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Description Catalog Data Default Radius (arcmin) Mission Table Type
Cygnus OB2 Association Chandra X-Ray Point Source Catalog 2 cygob2cxo2N
1
 CHANDRA Object

1. Enter any constraints on the query below. [ Help on constraint syntax ]

(What about wildcards, spaces, and case sensitivity?)

2. To change the fields that are returned, select the box in the "View" column beside each field desired.

3. To sort the results by any field, select one box in the "Sort" column beside the field to sort on.


 Parameter (Unit) Min Value Max Value Value Type
name CXOU J203116.1+412632 CXOU J203402.6+411937 string
ra 20 31 16.12 20 34 02.65 position
dec +41 04 45.2 +41 39 51.8 position
counts (ct) 0.92 30559.19 float
counts_neg_err (ct) 0.8 175.3 float
counts_pos_err (ct) 2.3 176.3 float
log_lx (log(erg/s)) 28.92 35.26 float
log_lx_neg_err (log(erg/s)) 0.01 3.93 float
log_lx_pos_err (log(erg/s)) 0.01 2.38 float
jmag (mag) 4.67 18.97 float
source_number 1 1696 integer
alt_name [WD2009] 1 [WD2009] 999 string
lii (degree) 79.97843 80.40501 float
bii (degree) 0.56682 1.21245 float
off_axis (arcmin) 0.00 1.49 float
extraction_area (pixel) 4 2060 integer
psf_fraction 0.39 0.91 float
snr 0.40 1700.00 float
log_bck_prob -6.00 -1.02 float
exposure (s) 13640 141870 float
median_energy (keV) 0.75 6.56 float
log_prob_constant -4.00 -0.00 float
count_rate (ct/s) 0.000016 0.400341 float
sb_count_rate (ct/s) -0.000026 0.215427 float
hb_count_rate (ct/s) -0.000105 0.184914 float
field_number 1 3 integer
source_flag N N string
spectral_model 1T 1T string
nh_limit < < string
log_nh (log(cm^-2)) 19.72 24.11 float
log_nh_pos_err (log(cm^-2)) 0.01 2.50 float
log_nh_neg_err (log(cm^-2)) 0.01 2.21 float
apec_kt_limit > > string
apec_kt (keV) 0.12 10.00 float
apec_kt_pos_err (keV) 0.28 9.84 float
apec_kt_neg_err (keV) 0.08 5.09 float
log_sb_lx (log(erg/s)) 29.37 35.26 float
log_hb_lx (log(erg/s)) 28.02 33.05 float
ra_oir 20 31 16.03 20 34 02.83 position
dec_oir +41 05 19.9 +41 39 50.2 position
off_set (arcsec) 0.010 3.520 float
rmag (mag) 12.10 22.71 float
rmag_error (mag) 0.00 0.38 float
imag (mag) 11.82 20.32 float
imag_error (mag) 0.00 0.21 float
halpha_mag (mag) 11.88 21.93 float
halpha_mag_error (mag) 0.000 0.580 float
jmag_error (mag) 0.000 0.320 float
hmag (mag) 3.51 17.89 float
hmag_error (mag) 0.000 0.910 float
ks_mag (mag) 2.70 17.34 float
ks_mag_error (mag) 0.000 9.990 float
near_ir_flags MMM UUU string
twomass_flags -A UUA string
afm2007_source_number 1 1003 integer
spect_type B O9V string
ref_spect_type H99 W73 string
opt_name [CPR2002] A11 [MT91] 696 string
class

4. Do you want to change your current query settings?


(e.g. 'Cyg X-1' or '12 00 00, 4 12 6')
Use semicolons (;) to separate multiple object names or coordinate pairs (e.g. 'Cyg X-2; 12.235, 15.345').
Default uses the optimum radius for each catalog searched.

Not all tables have observation dates/times. For those that do, the time portion of the date is optional.
Times are always in UTC. Separate multiple dates/ranges with semicolons (;). Range operator is '..'
(e.g. '1992-12-31; 48980.5; 1995-01-15 12:00:00; 1997-03-20 .. 2000-10-18').
rows
Select to display all catalog parameters instead of only defaults.

5.


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