BD+30°3639 Common Name: Campbell's Star Distance: 1,200±120 pc (Li, Harrington & Borkowski 2002) Center of X-ray emission (J2000): 19h 34m 45.23s, +30° 30' 58.9'' X-ray size: 5''×4'' Description: ellipsoidal region of extended X-ray emission confined within the nebular elliptical shell observed in the optical (Kastner et al. 2000).

X-ray Optical X-ray + Optical

• Optical, infrared and radio images of BD+30°3639
• PDF version of this page

200068	587	ACIS-235678	19.0	17.4	2000-03-21	( 19h 34m 45.2s, +30° 30′ 59.1′′ )

Exposureuf => Exposure time of un-filtered event file Exposuref => Exposure time of filtered event file

Event files have been reprocessed using CIAO 3.2.1 and CALDB 3.0.3

X-ray images and spectra have been extracted from the reprocessed level 2 filtered event files.

ObsID	Level 2 FITS Event File (un-filtered)	Level 2 FITS Event File (filtered)	X-ray Images	Spectra and Calibration Files
630	4.8 MB	4.4 MB	3.0 MB	6.1 MB

• See Spectral Fit Page for detailed information on the spectral fits.
• Click on the regions below for more information on the regions used.

Nebula	0.25 - 2.5	4180±65	0.241±0.004	5.0×10-14	1.22×10-12	2.2×1032
	0.25 - 0.7	2440±50	0.140±0.003	...	...	...
	0.7 - 1.1	1390±35	0.080±0.002	...	...	...
	1.1 - 2.5	260±20	0.015±0.001	...	...	...

The X-ray fluxes and luminosities corresponds to the 0.45-2.5 keV energy band. These values are computed from the spectral models with the best statistical fit. Hydrogen column density of NH = 1.8×1021 cm-2 as derived from the spectral fit. The distance has been adopted to be 1,200 pc following Li, Harrington & Borkowski (2002)

• Images in Different Energy Bands
• "True Color" X-ray Picture
• Composite X-ray and Optical Picture

• Spectra and Spectral Fits

• Bernard-Salas et al. 2003, A&A 406, 165
  Nebular abundances of BD+30°3639 used for the X-ray spectral fit.
• Arnaud, Borkowski & Harrington 1996, ApJ 462, L75
  ROSAT pointed PSPC image and spectrum of BD+30°3639. This paper provides the wind abundances used for the spectral fit.
• Kastner et al. 2000, ApJ 545, L57
  Chandra discovery paper of diffuse X-ray emission from BD+30°3639 and spectral analysis.
• Kreysing et al. 1992, A&A 264, 623
  ROSAT detection paper of X-ray emission from BD+30°3639 based on RASS data.
• Leahy, Kwok & Yin 2000, ApJ 540, 442
  ROSAT pointed HRI image of BD+30°3639.
• Li, Harrington & Borkowski 2002, AJ 123, 2676
  Distance to BD+30°3639 based on its angular expansion.
• Maness et al. 2003, PASP 115, 1002
  Spectral analysis of the diffuse X-ray emission from BD+30°3639 discovered by Chandra. This paper uses different abundances (nebular, wind, and Ne and O enhanced wind abundances) for the spectral fit.

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