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Detailed Description of J/ApJS/238/32 :
3rd MAXI/GSC X-ray cat at high Galactic latitude (Kawamuro+, 2018)
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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.
J/ApJS/238/32 3rd MAXI/GSC X-ray cat at high Galactic latitude (Kawamuro+, 2018)
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The 7-year MAXI/GSC X-ray source catalog in the high Galactic latitude sky
(3MAXI).
Kawamuro T., Ueda Y., Shidatsu M., Hori T., Morii M., Nakahira S., Isobe N.,
Kawai N., Mihara T., Matsuoka M., Morita T., Nakajima M., Negoro H., Oda S.,
Sakamoto T., Serino M., Sugizaki M., Tanimoto A., Tomida H., Tsuboi Y.,
Tsunemi H., Ueno S., Yamaoka K., Yamada S., Yoshida A., Iwakiri W.,
Kawakubo Y., Sugawara Y., Sugita S., Tachibana Y., Yoshii T.
<Astrophys. J. Suppl. Ser., 238, 32 (2018)>
=2018ApJS..238...32K
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ADC_Keywords: X-ray sources ; Redshifts ; Cross identifications;
Clusters, galaxy; Active gal. nuclei
Keywords: catalogs ; galaxies: active ; galaxies: clusters: general ; surveys ;
X-rays: galaxies
Abstract:
We present the third MAXI/GSC catalog in the high Galactic latitude
sky (|b|>10°) based on the 7-year data from 2009 August 13 to 2016
July 31, complementary to that in the low Galactic latitude sky
(|b|<10°) (Hori+ 2018ApJS..235....7H). We compile 682 sources
detected at significances of sD,4-10keV>=6.5 in the 4-10keV band. A
two-dimensional image fit based on the Poisson likelihood algorithm
(C-statistics) is adopted for the detections and constraints on their
fluxes and positions. The 4-10keV sensitivity reaches ~0.48mCrab, or
~5.9x10-12erg/cm2/s, over half of the survey area. Compared with
the 37-month Hiroi+ (2013, J/ApJS/207/36) catalog, which adopted a
threshold of sD,4-10keV>=7, the source number increases by a factor
of ~1.4. The fluxes in the 3-4keV and 10-20keV bands are further
estimated, and hardness ratios (HRs) are calculated using the 3-4keV,
4-10keV, 3-10keV, and 10-20keV band fluxes. We also make the 4-10keV
light curves in 1-year bins for all the sources and characterize their
variabilities with an index based on a likelihood function and the
excess variance. Possible counterparts are found from five major X-ray
survey catalogs by Swift, Uhuru, RXTE, XMM-Newton, and ROSAT, as well
as an X-ray galaxy cluster catalog (MCXC). Our catalog provides the
fluxes, positions, detection significances, HRs, 1-year bin light
curves, variability indices, and counterpart candidates.
Description:
We analyze the Monitor of All-sky X-ray Image (MAXI)/Gas Slit Camera
(GSC) event data from 2009 August 13 to 2016 July 31 provided by
RIKEN, focusing on those at high Galactic latitudes (|b|>10°). The
same data-screening criteria as adopted by Hori+ (2018ApJS..235....7H
-- see their Section 2) are applied.
File Summary:
FileName Lrecl Records Explanations
× 80 . This file
× ReadMe 80 . This file
× table1.dat 177 682 X-ray properties of sources in the third MAXI/GSC
catalog
× table2.dat 113 682 Possible counterparts in the third MAXI/GSC catalog
× table3.dat 139 4 Properties of transient events
× lc3maxi.dat 65 5456 Data behind Appendix Figure A -- Lightcurves
in the 4-10keV band
× lct3maxi.dat 65 32 Data behind Appendix Figure B -- Lightcurves
in the 4-10keV band of 4 transient objects
detected from data binned in each year
See also:
IX/4 : Fourth UHURU Catalogue (4U) (Forman+ 1978)
IX/10 : ROSAT All-Sky Bright Source Catalogue (1RXS) (Voges+ 1999)
J/PASJ/63/S677 : MAXI/GSC catalog in high Galactic-latitude sky (Hiroi+, 2011)
J/A+A/534/A109 : MCXC Meta-Catalogue X-ray galaxy Clusters (Piffaretti+, 2011)
J/ApJS/199/31 : Fermi LAT second source catalog (2FGL) (Nolan+, 2012)
J/ApJS/207/19 : Hard X-ray survey from Swift-BAT 2004-2010 (Baumgartner+, 2013)
J/ApJS/207/36 : 2nd MAXI/GSC cat. in high galactic-latitude sky (Hiroi+, 2013)
J/ApJ/814/11 : Obscured AGNs from XMM-Newton and AKARI (Terashima+, 2015)
J/PASJ/68/S32 : MAXI/SSC catalog of X-ray sources in 0.7-7.0keV (Tomida+, 2016)
J/ApJS/235/4 : The 105-month Swift-BAT all-sky hard X-ray survey (Oh+, 2018)
Byte-by-byte Description of file: table1.dat
Bytes Format Units Label Explanations
1- 3 I3 --- Seq [1/682] Source number
5- 13 A9 --- 3MAXI MAXI name (JHHMM+DDd)
15- 21 F7.3 deg RAdeg Right ascension (J2000)
23- 29 F7.3 deg DEdeg Declination (J2000)
31- 35 F5.3 deg ePos [0/0.6] 1sigma statistical error of
the position
37- 42 F6.1 --- s4-10keV [6.5/9847] 4-10keV detection significance
44- 52 F9.2 10-12mW/m2 F4-10keV [4.3/181920] 4-10keV flux
54- 58 F5.2 10-12mW/m2 e_F4-10keV [0.6/18.5] Error of the 4-10keV flux
60- 66 F7.2 --- s3-4keV [0/6259]? 3-4keV detection significance
68- 75 F8.2 10-12mW/m2 F3-4keV [0.1/53114] 3-4 keV flux
77 A1 -- l_F3-4keV Limit flag on Flux34 (1)
79- 82 F4.2 10-12mW/m2 e_F3-4keV [0.2/8.5] Error of the 3-4keV flux (1)
84- 90 F7.2 --- s10-20keV [0/3557]? 10-20keV detection significance
92- 99 F8.2 10-12mW/m2 F10-20keV [0/68876] 10-20keV flux
101 A1 -- l_F10-20keV Limit flag on Flux1020 (1)
102-106 F5.2 10-12mW/m2 e_F10-20keV [1/20] Error of the 10-20keV flux (1)
108-116 F9.2 10-12mW/m2 F3-10keV [5/235034] 3-10keV flux
118-122 F5.2 10-12mW/m2 e_F3-10keV [0.7/20.3] Error of the 3-10keV flux
124-128 F5.2 --- HR1 [-0.4/0.9] Hardness ratio,
3-4keV and 4-10keV fluxes
130-133 F4.2 --- e_HR1 [0/0.2] Error of HR1
135-139 F5.2 --- HR2 [-1/0.6] Hardness ratio,
4-10keV and 10-20keV fluxes
141-144 F4.2 --- e_HR2 [0/1.8] Error of HR2
146-150 F5.2 --- HR3 [-1/0.7] Hardness ratio,
3-10keV and 10-20keV fluxes
152-155 F4.2 --- e_HR3 [0/2] Error of HR3
157-164 F8.2 --- TSVar [0.8/12714] Time variability index
166-171 F6.3 --- XVA [-0.2/7] Excess variance
173-177 F5.3 --- e_XVA [0/0.5] Error of the excess variance
Note (1): When a 1sigma error is larger than the best-fit value, the 1sigma
upper limit is represented.
Byte-by-byte Description of file: table2.dat
Bytes Format Units Label Explanations
1- 3 I3 --- Seq [1/682] Source number
5- 13 A9 --- 3MAXI MAXI name (JHHMM+DDd)
15- 39 A25 --- Name Counterpart name
41- 50 F10.6 deg RACdeg ? Counterpart Right Ascension (J2000)
52- 61 F10.6 deg DECdeg ? Counterpart Declination (J2000)
63- 71 F9.6 --- z [-0.0006/2.7]? Counterpart redshift
73- 99 A27 --- Type Counterpart source type
101-109 A9 --- Flag Cross-matching flag(s) (2)
111-113 A3 --- Note Note (3)
Note (2): Cross-matching flag represents that the source has more than one
counterpart. Flag as follow:
B = the Swift/BAT 105-month catalog (BAT105; Oh+ 2018, J/ApJS/235/4);
U = the Uhuru fourth catalog (4U; Forman+ 1978, IX/4);
X = the RXTE All-Sky Monitor long-term observed source table (XTEASMLONG --
http://heasarc.gsfc.nasa.gov/W3Browse/xte/xteasmlong.html);
M = Meta-Catalog of X-Ray Detected Clusters of Galaxies (MCXC;
Piffaretti+ 2011, J/A+A/534/A109);
N = the XMM-Newton slew survey catalog (XMMSL2 --
http://www.cosmos.esa.int/web/xmm-newton/xmmsl2-ug);
R = the ROSAT all-sky survey bright source catalog (1RXS; Voges+ 1999, IX/10).
Note (3): Note related to the identification of the counterpart as follows:
A = The auto-matching identifies a galaxy cluster, but this is likely
inconsistent with the significant variability (TSvar=87). Then,
we select a star as a plausible candidate of the counterpart.
B = We automatically find an obscured AGN from BAT105 as the
counterpart, but the very soft property is not so common to such
objects. Then, we find a bright object, CXO J092418.2-314217, in a
Swift/XRT soft X-ray image. According to a study by Tomsick+
(2017ApJS..230...25T), it can be classified as the LMXB or the CV,
and here we representatively adopt the LMXB.
C = One of the brightest galaxies is selected for the most plausible
counterpart.
Byte-by-byte Description of file: table3.dat
Bytes Format Units Label Explanations
1 I1 --- Seq [1/4] Running sequence number
3- 11 A9 --- 3MAXIt MAXI name (JHHMM+DDd)
13- 19 F7.3 deg RAdeg Right ascension in decimal degrees (J2000)
21- 27 F7.3 deg DEdeg Declination in decimal degrees (J2000)
29- 33 F5.3 deg ePos [0.06/0.2] 1sigma statistical error of the
position
35- 38 F4.1 --- s4-10keV [9/21] 4-10keV detection significance
40- 43 F4.1 10-15W/m2 F4-10keV [18/73] 4-10keV flux
45- 47 F3.1 10-15W/m2 e_F4-10keV [1/4] Error of the 4-10keV flux
49- 56 F8.3 --- TSVar [367/3487] Time variability index
58- 62 F5.3 --- XVA [3.2/5.8] Excess variance {sigma}2rms
64- 68 F5.3 --- e_XVA [0.3/0.9] XVA uncertainty
70- 87 A18 --- Name Counterpart name
89- 95 F7.3 deg RACdeg Counterpart right ascension (J2000)
97-103 F7.3 deg DECdeg Counterpart declination (J2000)
105-112 F8.6 --- z [0.00411]? Counterpart redshift
114-139 A26 --- Type Counterpart type
Byte-by-byte Description of file: lc3maxi.dat
Bytes Format Units Label Explanations
1- 7 A7 --- --- [3MAXI_ ]
8- 16 A9 --- 3MAXI MAXI name (JHHMM+DDd)
18- 21 I4 yr Year [2009/2016] Observation, Year
23- 29 F7.1 d MJD Observation, Modified Julian Date
31- 35 I5 d MJDSt Start, Modified Julian Date
37- 41 I5 d MJDEnd End, Modified Julian Date
43- 53 E11.6 Crab Flux [0/16] Flux, units of Crab
55- 65 E11.6 Crab e_Flux [1.6e-05/0.3] Error in Flux, units of Crab
Byte-by-byte Description of file: lct3maxi.dat
Bytes Format Units Label Explanations
1- 7 A7 --- --- [3MAXIt_]
8- 16 A9 --- 3MAXIt MAXI name (JHHMM+DDd)
18- 21 I4 yr Year [2009/2016] Observation, Year
23- 29 F7.1 d MJD Observation, Modified Julian Date
31- 35 I5 d MJDSt Start, Modified Julian Date
37- 41 I5 d MJDEnd End, Modified Julian Date
43- 53 E11.6 Crab Flux [0/16] Flux, units of Crab
55- 65 E11.6 Crab e_Flux [1.6e-05/0.3] Error in Flux, units of Crab
History:
From electronic version of the journal
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(End) Prepared by [AAS], Emmanuelle Perret [CDS] 30-Nov-2018