SGR 1806-20

Query : SGR 1806-20

Basic data :

PSR J1808-2024 -- Pulsar
Origin of the objects types : (Ref) Object type as listed in the reference "Ref" (acronym) Object type linked to the acronym according to the original reference () Anterior to 2007, before we can link the objet type to a reference, or given by the CDS team in some particular cases Other object types:	`X (AX,CXOU,...)`, `gB (GBS,GRB,...)`, `Psr (2012ApJ,PSR)`, `gam (INTEGRAL1,INTREF)`, `Rad (MITG)`, `IR ([FMC99])`
Syntax of coordinates is : "ra dec (wtype) [error ellipse] quality bibcode" : ra dec : right ascension and declination (unit and frame defined according to your Output Options) Grey values are increasing the original precision due to the computation of frame transformations (wtype) : wavelength class for the origin of the coordinates (Rad, mm, IR, Optical, UV, Xray, Gam) [error ellipse] : measurement uncertainty, on (ra,dec) if the positional angle is 90 degrees, on (majaxis,minaxis) otherwise (in mas at defined epoch in the original catalogue), position angle (in degrees North celestial pole to East) quality : flag of quality E ≥ 10" D : 1-10" (and some old data) C : 0.1-1" B : 0.01-0.1" + 2MASS, Tyc A : VLBI, Hipparcos bibcode : bibcode of the coordinates reference ICRS coord. (ep=J2000) :	`18 08 39.32 -20 24 40.1 (X-ray) [ 100 100 90 ] C 2012ApJ...756...27L`
Syntax of coordinates is : "ra dec (wtype) [error ellipse] quality bibcode" : ra dec : right ascension and declination (unit and frame defined according to your Output Options) Grey values are increasing the original precision due to the computation of frame transformations (wtype) : wavelength class for the origin of the coordinates (Rad, mm, IR, Optical, UV, Xray, Gam) [error ellipse] : measurement uncertainty, on (ra,dec) if the positional angle is 90 degrees, on (majaxis,minaxis) otherwise (in mas at defined epoch in the original catalogue), position angle (in degrees North celestial pole to East) quality : flag of quality E ≥ 10" D : 1-10" (and some old data) C : 0.1-1" B : 0.01-0.1" + 2MASS, Tyc A : VLBI, Hipparcos bibcode : bibcode of the coordinates reference FK5 coord. (ep=J2000 eq=2000) :	`18 08 39.33 -20 24 40.1 [ 100 100 90 ]`
Syntax of coordinates is : "ra dec (wtype) [error ellipse] quality bibcode" : ra dec : right ascension and declination (unit and frame defined according to your Output Options) Grey values are increasing the original precision due to the computation of frame transformations (wtype) : wavelength class for the origin of the coordinates (Rad, mm, IR, Optical, UV, Xray, Gam) [error ellipse] : measurement uncertainty, on (ra,dec) if the positional angle is 90 degrees, on (majaxis,minaxis) otherwise (in mas at defined epoch in the original catalogue), position angle (in degrees North celestial pole to East) quality : flag of quality E ≥ 10" D : 1-10" (and some old data) C : 0.1-1" B : 0.01-0.1" + 2MASS, Tyc A : VLBI, Hipparcos bibcode : bibcode of the coordinates reference FK4 coord. (ep=B1950 eq=1950) :	`18 05 40.68 -20 25 11.4 [ 100 100 90 ]`
Syntax of coordinates is : "ra dec (wtype) [error ellipse] quality bibcode" : ra dec : right ascension and declination (unit and frame defined according to your Output Options) Grey values are increasing the original precision due to the computation of frame transformations (wtype) : wavelength class for the origin of the coordinates (Rad, mm, IR, Optical, UV, Xray, Gam) [error ellipse] : measurement uncertainty, on (ra,dec) if the positional angle is 90 degrees, on (majaxis,minaxis) otherwise (in mas at defined epoch in the original catalogue), position angle (in degrees North celestial pole to East) quality : flag of quality E ≥ 10" D : 1-10" (and some old data) C : 0.1-1" B : 0.01-0.1" + 2MASS, Tyc A : VLBI, Hipparcos bibcode : bibcode of the coordinates reference Gal coord. (ep=J2000) :	`009.99584 -00.24194 [ 100 100 90 ]`

', {sourceSize:12, color:'#30a090'})); aladin.on('objectClicked', function(object) { var objName=object.data.MAIN_ID; aladin.showPopup(object.ra,object.dec,'',''+ objName+''); });" title="Show Simbad objects"> Overlay Simbad

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2MASS DSS

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has a luminous very massive companion : NAME LBV 1806-20

Hierarchy : number of linked objects
whatever the membership probability is (see description here ) :

An access of full data is available using the icon Vizier near the identifier of the catalogue

`PSR J1808-2024`	`GRB 041227`	`KONUS 07.01.79`	`SWIFT J1808.6-2024`
`AX 1805.7-2025`	`HETE Trigger 3800`	`MITG J1808-2024`	`2XMM J180839.2-202439`
`CXOU J180839.3-202439`	`HETE Trigger 3801`	`NAME Sgr 1806-20`	`[ABH87] 25`
`GBS 1806-20`	`HETE Trigger 1566`	`PBC J1808.5-2025`	`[FMC99] O`
`GRB 970912`	`INTEGRAL1 84`	`RX J1808.6-2024`	`[KRL2007b] 305`
`GRB 790107`	`INTREF 882`	`SWIFT J1808.7-2024`	`EQ 1805.7-2025`

References (189 between 2019 and 2024) (Total 1242)
Simbad bibliographic survey began in 1850 for stars (at least bright stars) and in 1983 for all other objects (outside the solar system).

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Collections of Measurements

Warning : measurements from IRAS, IRC, SAO, CL.g (ACO), GJ have been removed
(they are still available using the icon Vizier near the identifier of the catalogue, or at the bottom of the page in the section "External links" to get the full data)

distance (1)

 | distance Q unit|  err-        err+     | method |     reference     |
 -----------------------------------------------------------------------
 |   15.1     kpc |  -1.3        +1.8     |        |2004A&A...419..191C|

Observing logs

iso (11)

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Note: Quick-look images of the data, and specific documentation, are accessible by clicking on the TDT observation identifier

VI/111/isolog
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ISO Observation Log (ISO Data Centre, 2004) [ReadMe+ftp]

*The ISO Observation Log[image] (36737 rows) (Note)

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 Full      _r        TDT    AOT    minLam  maxLam  Target                                 oStart         oLen    recno   FOV                  RAJ2000   DEJ2000 cal  ObsID    abs  PropID  
        arcmin                      um      um                                             s             s                                     deg       deg                              

    1     0.218  50401505  PHT32  187.07  216.69  SGR1806-20                      1997-04-03T21:03:10    464     21595  365"x181"           272.1677  -20.4115      KHURLEY  +    SGRQUIES
    2     0.222  49301104  SWS01    2.38   45.22  SGR1806-20                      1997-03-23T11:48:04   1912     21222  33"x20"             272.1678  -20.4113      KHURLEY  +    SGRQUIE2
    3     0.222  49301301  LWS01   43.12  188.65  SGR1806-20                      1997-03-23T12:39:24    730     21225  84" D               272.1678  -20.4113      KHURLEY  +    SGRQUIE2
    4     0.228  49301109  PHT03   19.80   28.38  SGR1806-20                      1997-03-23T12:20:38    268     21223  23" D               272.1679  -20.4113      KHURLEY  +    SGRQUIE2
    5     0.228  49301206  PHT32   54.76   71.44  SGR1806-20                      1997-03-23T12:25:54    762     21224  255"x165"           272.1679  -20.4113      KHURLEY  +    SGRQUIE2
    6     0.228  70300802  CAM05   10.70   11.90  SGR1806                         1997-10-18T23:00:32   1832     29385  120"x120"           272.1679  -20.4113      KHURLEY       KHURL002
    7     0.246  50401431  CAM01    5.05    8.35  SGR1806                         1997-04-03T20:42:44   1176     21594  96"x96"             272.1682  -20.4116      FMIRABEL +    HEATDUST
    8     0.252  51501330  CAM01    5.41   17.05  SGR1806                         1997-04-14T12:29:45   6966     21856  132"x132"           272.1683  -20.4116      FMIRABEL +    HEATDUST
    9     5.476  70300701  CAM99   11.55   17.05  Dummy_SGR1806                   1997-10-18T22:58:42     54     29384  ------N/A------     272.2112  -20.4909      KHURLEY       KHURL002
   10     5.476  70300903  CAM99   -1.00   -1.00  Dummy_SGR1806                   1997-10-18T23:31:58     34     29386  192"x192"           272.2112  -20.4909      KHURLEY       KHURL002
   11     6.220  49301311  LWS01   43.12  188.65  SGR1806-20_BACKGROUND           1997-03-23T12:52:28    729     21226  84" D               272.0988  -20.4950      KHURLEY  +    SGRQUIE2

xmm (5)

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The 3 columns in color are computed by VizieR, and are not part of the original data.

B/xmm/xmmlog
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XMM-Newton Observation Log (XMM-Newton Science Operation Center, 2012) [ReadMe+ftp]

2002yCat....102009X

The XMM-Newton Observation log (2024-03-25)[image/fits] (17645 rows)

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 Full      _r        Obsno     PropDate   Object                           RAJ2000    DEJ2000           Obs0          ObsDur Image  PPSp   FITS XSAlink
        arcmin                    s                                         deg        deg              s              s                             

    1    0.0116  0148210101  2004-10-24  SGR 1806--20                    272.16375  -20.41097  2003-04-03T13:35:27    55511 FITS       PPSp  0148210101 Y
    2    0.0116  0148210401  2004-10-24  SGR 1806--20                    272.16375  -20.41097  2003-10-07T09:41:25    22418 FITS       PPSp  0148210401 Y
    3    0.0116  0205350101  2005-10-06  SGR 1806-20                     272.16375  -20.41097  2004-09-06T09:02:50    51912 FITS       PPSp  0205350101 Y
    4    0.0116  0164561101  2005-02-01  SGR 1806-20                     272.16375  -20.41097  2004-10-06T16:56:00    18918 FITS       PPSp  0164561101 Y
    5    0.0116  0164561301  2005-07-01  SGR 1806-20                     272.16375  -20.41097  2005-03-07T08:20:59    24918 FITS       PPSp  0164561301 Y

External archives :

Archive data at HEASARC - High-Energy Astrophysics Science Archive Research Center

Data at NED - NASA/IPAC Extragalactic Database : SGR 1806-20

Link by name to the catalogue in VizieR :

MITG J1808-2024

Search by coordinates in Vizier (radius: 5 arcsec)

NAME LBV 1806-20 is the named assigned to the very massive star discovered by van Kerkwijk, Kulkarni et al. in their 1995ApJ...444L..33V paper A luminous companion to NAME Sgr 1806-20. It is a candidate to the most massive star known (M(init) about 200 solar masses, and a luminosity estimated to $10^6$ solar).
The relation between the Soft-gamma Repeater SGR 1806-20 and the massive star LBV 1806-20 is not clear (they seem to be 12" apart), but both sources are associated to the giant HII complex W 31. It seems that the very strong wind from LBV 1806-20 is powering the nebula SNR 10.0-0.3, and that LBV 1806-20 and SGR 1806-20 are two members of the cluster [BDB2003] G010.00-00.24. An interesting map of the region is presented as Fig.1 of the summary paper by Corbel and Eikenberry (2004A&A...419..191C)

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