1 Crab = 74 SSC cts/sec

This is the 1998 archive.

31 December, 1998 --

18 December, 1998 --

8 December, 1998 --

Note: The sun continues to interfere w/ observations of sources toward the Galactic Center.

2 December, 1998 --

Note: Solar interference in the galactic center region has been and will be significant for another month or two.

25 November, 1998 --

16 November, 1998 --

10 November, 1998 --

2 November, 1998 --

28 October, 1998 --

19 October, 1998 --

Note: The S/C was not operational for 2.5 days during week 142 due to a problem from a SEU (i.e., Friday night, Oct. 16 through Monday, Oct. 19).

13 October, 1998 --

5 October, 1998 --

Note: For unclear reasons, the coverage of the galactic plane (11 - 17 h) was very sparse this week.

1 October, 1998 --

23 September, 1998 --

17 September, 1998 --

Note for week 137: XTE J1946+274 (= GRO J1944+26) ?= 3A 1942+274 was detected at ~80 mCrab; it is a newly active pulsar with a 15 s pulse period.

8 September, 1998 --

Note for week 136 results:

XTE J1551-56 - This new source was first detected on 1998 Sept. 7 and rose to > 0.4 Crab. See the IAU Circulars for more information.

2 September, 1998 --

25 August, 1998 --

18 August, 1998 --

12 August, 1998 --

5 August, 1998 --

23 July, 1998 --

23 July, 1998 --

6 July, 1998 --

6 July, 1998 --

2 July, 1998 --

Note: A new source, XTE J2123-058 was found with the ASM early in week 126. See the IAU circulars for details.

22 June, 1998 --

17 June, 1998 --

9 June, 1998 --

1 June, 1998 --

26 May, 1998 --

19 May, 1998 --

12 May, 1998 --

There was a lot of solar activity during week 118 that raised the energetic particle background and the background from scattered solar X-rays. Between 2 and 4 days of observations were lost because of these conditions.

5 May, 1998 --

Note: During the first half of week 118, we have had operational outages due to the consequences of an X1 solar flare on May 1 and the ensuing magnetic storm on May 4.

28 April, 1998 --

23 April, 1998 --

14 April, 1998 --

6 April, 1998 --

3 April, 1998 --

Advance notice:
A new transient, XTE J0421+56 has been discovered in week 113.

27 March, 1998 --

18 March, 1998 --

11 March, 1998 --

4 March, 1998 --

20 February, 1998 --

10 February, 1998 --

5 February, 1998 --

Advance notice re next week:

X1730-333 (Rapid Burster), X1608-522, x1630-47 are all in outburst.

21 January, 1998 --

14 January, 1998 --

8 January, 1998 --

2 January, 1998 --

View current activity reports.

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