Overview Science Goals ApJ Intro paper Appendix Team and contacts Publications and Presentations Papers Talks Posters Rapid Release Chandra Survey Selection Criteria Fields Observed NOAO Survey Fields Observed Data Archive X-ray Database Optical Database DS9 Virtual Observatory Quantile Analysis Chandra pointings for ChaMPane Bulge Windows Survey Bulge Latitude Survey Internal Related Links The ChaMPlane survey is being conducted at the Harvard-Smithsonian Center for Astrophysics.

Early Results GRO J0422+32 field GRO J0422+32 is a Black Hole X-ray Nova (BHXN) discovered in outburst by GRO/BATSE on 5 August 1992. Dynamical data establish that its primary is a black hole with mass that likely exceeds ~ 9 M_solar and may be as high as ~ 28 M_solar. Chandra observation of J0422+32 for 20 ksec was made on October 10, 2000 as part of a study of black hole event horizons (PI: McClintock). 66 X-ray sources (0.5-7.0 keV) were detected on 5 ACIS chips (I1-4 & S2), including J0422+32 which was placed at the telescope aim point on ACIS-I3. Photometry of J0422+32 was done on December 5, 2000 using KPNO/Mosaic with V, R, I and H-alpha filters. Following images show the ChaMPlane early results of the J0422_32 field. ChaMPlane X-ray source positions (green circles) superimposed on optical Mosaic image (stacked 10 dithered R images; total exposure time: 2100 sec) of J0422+32 field (North-up, East-left). White squares denote H-alpha emission sources, 3 of which are Chandra sources. Large green squares (8' x 8' each) are the Chandra ACIS overlay. The same image as above but zoomed in by a factor of 2 centered at the aimpoint of ACIS-I (small greem diamond at the center). The same image as above but zoomed in by a another factor of 2. J0422+32 is at the center of the green circle boxed by a white square at the center of the image.