Kuehnel: Created page with "Category:Accreting X-ray Pulsars '''Also known as''': V* V4580 Sgr [http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=SAX+J1808.4-3658&submit=SIMBAD+search Simbad] '''M..."

2018-04-18T14:51:47Z

Created page with "Category:Accreting X-ray Pulsars '''Also known as''': V* V4580 Sgr [http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=SAX+J1808.4-3658&submit=SIMBAD+search Simbad] '''M..."

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[[Category:Accreting X-ray Pulsars]]

'''Also known as''': V* V4580 Sgr [http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=SAX+J1808.4-3658&submit=SIMBAD+search Simbad]

'''Monitoring Data''': [http://xte.mit.edu/asmlc/srcs/saxj1808.4-3658.html RXTE/ASM] [http://swift.gsfc.nasa.gov/docs/swift/results/transients/weak/SAXJ1808.4-3658/ Swift/BAT] [http://maxi.riken.jp/top/index.php?cid=1&jname=J1808-369 MAXI]

= Coordinates =

{| class="wikitable"
|RA
| 18h 08m 27.5s
| Dec
| -36º 58' 44.3''
|-
|l
| 355.4
| b
| -8.15
|}
=Binary System=
==Distance==
Approximately 2.5 kpc (<ref name="IntZand01" />)
==Orbit==

'''Period''': 2 hours (<ref name="ChakrabartyMorgan98" />)
==Companion==
'''Type''': Thought to be a brown dwarf.

'''Magnitude''':
* V = 21.5 (<ref name="Homer01" />)
=Available Data=
* '''RXTE''': Many observations from 1998 to 2011 for exposures ≤29 ksec.
* '''CHANDRA''': Two observations in 2005 for 14 ksec and 4 ksec, as well as one observation in 2011 for 100 ksec.
* '''XMM-Newton''': Observations from 2000 to 2007. Longest exposure 57 ksec.
* '''Swift''': Many observations from 2005 to 2011. Longest exposure 9 ksec.
* '''SUZAKU''': Many observations in 2008. Longest exposure 42 ksec.
=Flux=
* '''Luminosity in quiescence''': 5 x 1035 erg.s-1 (<ref name="Intzand98B" />)

Swift and RXTE observed the 2011 outburst and detected a flux of:
* '''F(2-10 keV)''' = 1.71 x 10-9 erg.cm-2.s-1
* '''F(2.5-25 keV)''' = 2.35 x 10-9 erg.cm-2.s-1 (<ref name="Papitto11" />)
=Pulse Profile=
'''Period''': 2.49 ms (<ref name="Wijnands98" />)

[[File:medium-fg3.gif|1511]]

Detailed pulse profiles taken from <ref name="Hartman08" />.

'''References'''

SAX J1808.4-3658 - Revision history

Kuehnel: Created page with "Category:Accreting X-ray Pulsars '''Also known as''': V* V4580 Sgr [http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=SAX+J1808.4-3658&submit=SIMBAD+search Simbad] '''M..."