J/ApJ/563/L49 IR counterpart of the X-ray pulsar 1E 2259+586 (Hulleman+, 2001)
A possible faint near-infrared counterpart to the anomalous
X-ray pulsar 1E 2259+586.
Hulleman F., Tennant A.F., van Kerkwijk M.H., Kulkarni S.R., Kouveliotou C.,
Patel S.K.
<Astrophys. J. 563, L49 (2001)>
=2001ApJ...563L..49H 2001ApJ...563L..49H
ADC_Keywords: Pulsars ; X-ray sources ; Infrared sources ; Cross identifications
Keywords: stars: neutron - X-rays: individual (1E 2259+586) - X-rays: stars
Abstract:
We present near-infrared and optical observations of the field of the
anomalous X-ray pulsar 1E 2259+586 taken with the Keck telescope. We
derive a sub-arcsecond Chandra position and tie it to our optical
reference frame using other stars in the field. We find a very faint
source, KS=21.7±0.2mag, with a position coincident with the
Chandra position. We argue that this is the counterpart. In the J, I,
and R bands, we derive (2σ) limits of 23.8, 25.6, and 26.4mag,
respectively. As with 4U 0142+61, for which a counterpart has
previously been found, our results are inconsistent with models in
which the source is powered by accretion from a disk but may be
consistent with the magnetar model.
Objects:
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RA (2000) DE Designation(s)
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23 01 07.9 +58 52 46 1E 2259+58.6 = 2E 2259.0+5836
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 54 27 Positions and magnitudes of selected objects
table2.dat 90 15 Chandra X-ray point sources on S3 and
their (tentative) counterparts
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Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 2 A2 --- [HTV2001] Object designation
4- 5 I2 h RAh Right ascension (J2000.0)
7- 8 I2 min RAm Right ascension (J2000.0)
10- 15 F6.3 s RAs Right ascension (J2000.0)
17 A1 --- DE- Declination sign (J2000.0)
18- 19 I2 deg DEd Declination (J2000.0)
21- 22 I2 arcmin DEm Declination (J2000.0)
24- 28 F5.2 arcsec DEs Declination (J2000.0)
30- 35 F6.3 mag Jmag ? J magnitude
37- 41 F5.3 mag e_Jmag ? rms uncertainty on Jmag
43- 48 F6.3 mag Ksmag Ks magnitude
50- 54 F5.3 mag e_Ksmag rms uncertainty on Ksmag
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Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 2 A2 --- [HTV2001] Name of the X-ray source (XN)
4 A1 --- n_[HTV2001] [be] Individual notes (1)
6- 8 F3.1 arcsec Size Approximate image size of the X-ray source
10- 12 I3 --- Ct Number of counts detected of the X-ray source
14- 15 I2 h RAh X-ray source Right ascension (J2000.0)
17- 18 I2 min RAm X-ray source Right ascension (J2000.0)
20- 25 F6.3 s RAs X-ray source Right ascension (J2000.0)
27 A1 --- DE- X-ray source Declination sign (J2000.0)
28- 29 I2 deg DEd X-ray source Declination (J2000.0)
31- 32 I2 arcmin DEm X-ray source Declination (J2000.0)
34- 38 F5.2 arcsec DEs X-ray source Declination (J2000.0)
40- 43 F4.2 arcsec r.99 X-ray source 99% confidence error radius
45- 57 A13 --- Name Name of the possible counterpart
59 A1 --- n_Name [cd] Note on Name (1)
61- 62 I2 h RACh ? Counterpart right ascension (J2000.0)
64- 65 I2 min RACm ? Counterpart right ascension (J2000.0)
67- 72 F6.3 s RACs ? Counterpart right ascension (J2000.0)
74 A1 --- DEC- ? Counterpart declination sign (J2000.0)
75- 76 I2 deg DECd ? Counterpart declination (J2000.0)
78- 79 I2 arcmin DECm ? Counterpart declination (J2000.0)
81- 85 F5.2 arcsec DECs ? Counterpart declination (J2000.0)
87- 90 F4.2 arcsec rC.99 ? Counterpart 99% confidence error radius
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Note (1): Notes as follows:
b = X1 and X2 are RP1 and RP2 of Rho & Petre (1997ApJ...484..828R 1997ApJ...484..828R),
respectively.
c = USNO-A2.0 identifier.
d = Epochs are 1953.830 for DSS1 and USNO-A2.0,
1989.668 for DSS2, and 2000.885 for P60.
e = There is an extended source at this position on the edge of a
plate taken with LRIS in 1997.
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History:
From electronic version of the journal
(End) James Marcout, Patricia Bauer [CDS] 24-Apr-2002