J/ApJ/615/887 Localization of SGR 1627-41 and AXP 1E1841-045 (Wachter+, 2004)
Precise localization of the soft gamma repeater SGR 1627-41 and the anomalous
X-ray pulsar AXP 1E1841-045 with Chandra.
Wachter S., Patel S.K., Kouveliotou C., Bouchet P., Ozel F., Tennant A.F.,
Woods P.M., Hurley K., Becker W., Slane P.
<Astrophys. J., 615, 887-896 (2004)>
=2004ApJ...615..887W 2004ApJ...615..887W
ADC_Keywords: Photometry, infrared ; X-ray sources ; Infrared sources
Keywords: gamma rays: bursts - infrared: stars -
stars: individual (1E 1841-045, SAX J1635.8-4736, SGR 1627-41) -
stars: neutron - X-rays: stars
Abstract:
We present precise localizations of AXP 1E1841-045 and SGR 1627-41
with Chandra. We obtained new infrared observations of SGR 1627-41 and
reanalyzed archival observations of AXP 1E1841-045 in order to refine
their positions and search for infrared counterparts.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 36 41 IR photometry in the field of AXP 1E1841-045
table3.dat 78 24 Chandra X-Ray point sources matching 2MASS
sources in the central 6' around SGR 1627-41
table4.dat 174 90 Chandra X-ray point sources near SGR 1627-41
table5.dat 62 5 Chandra X-Ray point sources matching 2MASS
sources for AXP 1E1841-045
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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 --- [MMC2001] Nomenclature from Mereghetti et al.
(2001MNRAS.321..143M 2001MNRAS.321..143M)
3 A1 --- f_[MMC2001] [*] Flag on [MMC2001] (1)
6- 10 F5.2 mag Ksmag Ks magnitude from this work
13- 16 F4.2 mag e_Ksmag Error in Ksmag
19- 23 F5.2 mag Ksmag2 Ks magnitude, from Mereghetti et al.
(2001MNRAS.321..143M 2001MNRAS.321..143M)
26- 30 F5.2 mag Ksmag3 ? Reanalyzed Ks magnitude, from
Mereghetti et al., 2001MNRAS.321..143M 2001MNRAS.321..143M
33- 36 F4.2 mag e_Ksmag3 ? Error in Ksmag3
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Note (1): An asterisk indicates a magnitude difference greater than 0.5.
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Byte-by-byte Description of file: table3.dat table5.dat
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Bytes Format Units Label Explanations
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1- 3 A3 --- Field Field (SGR for SGR 1627-41 or AXP for
AXP 1E1841-045)
5- 6 I2 h RAh Chandra Hour of Right Ascension (J2000)
8- 9 I2 min RAm Chandra Minute of Right Ascension (J2000)
11- 16 F6.3 s RAs Chandra Second of Right Ascension (J2000)
19 A1 --- DE- Chandra Sign of the Declination (J2000)
20- 21 I2 deg DEd Chandra Degree of Declination (J2000)
23- 24 I2 arcmin DEm Chandra Arcminute of Declination (J2000)
26- 30 F5.2 arcsec DEs Chandra Arcsecond of Declination (J2000)
32- 37 F6.3 arcsec oRA Offset of 2MASS counterpart in Right Ascension
40- 44 F5.2 arcsec oDE Offset in Declination
47- 62 A16 --- 2MASS 2MASS catalog name (Cat. II/246)
65- 77 A13 --- USNO-A2 USNO catalog name (Cat. I/252)
78 A1 --- u_USNO-A2 Uncertainty flag on USNO-A2
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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- 2 I2 --- [WPK2004] Source number
3- 4 A2 --- f_[WPK2004] Flag on [WPK2004] (1)
6- 7 I2 h RAh Chandra Hour of Right Ascension (J2000)
9- 10 I2 min RAm Chandra Minute of Right Ascension (J2000)
12- 17 F6.3 s RAs Chandra Second of Right Ascension (J2000)
19 A1 --- DE- Chandra Sign of the Declination (J2000)
20- 21 I2 deg DEd Chandra Degree of Declination (J2000)
23- 24 I2 arcmin DEm Chandra Arcminute of Declination (J2000)
26- 30 F5.2 arcsec DEs Chandra Arcsecond of Declination (J2000)
32- 35 F4.1 --- S/N The 0.7-7.0keV Chandra signal-to-noise
37- 42 F6.3 arcmin Offaxis The off-axis source distance
44- 59 A16 --- 2MASS Name of 2MASS counterpart
62- 81 A20 --- Com Comments (2)
84- 85 I2 h RAIh ? 2MASS Hour of Right Ascension (J2000)
87- 88 I2 min RAIm ? 2MASS Minute of Right Ascension (J2000)
90- 95 F6.3 s RAIs ? 2MASS Second of Right Ascension (J2000)
97 A1 --- DEI- 2MASS sign of Declination (J2000)
98- 99 I2 deg DEId ? 2MASS Degree of Declination (J2000)
101-102 I2 arcmin DEIm ? 2MASS Arcminute of Declination (J2000)
104-108 F5.2 arcsec DEIs ? 2MASS Arcsecond of Declination (J2000)
110-115 F6.3 mag Jmag ? 2MASS or measured J band magnitude
117-121 F5.3 mag e_Jmag ? The error in Jmag
123 A1 --- f_Jmag [n] Indicates highly uncertain 2MASS Jmag
125-130 F6.3 mag Hmag ? 2MASS or measured H band magnitude
132-136 F5.3 mag e_Hmag ? The error in Hmag
138 A1 --- f_Hmag [n] Indicates highly uncertain 2MASS Hmag
140-145 F6.3 mag Ksmag ? 2MASS or measured K band magnitude
147-151 F5.3 mag e_Ksmag ? The error in Ksmag
153 A1 --- f_Ksmag [n] Indicates highly uncertain 2MASS Ksmag
155-172 A18 --- IRCom Infrared comments (3)
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Note (1): Flag on [WPK2004], defined as follows:
* = within the FOV of the 1.5m image;
** = within the FOV of the 4m image;
Note (2): The comments indicate photometric data from our 1.5m and 4m images
Note (3): Infrared comments, defined as follows:
c = 1.5m measurement;
e = 4m measurement.
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History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Marianne Brouty [CDS] 20-May-2005