J/ApJ/783/122 AllWISE motion survey (Kirkpatrick+, 2014)
The AllWISE motion survey and the quest for cold subdwarfs.
Kirkpatrick J.D., Schneider A., Fajardo-Acosta S., Gelino C.R., Mace G.N.,
Wright E.L., Logsdon S.E., McLean I.S., Cushing M.C., Skrutskie M.F.,
Eisenhardt P.R., Stern D., Balokovic M., Burgasser A.J., Faherty J.K.,
Lansbury G.B., Rich J.A., Skrzypek N., Fowler J.W., Cutri R.M., Masci F.J.,
Conrow T., Grillmair C.J., Mccallon H.L., Beichman C.A., Marsh K.A.
<Astrophys. J., 783, 122 (2014)>
=2014ApJ...783..122K 2014ApJ...783..122K (SIMBAD/NED BibCode)
ADC_Keywords: Proper motions ; Photometry, infrared ; Stars, late-type ;
Stars, double and multiple ; Surveys
Keywords: brown dwarfs; catalogs; solar neighborhood;
stars: fundamental parameters; stars: low-mass; subdwarfs
Abstract:
The AllWISE processing pipeline has measured motions for all objects
detected on Wide-field Infrared Survey Explorer (WISE) images taken
between 2010 January and 2011 February. In this paper, we discuss new
capabilities made to the software pipeline in order to make motion
measurements possible, and we characterize the resulting data products
for use by future researchers. Using a stringent set of selection
criteria, we find 22445 objects that have significant AllWISE motions,
of which 3525 have motions that can be independently confirmed from
earlier Two Micron All Sky Survey (2MASS) images, yet lack any
published motions in SIMBAD. Another 58 sources lack 2MASS
counterparts and are presented as motion candidates only. Limited
spectroscopic follow-up of this list has already revealed eight new L
subdwarfs. These may provide the first hints of a "subdwarf gap" at
mid-L types that would indicate the break between the stellar and
substellar populations at low metallicities (i.e., old ages). Another
object in the motion list --WISEA J154045.67-510139.3-- is a bright
(J∼9mag) object of type M6; both the spectrophotometric distance and a
crude preliminary parallax place it ∼6pc from the Sun. We also compare
our list of motion objects to the recently published list of 762 WISE
motion objects from Luhman (2014, J/ApJ/781/4). While these first
large motion studies with WISE data have been very successful in
revealing previously overlooked nearby dwarfs, both studies missed
objects that the other found, demonstrating that many other nearby
objects likely await discovery in the AllWISE data products.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 116 110 Common-proper-motion binaries noted during AllWISE
quality checks
table3.dat 138 3525 AllWISE motion discoveries
table4.dat 74 58 *AllWISE motion candidates lacking 2MASS counterparts
notes.dat 899 124 Notes on individual objects
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Note on table4.dat: Most of the objects in this list are believed not to be
actual motion sources. See the text for details.
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See also:
II/328 : AllWISE Data Release (Cutri+ 2013)
I/322 : UCAC4 Catalogue (Zacharias+, 2012)
I/311 : Hipparcos, the New Reduction (van Leeuwen, 2007)
I/298 : LSPM-North Catalog (Lepine+ 2005)
II/246 : 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)
I/259 : The Tycho-2 Catalogue (Hog+ 2000)
I/146 : Positions and Proper Motions - North (Roeser+, 1988)
J/ApJ/781/4 : Photom. of high proper motion objects from WISE (Luhman, 2014)
J/A+A/556/A15 : Effective temperature scale of M dwarfs (Rajpurohit+, 2013)
J/ApJS/201/19 : Hawaii Infrared Parallax Program. I. (Dupuy+, 2012)
J/ApJ/753/156 : T/Y brown dwarfs with WISE photometry (Kirkpatrick+, 2012)
J/ApJS/197/19 : First brown dwarfs discovered by WISE (Kirkpatrick+, 2011)
J/ApJ/743/138 : Spectroscopic survey of bright white dwarfs (Gianninas+, 2011)
J/ApJS/190/100 : NIR proper motion survey using 2MASS (Kirkpatrick+, 2010)
J/AJ/140/844 : UCAC3 proper motion survey (Finch+, 2010)
J/AJ/139/1808 : Colors and kinematics of SDSS L dwarfs (Schmidt+, 2010)
J/A+A/493/L27 : Parallaxes of 10 ultracool subdwarfs (Schilbach+, 2009)
J/AJ/136/1290 : Ultracool dwarfs from the 2MASS (Reid+, 2008)
J/AJ/135/785 : SDSS-DR5 low-mass star spectroscopic sample (West+, 2008)
J/A+A/479/155 : Proper motions of Galactic Planetary Nebulae (Kerber+, 2008)
J/AJ/133/439 : Luminosity function of M7-L8 ultracool dwarfs (Cruz+, 2007)
J/AJ/132/866 : New M dwarfs in solar neighborhood (Riaz+, 2006)
J/other/ARA+A/43.195 : L and T dwarf stars (Kirkpatrick, 2005)
J/AJ/127/2856 : Brown dwarfs in the 2MASS Survey (Burgasser+, 2004)
J/AJ/126/2421 : 2MASS-Selected sample of ultracool dwarfs (Cruz+, 2003)
J/A+A/402/963 : Stephenson Hα stars (Maheswar+, 2003)
J/ApJ/582/1011 : Revised NLTT Catalog (Salim+, 2003)
J/ApJ/476/311 : 2MASS M-dwarf discoveries (Kirkpatrick+ 1997)
J/A+AS/115/481 : New proper-motion stars -30<Dec←5, 0<RA<9h (Wroblewski+ 1996)
J/ApJS/94/749 : RI photometry of cool dwarfs (Kirkpatrick+ 1994)
J/AJ/105/1571 : USNO Photographic Parallaxes IX (Harrington+ 1993)
http://www.as.utexas.edu/~tdupuy/plx/Database_of_Ultracool_Parallaxes.html :
Online database of ultracool dwarfs with parallaxes
http://wise2.ipac.caltech.edu/docs/release/allsky/expsup/index.html :
Explanatory Supplement to the WISE All-Sky Data Release
Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 19 A19 --- WISEA WISEA designation (JHHMMSS.ss+DDMMSS.s)
21 A1 --- l_W1mag Upper limit flag on W1mag
23- 28 F6.3 mag W1mag [1.1/13.6] WISE W1 magnitude
30- 34 F5.3 mag e_W1mag [0.02/0.4]? W1mag uncertainty
36 A1 --- l_W2mag Upper limit flag on W2mag
38- 43 F6.3 mag W2mag [1.3/13.4] WISE W2 magnitude
45- 49 F5.3 mag e_W2mag [0.01/0.3]? W2mag uncertainty
51- 55 I5 mas/yr AWmotRA [-1478/2033] AllWISE apparent motion in RA
57- 58 I2 mas/yr e_AWmotRA [24/70] AWmotRA uncertainty
59 A1 --- f_AWmotRA [y] Flag on AWmotRA (1)
61- 65 I5 mas/yr AWmotDE [-1035/627] AllWISE apparent motion in DE
67- 68 I2 mas/yr e_AWmotDE [24/71] AWmotDE uncertainty
69 A1 --- f_AWmotDE [y] Flag on AWmotDE (1)
71-107 A37 --- Comm Other name(s)
109-110 A2 --- Note Note on WISEA (see notes.dat file)
112-116 F5.1 arcsec Sep [15.6/432.8]? Separation in arcsec
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Note (1):
y = This measurement should be treated with caution because the core of this
source is heavily saturated in the WISE images.
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Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1- 19 A19 --- WISEA WISEA designation (JHHMMSS.ss+DDMMSS.s)
21- 26 F6.3 mag Jmag [7.7/17] 2MASS J band magnitude
28- 33 F6.4 mag e_Jmag [0/0.2] Uncertainty in Jmag
35- 40 F6.3 mag Hmag [7.1/16] 2MASS H band magnitude
42- 47 F6.4 mag e_Hmag [0/0.2] Uncertainty in Hmag
49- 54 F6.3 mag Ksmag [6.9/15.4] 2MASS Ks band magnitude
56- 61 F6.4 mag e_Ksmag [0/0.2] Uncertainty in Ksmag
63- 68 F6.3 mag W1mag [6.7/14.8] WISE W1 3.4 micron band magnitude
70- 74 F5.3 mag e_W1mag [0.02/0.2] Uncertainty in W1mag
76- 81 F6.3 mag W2mag [6.6/14.6] WISE W2 4.6 micron band magnitude
83- 87 F5.3 mag e_W2mag [0.01/0.06] Uncertainty in W2mag
89- 93 I5 mas/yr AWmotRA [-1659/1535] AllWISE apparent motion in RA
95- 97 I3 mas/yr e_AWmotRA [21/184] Uncertainty in AWmotRA
99-103 I5 mas/yr AWmotDE [-1666/1643] AllWISE apparent motion in Dec
105-107 I3 mas/yr e_AWmotDE [21/206] Uncertainty in AWmotDE
109-115 F7.1 mas/yr pmRA [-1441/1978] Computed proper motion in RA (1)
117-120 F4.1 mas/yr e_pmRA [5/40] Uncertainty in pmRA
122-128 F7.1 mas/yr pmDE [-1314/1694] Computed proper motion in Dec (1)
130-133 F4.1 mas/yr e_pmDE [5/55] Uncertainty in pmDE
135 I1 --- Flag [0/3]? Prior literature flag (2)
137-138 A2 --- Note Note on WISEA (see notes.dat file)
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Note (1): Motion measured between the 2MASS and WISE epochs.
Note (2): Literature flag as follows:
0 = motion discovery unique to AllWISE.
1 = the only prior literature is an entry with similar motion in the
UCAC4 Catalog or other VizieR catalog holding not incorporated
into SIMBAD.
2 = object appears only in the Luhman (2014, J/ApJ/781/4) list.
3 = object appears both in the Luhman (2014, J/ApJ/781/4) list and in a prior
catalog not incorporated into SIMBAD.
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Byte-by-byte Description of file: table4.dat
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Bytes Format Units Label Explanations
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1- 19 A19 --- WISEA WISEA designation (JHHMMSS.ss+DDMMSS.s)
21- 26 F6.3 mag W1mag [13.2/17.5] WISE W1 magnitude
28- 32 F5.3 mag e_W1mag [0.02/0.2] W1mag uncertainty
34 A1 --- l_W2mag Upper limit flag on W2mag
36- 41 F6.3 mag W2mag [11/17] WISE W2 magnitude
43- 47 F5.3 mag e_W2mag [0.02/0.4]? W2mag uncertainty
49- 54 I6 mas/yr AWmotRA [-19976/7908] AllWISE apparent motion in RA
56- 58 I3 mas/yr e_AWmotRA [64/961] AWmotRA uncertainty
60- 65 I6 mas/yr AWmotDE [-13560/17804] AllWISE apparent motion in DE
67- 69 I3 mas/yr e_AWmotDE [69/962] AWmotDE uncertainty
71 I1 --- Flag [0/2]? Flag (1)
73- 74 A2 --- Note Note on WISEA (see notes.dat file)
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Note (1): Flag as follows:
0 = the source is a motion discovery unique to AllWISE.
1 = the source is believed to be a flux transient and not a motion object
because of its blue W1-W2 color.
2 = the object appears in Luhman (2014, J/ApJ/781/4).
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Byte-by-byte Description of file: notes.dat
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Bytes Format Units Label Explanations
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1- 2 A2 --- Note Note code
4-899 A896 --- Text Text of note
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History:
From electronic version of the journal
Reference:
Kirkpatrick et al. AllWISE2. 2016ApJS..224...36K 2016ApJS..224...36K Cat. J/ApJS/224/36
(End) Prepared by [AAS], Emmanuelle Perret [CDS] 11-May-2016