV) flux (1)
49- 54 F6.2 [mW/m2] elogFS ?=0 Error on the soft flux (1)
56- 61 F6.2 [mW/m2] logFH ?=0 Hard (2-10keV) flux (1)
63- 68 F6.2 [mW/m2] elogFH ?=0 Error on the hard flux (1)
70- 75 F6.2 [mW/m2] logFF ?=0 Full (0.5-10keV) flux (1)
77- 82 F6.2 [mW/m2] elogFF ?=0 Error on the full flux (1)
84- 90 F7.2 [10-7W] logLS ?=-999 Soft (0.5-2keV) X-ray luminosity
92- 98 F7.2 [10-7W] logLH ?=-999 Hard (2-10keV) X-ray luminosity
100-106 F7.2 [10-7W] logLF ?=-999 Full (0.5-10keV) X-ray luminosity
108-110 A3 --- InCh [yes no] 'yes' if source in Chandra catalog
112-114 A3 --- RemL [yes no] 'yes' if removed from LogN-LogS
calculation
116-118 A3 --- RejS [yes no] 'yes' if SDSS counterpart failed
photometry quality control checks
120-138 I19 --- SDSS ? SDSS ObjID
140-147 F8.3 deg RASdeg ?=-999.00 SDSS right ascension (J2000)
149-156 F8.3 deg DESdeg ?=-999.00 SDSS declination (J2000)
158-162 F5.3 --- RelS ?=-999.00 MLE reliability of SDSS match to
X-ray source
164-170 F7.2 arcsec rS ?=-999.00 Distance between X-ray and SDSS
sources
172-178 F7.2 mag umag ?=-999.00 SDSS u magnitude
180-186 F7.2 mag e_umag ?=-999.00 SDSS u magnitude error
188-194 F7.2 mag gmag ?=-999.00 SDSS g magnitude
196-202 F7.2 mag e_gmag ?=-999.00 SDSS g magnitude error
204-210 F7.2 mag rmag ?=-999.00 SDSS r magnitude
212-218 F7.2 mag e_rmag ?=-999.00 SDSS r magnitude error
220-226 F7.2 mag imag ?=-999.00 SDSS i magnitude
228-234 F7.2 mag e_imag ?=-999.00 SDSS i magnitude error
236-242 F7.2 mag zmag ?=-999.00 SDSS z magnitude
244-250 F7.2 mag e_zmag ?=-999.00 SDSS z magnitude error
252-270 I19 --- SpecID ? SDSS SpecObjID
272-277 A6 --- Class Spectroscopic class: STAR, GALAXY, or QSO
279-286 F8.3 --- zsp ?=-999 Spectroscopic redshift
288-291 I4 --- r_zsp ?=-999 Spectrosocpic redshift source (G2)
293-311 A19 --- WISE WISE Name (JHHMMSS.ss+DDMMSS.s)
313-319 F7.2 deg RAWdeg ?=-999.00 WISE right ascension (J2000)
321-327 F7.2 deg DEWdeg ?=-999.00 WISE declination (J2000)
329-335 F7.2 arcsec e_RAWdeg ?=-999.00 WISE right ascension error
337-343 F7.2 arcsec e_DEWdeg ?=-999.00 WISE Dec error
345-353 F9.4 --- RelW ?=-999.00 MLE reliability of WISE match to
X-ray source
355-361 F7.2 arcsec rW ?=-999.00 Distance between X-ray and WISE
sources
363-369 F7.2 mag W1 ?=-999.00 WISE W1 magnitude (G3)
371-377 F7.2 mag e_W1 ?=-999.00 WISE W1 error
379-385 F7.2 --- W1SNR ?=-999.00 WISE W1 SNR (G4)
387-393 F7.2 mag W2 ?=-999.00 WISE W2 magnitude (G3)
395-401 F7.2 mag e_W2 ?=-999.00 WISE W2 error
403-409 F7.2 --- W2SNR ?=-999.00 WISE W2 SNR (G4)
411-417 F7.2 mag W3 ?=-999.00 WISE W3 magnitude (G3)
419-425 F7.2 mag e_W3 ?=-999.00 WISE W3 error
427-433 F7.2 --- W3SNR ?=-999.00 WISE W3 SNR (G4)
435-441 F7.2 mag W4 ?=-999.00 WISE W4 magnitude (G3)
443-449 F7.2 mag e_W4 ?=-999.00 WISE W4 error
451-457 F7.2 --- W4SNR ?=-999.00 WISE W4 SNR (G4)
459-461 A3 --- ExtW [yes no] 'yes' if extended WISE source
463-465 A3 --- RejW [yes no] 'yes' if WISE counterpart failed
photometry quality control checks
467-478 I12 --- UKIDSS ? UKIDSS ID
480-486 F7.2 deg RAUdeg ?=-999.00 UKIDSS right ascension (J2000)
488-494 F7.2 deg DEUdeg ?=-999.00 UKIDSS declination (J2000)
496-503 F8.3 --- RelU ?=-999.00 MLE reliability of UKIDSS match
to X-ray source
505-511 F7.2 arcsec rU ?=-999.00 Distance between X-ray and UKIDSS
sources
513-519 F7.2 mag Ymag ?=-999.00 UKIDSS Y magnitude
521-527 F7.2 mag e_Ymag ?=-999.00 UKIDSS Y magnitude error
529-535 F7.2 mag Hmag ?=-999.00 UKIDSS H magnitude
537-543 F7.2 mag e_Hmag ?=-999.00 UKIDSS H magnitude error
545-551 F7.2 mag Jmag ?=-999.00 UKIDSS J magnitude
553-559 F7.2 mag e_Jmag ?=-999.00 UKIDSS J magnitude error
561-567 F7.2 mag Kmag ?=-999.00 UKIDSS K magnitude
569-575 F7.2 mag e_Kmag ?=-999.00 UKIDSS K magnitude error
577-579 A3 --- RejU [yes no] 'yes' if UKIDSS counterpart failed
photometry quality control checks
587-605 I19 --- GALEX ? GALEX ObjID
607-613 F7.2 deg RAGdeg ?=-999.00 GALEX right ascension (J2000)
615-621 F7.2 deg DEGdeg ?=-999.00 GALEX declination (J2000)
623-629 F7.2 arcsec ePosN ?=-999.00 GALEX NUV positional error
631-637 F7.2 arcsec ePosF ?=-999.00 GALEX FUV positional error
639-645 F7.2 --- RelG ?=-999.00 MLE reliability of GALEX match to
X-ray source
647-653 F7.2 arcsec rG ?=-999.00 Distance between X-ray and GALEX
sources
655-661 F7.2 mag NUV ?=-999.00 GALEX NUV magnitude
663-669 F7.2 mag e_NUV ?=-999.00 GALEX NUV magnitude error
671-677 F7.2 mag FUV ?=-999.00 GALEX FUV magnitude
679-685 F7.2 mag e_FUV ?=-999.00 GALEX FUV magnitude error
688-692 A5 --- --- [FIRST]
694-709 A16 --- FIRST IAU name of FIRST counterpart
(JHHMMSS.s+DDMMSS)
711-717 F7.2 deg RAFdeg ?=-999.00 FIRST right ascension (J2000)
719-725 F7.2 deg DEFdeg ?=-999.00 FIRST declination (J2000)
727-733 F7.2 arcsec rF ?=-999.00 Distance between X-ray and FIRST
sources
735-741 F7.2 mJy FF ?=-999.00 FIRST 1.4GHz flux density
743-749 F7.2 mJy e_FF ?=-999.00 FIRST 1.4GHZ flux density error
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Note (1): Set to 0 if not significant at the 4.5σ level in that band.
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Byte-by-byte Description of file: chands82.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 6 I6 --- MSID Chandra Source Catalog identification number
8- 17 I10 --- ObsID Chandra observation identification number
19- 25 F7.3 deg RAdeg Chandra right ascension (J2000)
27- 32 F6.3 deg DEdeg Chandra declination (J2000)
34- 37 F4.1 arcsec ePos Chandra positional error
39- 44 F6.1 arcsec rNN Distance to nearest Chandra source
46- 51 F6.2 [mW/m2] logFS ?=0 Soft (0.5-2keV) flux (1)
53- 58 F6.2 [mW/m2] B_logFS ?=0 Higher bound on the soft flux
60- 65 F6.2 [mW/m2] b_logFS ?=0 Lower bound on the soft flux
67- 72 F6.2 [mW/m2] logFH ?=0 Hard (2-10keV) flux (1)
74- 79 F6.2 [mW/m2] B_logFH ?=0 Higher bound on the hard flux
81- 86 F6.2 [mW/m2] b_logFH ?=0 Lower bound on the hard flux
88- 93 F6.2 [mW/m2] logFF ?=0 Full (0.5-10keV) flux (1)
95-100 F6.2 [mW/m2] B_logFF ?=0 Higher bound on the full flux
102-107 F6.2 [mW/m2] b_logFF ?=0 Lower bound on the full flux
109-115 F7.2 [10-7W] logLS ?=-999 Soft (0.5-2keV) X-ray luminosity
117-123 F7.2 [10-7W] logLH ?=-999 Hard (2-10keV) X-ray luminosity
125-131 F7.2 [10-7W] logLF ?=-999 Full (0.5-10keV) X-ray luminosity
133-135 A3 --- InXMM [yes no] 'yes' if source in XMM catalog
137-139 A3 --- RemL [yes no] 'yes' if removed from LogN-LogS
calculation
141-143 A3 --- RejS [yes no] 'yes' if SDSS counterpart failed
photometry quality control checks
145-163 I19 --- SDSS ? SDSS ObjID
165-172 F8.3 deg RASdeg SDSS right ascension (J2000)
174-181 F8.3 deg DESdeg SDSS declination (J2000)
183-187 F5.3 --- RelS MLE reliability of SDSS match to X-ray
source
189-195 F7.2 arcsec rS ?=-999.00 Distance between X-ray and SDSS
source
197-203 F7.2 mag umag ?=-999.00 SDSS u magnitude
205-211 F7.2 mag e_umag ?=-999.00 SDSS u magnitude error
213-219 F7.2 mag gmag ?=-999.00 SDSS g magnitude
221-227 F7.2 mag e_gmag ?=-999.00 SDSS g magnitude error
229-235 F7.2 mag rmag ?=-999.00 SDSS r magnitude
237-243 F7.2 mag e_rmag ?=-999.00 SDSS r magnitude error
245-251 F7.2 mag imag ?=-999.00 SDSS i magnitude
253-259 F7.2 mag e_imag ?=-999.00 SDSS i magnitude error
261-267 F7.2 mag zmag ?=-999.00 SDSS z magnitude
269-275 F7.2 mag e_zmag ?=-999.00 SDSS z magnitude error
277-295 I19 --- SpecID ? SDSS SpecObjID
297-302 A6 --- Class Spectroscopic class (STAR, GALAXY, QSO,
AGN or NELG=Narrow Emission-Line Galaxy)
304-311 F8.3 --- zsp ?=-999 Spectroscopic redshift
313-316 I4 --- r_zsp ?=-999 Spectrosocpic redshift source (G2)
318-336 A19 --- WISE WISE Name (JHHMMSS.ss+DDMMSS.s)
338-344 F7.2 deg RAWdeg ?=-999.00 WISE right ascension (J2000)
346-352 F7.2 deg DEWdeg ?=-999.00 WISE declination (J2000)
354-360 F7.2 arcsec e_RAWdeg ?=-999.00 WISE right ascension error
362-368 F7.2 arcsec e_DEWdeg ?=-999.00 WISE declination error
370-378 F9.4 --- RelW ?=-999.00 MLE reliability of WISE match to
X-ray source
380-386 F7.2 arcsec rW ?=-999.00 Distance between X-ray and WISE
sources
388-394 F7.2 mag W1 ?=-999.00 WISE W1 magnitude (G3)
396-402 F7.2 mag e_W1 ?=-999.00 WISE W1 error
404-410 F7.2 --- W1SNR ?=-999.00 WISE W1 SNR (G4)
412-418 F7.2 mag W2 ?=-999.00 WISE W2 magnitude (G3)
420-426 F7.2 mag e_W2 ?=-999.00 WISE W2 error
428-434 F7.2 --- W2SNR ?=-999.00 WISE W2 SNR (G4)
436-442 F7.2 mag W3 ?=-999.00 WISE W3 magnitude (G3)
444-450 F7.2 mag e_W3 ?=-999.00 WISE W3 error
452-458 F7.2 --- W3SNR ?=-999.00 WISE W3 SNR (G4)
460-466 F7.2 mag W4 ?=-999.00 WISE W4 magnitude (G3)
468-474 F7.2 mag e_W4 ?=-999.00 WISE W4 error
476-482 F7.2 --- W4SNR ?=-999.00 WISE W4 SNR (G4)
484-486 A3 --- ExtW [yes no] 'yes' if extended WISE source
488-490 A3 --- RejW [yes no] 'yes' if WISE counterpart failed
photometry quality control checks
492-503 I12 --- UKIDSS ? UKIDSS ID
505-511 F7.2 deg RAUdeg ?=-999.00 UKIDSS right ascension (J2000)
513-519 F7.2 deg DEUdeg ?=-999.00 UKIDSS declination (J2000)
521-528 F8.3 --- RelU ?=-999.00 MLE reliability of UKIDSS match
to X-ray source
530-536 F7.2 arcsec rU ?=-999.00 Distance between X-ray and UKIDSS
sources
538-544 F7.2 mag Ymag ?=-999.00 UKIDSS Y magnitude
546-552 F7.2 mag e_Ymag ?=-999.00 UKIDSS Y magnitude error
554-560 F7.2 mag Hmag ?=-999.00 UKIDSS H magnitude
562-568 F7.2 mag e_Hmag ?=-999.00 UKIDSS H magnitude error
570-576 F7.2 mag Jmag ?=-999.00 UKIDSS J magnitude
578-584 F7.2 mag e_Jmag ?=-999.00 UKIDSS J magnitude error
586-592 F7.2 mag Kmag ?=-999.00 UKIDSS K magnitude
594-600 F7.2 mag e_Kmag ?=-999.00 UKIDSS K magnitude error
602-604 A3 --- RejU [yes no] 'yes' if UKIDSS counterpart failed
photometry quality control checks
607-625 I19 --- GALEX ? GALEX ObjID
627-633 F7.2 deg RAGdeg ?=-999.00 GALEX right ascension (J2000)
635-641 F7.2 deg DEGdeg ?=-999.00 GALEX declination (J2000)
643-649 F7.2 arcsec ePosN ?=-999.00 GALEX NUV positional error
651-657 F7.2 arcsec ePosF ?=-999.00 GALEX FUV positional error
659-665 F7.2 --- RelG ?=-999.00 MLE reliability of GALEX match to
X-ray source
667-673 F7.2 arcsec rG ?=-999.00 Distance between X-ray and GALEX
sources
675-681 F7.2 mag NUV ?=-999.00 GALEX NUV magnitude
683-689 F7.2 mag e_NUV ?=-999.00 GALEX NUV magnitude error
691-697 F7.2 mag FUV ?=-999.00 GALEX FUV magnitude
699-705 F7.2 mag e_FUV ?=-999.00 GALEX FUV magnitude error
708-712 A5 --- --- [FIRST]
714-729 A16 --- FIRST IAU name of FIRST counterpart
(JHHMMSS.s+DDMMSS)
731-737 F7.2 deg RAFdeg ?=-999.00 FIRST right ascension (J2000)
739-745 F7.2 deg DEFdeg ?=-999.00 FIRST declination (J2000)
747-753 F7.2 arcsec rF ?=-999.00 Distance between X-ray and FIRST
sources
755-761 F7.2 mJy FF ?=-999.00 FIRST 1.4GHz flux density
763-769 F7.2 mJy e_FF ?=-999.00 FIRST 1.4GHZ flux density error
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Note (1): Set to 0 if det_ml<15 in that band.
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Global notes:
Note (G2): Spectrosocpic redshift source as follows:
0 = SDSS
1 = 2SLAQ
2 = WiggleZ
3 = DEEP2
4 = SDSS spectrum re-fit/verified by us
Note (G3): magnitude from profile-fitting photometry unless the ExtW flag
is set to 'yes', in which case the magnitudes are associated with
elliptical apertures
Note (G4): upper limit if SNR<2.
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Acknowledgements:
Stephanie LaMassa, stephanie.lamassa(at)yale.edu
History:
* 26-Mar-2014: Original version
* 01-May-2014: new version, with 1 more decimal in X-ray position,
from author (Stephanie LaMassa)
(End) Stephanie LaMassa [Yale University], Patricia Vannier [CDS] 26-Mar-2014