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1 Crab = 74 SSC cts/sec

This is the 2006 archive.

5 January 2007 --

Week 570 results (2006 December 29 - 2007 January 4)

2 January 2007 --

Week 569 results (2006 December 22 - 28)

26 December 2006 --

Week 568 results (2006 December 15 - 21)

  • EXO0748-676 - remained near 25 mCrab
  • Cir X-1 - was as strong as ~330 mCrab
  • GX339-4 - ~60 mCrab
  • X1730-333 (the Rapid Burster) - on the basis of just a few observations (which are too few to be taken as more than 90% reliable) may be in outburst at ~130 mCrab

18 December 2006 --

Week 567 results (2006 December 8 - 14)

  • EXO0748-676 - varied in the range 25 to 40 mCrab
  • XTE J1701-462 - decreased to ~260 mCrab
  • GX339-4 - may be as strong as 50 mCrab
  • EXO2030+375 - declined from ~30 mCrab to less than 13 mCrab

11 December 2006 --

Week 566 results (2006 December 1 - 7)

  • EXO0748-676 - increased to ~30 mCrab
  • Cir X-1 - rose to ~200 mCrab
  • EXO2030+375 - varied in the range 0 to 50 mCrab

1 December 2006 --

Week 565 results (2006 November 24 - 30)

  • XTE J1701-462 - remained near 350 mCrab
  • X1822-000 - rose to ~35 mCrab
  • X1953+319 - ~20 mCrab
  • EXO2030+375 - decreased to ~20 mCrab
  • X2206+543 - below 15 mCrab or so

27 November 2006 --

Week 564 results (2006 November 17 - 23)

  • Cir X-1 - was as strong as ~60 mCrab
  • XTE J1701-462 - stronger (averaging ~360 mCrab) and more variable
  • EXO2030+375 - ~50 mCrab for the last 4 days of the week
  • X2206+543 - increased rapidly to ~40 mCrab at the end of the week

20 November 2006 --

Week 563 results (2006 November 10 - 16)

  • IC 4329A - possibly detected at ~15 mCrab
  • Cir X-1 - rather weak, i.e., below 13 mCrab for most of the week
  • XTE J1701-462 - still near 330 mCrab
  • X1916-053 - ~15 mCrab
  • EXO2030+375 - rose as high as 75 mCrab and then declined to ~40 mCrab

13 November 2006 --

Week 562 results (2006 November 3 - 9)

  • LMC X-3 - below 10 mCrab
  • HETE J1900.1-2455 - ~25 mCrab
  • EXO2030+375 - may have increased to ~20 mCrab

5 November 2006 --

Week 561 results (2006 October 27 - November 2)

  • XTE J1701-462 - ~280 mCrab
  • EXO2030+375 - appeared to have gotten weaker and then increased to ~13 mCrab

30 October 2006 --

Week 560 results (2006 October 20 - 26)

  • X0512-401 - up to ~23 mCrab
  • X1624-490 - decreased to ~25 mCrab; this is unusual for this source
  • EXO2030+375 - ~13 mCrab

23 October 2006 --

Week 559 results (2006 October 13 - 19)

  • Sigma Gem - flared to ~60 mCrab on one day
  • XTE J1701-462 - still about 260 mCrab
  • EXO2030+375 - down to ~20 mCrab

16 October 2006 --

Week 558 results (2006 October 6 - 12)

  • X1323-619 - ~13 mCrab
  • XTE J1701-462 - roughly 260 mCrab
  • IGR J17098-3626 - ~30 mCrab
  • X1850-087 - ~13 mCrab
  • EXO2030+375 - decreased to ~35 mCrab

6 October 2006 --

Week 557 results (2006 September 29 - October 5)

  • XTE J1701-462 - rose slowly to about 290 mCrab
  • IGR J17098-3626 - ~30 mCrab
  • EXO2030+375 - dropped to ~60 mCrab

3 October 2006 --

Week 556 results (2006 September 22 - 28)

  • XTE J1701-462 - declined slightly to ~240 mCrab
  • SL1744-300 - ~27 mCrab
  • X1850-087 - ~25 mCrab
  • HETE J1900.1-2455 - ~20 mCrab
  • X1916-053 - ~15 mCrab
  • EXO 2030+375 - decreased to ~120 mCrab
  • X2127+119 - ~13 mCrab

25 September 2006 --

Week 555 results (2006 September 15 - 21)

  • XTE J1701-462 - remained near 280 mCrab
  • X1850-087 - increased to 20 to 25 mCrab
  • HETE J1900.1-2455 - remains near 25 mCrab
  • X1916-053 - ~15 mCrab at the end of the week
  • EXO 2030+375 - decreased to ~170 mCrab

15 September 2006 --

Week 554 results (2006 September 8 - 14)

  • X0512-401 - rose to ~20 mCrab
  • X0918-548 - ~15 mCrab
  • XTE J1701-462 - remained steady near 280 mCrab
  • EXO 2030+375 - declined to ~230 mCrab

8 September 2006 --

Week 553 results (2006 September 1 - 7)

  • Cir X-1 - flared briefly to 2 Crab
  • XTE J1701-462 - ~280 mCrab
  • EXO 2030+375 - decreased to ~320 mCrab

1 September 2006 --

Week 552 results (2006 August 25 - 31)

  • XTE J1701-462 - remained near 300 mCrab
  • Swift J1753.5-0127 - ~16 mCrab
  • EXO 2030+375 - dropped to ~375 mCrab

29 August 2006 --

Week 551 results (2006 August 18 - 24)

  • EXO 0748-676 - rose to ~20 mCrab from ~10 mCrab
  • Cir X-1 - was as strong as 1.7 Crab
  • XTE J1701-462 - 260 to 320 mCrab
  • X1704+240 - still ~10 mCrab
  • IGR J17098-3626 - 25 to 50 mCrab with possible evidence of a burst
  • SAX J1712.6-3739 - ~13 mCrab
  • GRS 1758-258 - still 25 to 60 mCrab
  • Aql X-1 - < 13 mCrab
  • EXO 2030+375 - 440 to 480 mCrab

21 August 2006 --

Weeks 549 and 550 results (2006 August 4 - 17)

  • EXO 0748-676 - was as strong as 40 mCrab
  • Cir X-1 - very weak again (below 13 mCrab)
  • XTE J1701-462 - near 260 mCrab
  • X1704+240 - ~9 mCrab
  • IGR J17098-3626 - ~33 mCrab
  • X1724-307 - was as strong as 65 mCrab
  • SL1744-300 - ~25 mCrab
  • GRS 1758-258 - 25 to 60 mCrab
  • HETE J1900.1-2455 - still roughly 25 mCrab
  • Aql X-1 - dropped from ~50 to ~15 mCrab
  • EXO 2030+375 - 470 to 530 mCrab

7 August 2006 --

Week 548 results (2006 July 28 - August 3)

  • X1608-522 - < 13 mCrab
  • XTE J1701-462 - still about 260 mCrab
  • X1724-307 - 25 to 40 mCrab
  • HETE J1900.1-2455 - still ~25 mCrab
  • Aql X-1 - rose to ~40 mCrab near the end of the week (cf. ATel Nos. 869 - 872)
  • EXO 2030+375 - close to 500 mCrab

31 July 2006 --

Week 547 results (2006 July 21 - 27)

  • Mkn 421 - varied in the range 20 to 65 mCrab (relatively few observations were obtained this week)
  • Cir X-1 - varied in the range 210 to 480 mCrab
  • X1608-522 - decreased to below 13 mCrab
  • XTE J1701-462 - still near 300 mCrab
  • EXO 2030+375 - still near 400 mCrab but may be more variable

21 July 2006 --

Week 546 results (2006 July 14 - 20)

  • Mkn 421 - was as strong as ~80 mCrab
  • Cir X-1 - started rising in strength and reached ~230 mCrab
  • X1608-522 - decreased to ~25 mCrab
  • X1657-415 - rose to ~30 mCrab
  • XTE J1701-462 - continued more or less steady near 300 mCrab
  • EXO 2030+375 - rose to ~420 mCrab

17 July 2006 --

Week 545 results (2006 July 7 - 13)

  • GRO J1008-57 - below 13 mCrab
  • Mkn 421 - still strong, averaging ~30 mCrab, but clearly variable
  • Cir X-1 - <15 mCrab
  • X1608-522 - variable in the neighborhood of 60 mCrab
  • XTE J1701-462 - fairly steady near 290 mCrab
  • X1724-307 - roughly 25 to 50 mCrab
  • X1730-333 (Rapid Burster) - declined to < 15 mCrab
  • GRS 1747-312 - possibly was as strong as 60 mCrab for 2 or 3 days
  • Swift J1753.5-0127 - more or less steady near 18 mCrab
  • EXO 2030+375 - rose to ~370 mCrab

7 July 2006 --

Week 544 results (2006 June 30 - July 6)

  • EXO 0748-676 - was up to ~30 mCrab for a few days
  • GRO J1008-57 - may have been up to ~20 mCrab; this is consistent with the time of the previous outburst and a 249 day outburst period
  • Mkn 421 - may have been as strong as 65 mCrab at the end of the week
  • Cir X-1 - <13 mCrab for the entire week (at least in the ASM daily averages)
  • X1608-522 - rose to ~50 mCrab
  • XTE J1701-462 - ~290 mCrab
  • X1724-307 - declined from ~40 to ~20 mCrab
  • X1730-333 (Rapid Burster) - in the range 40 to 80 mCrab
  • GRS 1747-312 - rose to ~30 mCrab
  • EXO 2030+375 - rose to ~330 mCrab

30 June 2006 --

Week 543 results (2006 June 23 - 29)

  • GRO J1008-57 - may be up to 15 mCrab (but this is somewhat uncertain)
  • Mkn 421 - was ~50 mCrab for two days and afterwards was near 30 mCrab
  • Cir X-1 - increased to ~15 mCrab
  • XTE J1701-462 - ~330 mCrab
  • IGR J17098-3626 - ~30 mCrab
  • X1730-333 (Rapid Burster) - still in outburst with daily averages as strong as 130 mCrab
  • Swift J1753.5-0127 - ~20 mCrab
  • XTE J1817-330 - below 13 mCrab
  • HETE J1900.1-2455 - ~20 mCrab
  • EXO 2030+375 - kept rising and hit 250 mCrab at the end of the week

23 June 2006 --

Week 542 results (2006 June 16 - 22)

  • Mkn 421 - ~30 mCrab
  • GX301-2 - the outburst which typically is seen once per orbital cycle was particularly strong with intensities in individual dwells as strong as 500 mCrab
  • Cir X-1 - was again very weak, <13 mCrab, for the entire week
  • XTE 1701-462 - steady near 290 mCrab
  • X1724-307 - ~25 mCrab
  • X1730-333 (Rapid Burster) - an outburst peaked early in the week with peak intensity near 650 mCrab in individual dwells
  • XTE J1817-330 - dropped below 13 mCrab
  • EXO 2030+375 - rose to ~140 mCrab, an historic high for the RXTE era (and rose to ~180 mCrab the first day of week 543)
  • X2206+543 - possibly up to ~13 mCrab

19 June 2006 --

Week 541 results (2006 June 9 - 15)

  • Mkn 421 - roughly 40 mCrab
  • X1630-472 - < 10 mCrab
  • XTE J1701-462 - varied slowly in the range 250 to 400 mCrab
  • X1730-333 (Rapid Burster) - an outburst appears to be starting near the end of the week
  • XTE J1817-330 - ~20 mCrab
  • EXO 2030+375 - ~50 mCrab

12 June 2006 --

Week 540 results (2006 June 2 - 8)

  • Mkn 421 - daily averages range from 10 to 40 mCrab
  • Cir X-1 - rose to ~120 mCrab
  • XTE J1701-462 - ~330 mCrab
  • XTE J1817-330 - down to ~20 mCrab
  • HETE J1900.1-2455 - ~20 mCrab
  • EXO 2030+375 - ~15 mCrab at phases in its 46 d cycle in which it is usually much weaker

2 June 2006 --

Week 539 results (2006 May 26 - June 1)

  • Mkn 421 - 15 to 45 mCrab
  • X1246-588 - flared (or produced a strong burst) to ~2 Crab for a short time (~100 s) early in the week
  • Cir X-1 - remained < 20 mCrab
  • XTE J1701-462 - 260 to 320 mCrab
  • XTE J1817-330 - declined to roughly 25 mCrab

30 May 2006 --

Week 538 results (2006 May 19 - 25)

  • Mkn 421 - strength varied from 50 to 100 mCrab and possibly stronger
  • Cir X-1 - below 20 mCrab and possibly below 10 mCrab for another week
  • X1630-472 - decreased to ~13 mCrab or less
  • XTE J1701-462 - down to ~300 mCrab
  • X1724-307 - may be up to ~40 mCrab
  • SAX J1747.0-2853 - possibly ~50 mCrab
  • XTE J1817-330 - ~40 mCrab
  • Cyg X-1 - low (~240 mCrab) and hard

19 May 2006 --

Weeks 536-537 results (2006 May 5 - 18)

  • Mkn 421 - in the range 25 to 50 mCrab
  • X1323-619 - may have increased to ~15 mCrab
  • Cir X-1 - < 13 mCrab for over 20 days (also see ATels 811, 812)
  • X1630-472 - down to ~15 mCrab
  • XTE J1701-462 - increased to ~400 mCrab
  • XTE J1817-330 - down to ~50 mCrab
  • HETE J1900.1-2455 - ~20 mCrab
  • X2127+119 - was as strong as 25 mCrab for nearly a week

8 May 2006 --

Week 535 results (2006 April 28 - May 4)

  • Cir X-1 - < 13 mCrab for 9 days
  • X1630-472 - ~35 mCrab
  • XTE J1701-462 - declined to ~310 mCrab
  • IGR J17098-3626 - ~25 mCrab
  • XTE J1817-330 - declined to ~65 mCrab
  • HETE J1900.1-2455 - ~25 mCrab

2 May 2006 --

Week 534 results (2006 April 21 - 27)

  • Mkn 421 - up to ~25 mCrab
  • Cir X-1 - ~200 mCrab
  • Swift J1626.6-5156 - < 13 mCrab
  • X1630-472 - declined from ~50 to ~25 mCrab
  • XTE J1701-462 - ~400 mCrab
  • GX339-4 - may be near 25 mCrab
  • IGR J17098-3626 - ~25 mCrab
  • Swift J1753.5-0127 - ~16 mCrab
  • XTE J1817-330 - ~130 mCrab

26 April 2006 --

Week 533 results (2006 April 14 - 20)

  • XTE J1701-462 - ~400 mCrab
  • X1702-429 - ~40 mCrab
  • XTE J1817-330 - fairly steady near 130 mCrab
  • HETE J1900.1-2455 - ~40 mCrab
  • Cyg X-1 - up to 600 to 900 mCrab with some spectral softening

18 April 2006 --

Week 532 results (2006 April 7 - 13)

  • X1630-472 - ~65 mCrab as it continued to decline smoothly
  • XTE J1701-462 - remained near 330 mCrab
  • X1702-429 - ~80 mCrab
  • XTE J1817-330 - down to ~90 mCrab (based on few observations)
  • Cyg X-1 - activity subsided somewhat and hardness ratios increased

18 April 2006 --

Week 531 results (2006 March 31 - April 6)

  • Cir X-1 - ~130 mCrab
  • X1630-472 - down to ~70 mCrab
  • Cyg X-1 - daily averages are 0.7 to 0.8 Crab, and the hardness ratios show that the spectrum is softening

3 April 2006 --

Week 530 results (2006 March 24 - 30)

  • X1630-472 - decreased smoothly to ~80 mCrab
  • X1636-536 - increased sharply to ~210 mCrab
  • XTE J1701-462 - remained near 330 mCrab
  • GX 339-4 - still ~25 mCrab
  • XTE J1817-330 - remained near 240 mCrab
  • Cyg X-1 - had flares which reach to 1 Crab and above

28 March 2006 --

Week 529 results (2006 March 17 - 23)

  • X1630-472 - ~110 mCrab
  • XTE J1701-462 - declined smoothly to ~330 mCrab
  • GX 339-4 - ~20 mCrab
  • IGR J17098-3626 - ~50 mCrab
  • X1724-307 - ~25 mCrab
  • XTE J1817-330 - decayed smoothly to ~230 mCrab
  • GS 1843+009 - has not been seen to exceed 25 mCrab in the last 50 days (cf. ATel No. 769)
  • HETE J1900.1-2455 - ~20 mCrab
  • Cyg X-1 - got a bit stronger, as strong as 650 mCrab, and a bit softer

20 March 2006 --

Week 528 results (2006 March 10 - 16)

  • Cir X-1 - was as strong as ~250 mCrab
  • XTE J1701-462 - 400 to 500 mCrab
  • GX 339-4 - may be ~20 mCrab
  • IGR J17098-3626 - 50 to 80 mCrab
  • X1724-307 - ~20 mCrab
  • XTE J1817-330 - declined to ~260 mCrab
  • HETE J1900.1-2455 - still ~25 mCrab

13 March 2006 --

Week 527 results (2006 March 3 - 9)

  • X1630-472 - ~130 mCrab
  • XTE J1701-462 - ~400 mCrab
  • IGR J17098-3626 - ~70 mCrab
  • X1724-307 - may be just above 25 mCrab
  • RS Oph - <13 mCrab
  • XTE J1817-330 - decreased to ~350 mCrab

3 March 2006 --

Week 526 results (2006 February 24 - March 2)

  • X1630-472 - ~130 mCrab
  • XTE J1701-462 - roughly 500 mCrab
  • RS Oph - declined from ~15 mCrab to < 13 mCrab
  • XTE J1817-330 - decreased from ~660 mCrab to ~330 mCrab

24 February 2006 --

Week 525 results (2006 February 17 - 23)

  • RS Oph - increased to ~50 mCrab at the end of last week and beginning of this week (see ATel nos. 737, 741, 747)
  • Mkn 501 - may have increased to ~10 mCrab
  • XTE J1701-462 - ~570 mCrab for the last half of the week
  • X1728-34 (GX354-0) - possibly up to ~250 mCrab
  • XTE J1817-330 - ~670 mCrab

21 February 2006 --

Week 524 results (2006 February 10 - 16)

  • EXO 0748-676 - < 13 mCrab
  • X1246-588 - ~ 13 mCrab
  • XTE J1701-462 - the few measurements are in the vicinity of 500 mCrab
  • Swift J1753.5-0127 - 20 to 25 mCrab
  • Cyg X-3 - still roughly 300 mCrab in the daily averages

13 February 2006 --

Week 523 results (2006 February 3 - 9)

  • XTE J1701-462 - intensities from individual dwells range from 0.3 to 1.0 Crab
  • IGR J17098-3626 - roughly 50 mCrab
  • XTE J1817-330 - declined to ~1.3 Crab

6 February 2006 --

Week 522 results (2006 January 27 - February 2)

  • EXO 0748-676 - ~25 mCrab
  • X1630-472 - ~250 mCrab
  • XTE J1701-462 - increased from 0.5 to 1.0 Crab
  • IGR J17098-3626 - roughly 40 mCrab
  • XTE J1817-330 - ~1.7 Crab
  • X1901+031 - may have risen to ~20 mCrab
  • Cyg X-3 - daily average intensities are ~280 mCrab

30 January 2006 --

Week 521 results (2006 January 20 - 26)

  • Mkn 421 - ~25 mCrab
  • Cir X-1 - up to ~100 mCrab
  • XTE J1701-462 - in the range 0.6 to 1 Crab
  • X1724-307 - down to < 25 mCrab
  • X1730-333 (Rapid Burster) - results still suggest that an outburst is in progress
  • XTE J1817-330 - a new source just found w/ the ASM at the end of the week as it rose to ~1 Crab (see ATel no. 714)
  • Cyg X-3 - daily averages in the range 250 to 500 mCrab

23 January 2006 --

Week 520 results (2006 January 13 - 19)

  • Cir X-1 - < 30 mCrab (based on a small number of observations)
  • X1630-472 - roughly 250 mCrab (also based on a small number of observations)
  • XTE J1701-462 - as high as ~500 mCrab in a daily average (see ATel 696 plus others; the full ASM light curve is not available yet)
  • X1724-307 - roughly 130 mCrab
  • X1730-333 (Rapid Burster) - is possibly in outburst
  • Cyg X-3 - rose to ~430 mCrab and HR 2 declined markedly

17 January 2006 --

Weeks 518-519 results (2005 December 30 - 2006 January 12)

  • Mkn 421 - in the range 20 to 50 mCrab
  • Cyg X-3 - increased to ~260 mCrab and the spectrum became noticeably softer, i.e., HR2 declined

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