MAXI team reported three detections of the transient events to Astronomer’s Telegram (ATEL) in October, 2010.
2990: Short X-ray Transient Detection by MAXI/GSC Tomida 2010 Oct 31 9:49
2970: MAXI/GSC detects a new activity from Be pulsar A0535+262 Mihara, 2010 Oct 25 21:33
2959: MAXI/GSC detects an X-ray transient MAXI J1409-619 Yamaoka, 2010 Oct 20 11:06
The MAXI/GSC has detected a faint X-ray transient, MAXI J1409-619, with a position of (R.A., Dec) = (212.26, -61.95) = (14h09m02s.4, -61d57m00s.0) (J2000) with a typical error of about 0.2 degrees.
The 4-10 keV images and light curves taken by GSC are shown below. Detailed results will be reported in an ATel. The bright dMe star 1RXS J141108.2-615601 is marginally within an error circle, but follow-up observations are required to solve the nature of this source.
MAXI/GSC detected GRB 100510A on 2010-05-10 from 19:27:09 to 19:27:37 (UT). It is temporary coincident with the Fermi-GBM Trigger #295212428. The source is clearly seen in the all-sky image (top figure). The error region is shown in the middle figure. Here, the 90% statistical error region is shown in small box, assuming the constant flux during the 50 sec scan transit of MAXI FoV. The larger box shows the error region without assumptions on the source constancy. The upper-right region (a part of large circle) shows the error region of Fermi-GBM flight position (The ground position is inconsistent with the MAXI position). The bottom figure shows the light curve of the burst. The details are reported in the GCN circular.
Top: All sky plot in galactic coordinate. Bottom left: Northern hemisphere. Bottom right: Southern hemisphere.
MAXI team reported 0 detection of the transient events to Astronomer’s Telegram (ATEL) in April, 2010.
And MAXI team also reported one GRB event to GCN: The Gamma-ray bursts Coordinates Network.
MAXI/GSC detected an X-ray transient at 2010-03-11 02:42:38 (UT). Figure shows the 90% statistical error box region. We have reported the news to Astronomers Telegram #2476.
The MAXI team reported a detection of a transient X-ray source to GCN (#10359) and Atel (#2415). The pictures above show the error box of the position and the light curve (in 2-20 keV) of the transient.
We had the second detection of a gamma-ray burst (GRB 090926B) with GSC. The raw light curve (not corrected for collimator response) and the raw source image is shown below. An interesting point is that the detection by MAXI is 17 seconds earlier than the Swift trigger, and the transit duration (~30 s) is shorter than normal (40-60 s for a steady source). Probably the GRB started in the middle of the transit, and the tail of the burst is truncated at the end of the transit. Therefore, the light curve and the source image are complicated products of triangular collimator response and the GRB time profile. (Link to the GCN Circular)
We had the first detection of a gamma-ray burst (GRB 090831) with GSC. The discovery sky image is attached below. The pale blue dot near the upper-left edge is the GRB. The transit light curve taken with a GSC Camera is also shown in the right. We reported the detection to GCN (Gamma-ray burst Coordinate Network) at NASA (link to the message).
