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Cep X-4 (JNAME: J2139+569)

Link to Riken Public Page of Cep X-4

Category: Star
Subcategory: HMXB

(RA, Dec) = ( 324.88 , 56.99 ); (l, b) = ( 99.0 , 3.3 )

Last update of this page: Fri Oct 28 09:11:33 +0900 2016
The one-week-binned light curves in this page were created by rebinning the MAXI public one-day-light curves (available at by using the formula,
which is only appropriate if the following two conditions are fulfilled:
Condition 1. Raw data are background dominant;
Condition 2. Background rates are constant (at least, during the time span of rebinning, that is, one week).
To make one-week-binned light curves for scientific papers without assuming the two conditions, we need to go back to event files with effective exposure information, or light curves with effective exposure information.

1. One bin per week: Cep X-4 (JNAME: J2139+569)

(only with statistically rich bins, each including at least four day-bins.)

J2139+569_weekbin_ge4days.jpg J2139+569_weekbin_ge4days_hires.jpg J2139+569_weekbin_ge4days_hires_410.jpg
J2139+569_weekbin_ge4days_hires_410nodate.jpg J2139+569_weekbin_ge4days.pdf


JPEG light curve

2. One bin per week: Cep X-4 (JNAME: J2139+569)

(including statistically poor bins)

J2139+569_weekbin.jpg J2139+569_weekbin_hires.jpg J2139+569_weekbin.pdf


JPEG light curve

3. One bin per day: Cep X-4 (JNAME: J2139+569)

J2139+569.jpg J2139+569_hires.jpg J2139+569_hires_410.jpg
J2139+569_hires_410nodate.jpg J2139+569.pdf


JPEG light curve

4. One bin per orbit: Cep X-4 (JNAME: J2139+569)

J2139+569_orb.jpg J2139+569_orb_hires.jpg J2139+569_orb.pdf


JPEG light curve