GBM Science GBM Pulsar Project

GBM Pulsars
Source Name lii (deg) bii (deg)
GX 1+4 1.944.79
Her X-1 58.2037.50
Cep X-4 99.013.31
EXO 2030+375 77.15-1.24
V 0332+53 146.05-2.19
A 0535+26 181.50-2.64
MXB 0656-072 220.20-1.76
Vela X-1 263.063.90
Swift J0513.4-6547 275.99-34.55
GRO J1008-57 283.00-1.80
A 1118-615 292.50-0.90
Cen X-3 292.100.30
GX 301-2 300.10-0.04
2S 1417-624 313.02-1.60
4U 1626-67 321.79-13.09
4U 1538-52 327.422.16
OAO 1657-415 344.400.31

GBM Accreting Pulsar Histories

For each source we plot the history of pulse frequency and pulsed flux measured using the Fermi Gamma-Ray Burst Monitor (GBM) NaI detectors. For these measurements we use the CTIME data which normally has 0.256 s time bins, and eight energy channels. Our analysis normally uses channels 1 (12-25 keV) and 2 (25-55 keV). The integration intervals used varys from source to source, ranging from one to four days. For elipsing systems each egress to ingress interval is divide into an integral number of equal parts, with no measurement made during the eclipse. The measured frequencies are barycentered. For sources where the binary orbit is known the frequencies are corrected for the binary motion. The R.M.S. pulsed flux is given in the energy band that the pulse search was made. This usually includes only the first and second harmonics. These results are preliminary. Please contact Mark Finger for further information.

Please return to GBM Science or the GLAST Burst Monitor or the Gamma Ray Astrophysics Home Page.


Modification date: 19 Nov, 2009

Author Valerie Connaughton
Responsible Manager Jerry Fishman
Site Curator Valerie Connaughton