1 Crab = 74 SSC cts/sec
This is the 1998 archive.
31 December, 1998
--
- XTE J0111.2-7317 - remains at ~25 mCrab
- Cen X-3 - back up to ~250 mCrab
- XTE J1550-564 - rising again, up to ~2 Crab
- GRS 1915+105 - declined to ~150 mCrab and is back up to ~550 mCrab
- Cyg X-1 - shows a gradual rising trend w/ flares, range is 0.3 to 0.6 Crab
- XTE J1946+274 - ~12 mCrab
18 December, 1998
--
- XTE J0111.2-7317 - ~40 mCrab
- X 0614+091 - varying in the range 25 to 100 mCrab
- Mkn 421 - ~13 mCrab
8 December, 1998
--
- XTE J1550-564 - still around 100 mCrab, based on very few observations
- GRS 1915+105 - steady at ~0.5 Crab
- XTE J1946+274 - ~10 mCrab
Note: The sun continues to interfere w/ observations of sources toward
the Galactic Center.
2 December, 1998
--
- XTE J1550-564 - still declining slowly; ~100 mCrab
- GX 339-4 - also declining slowly; ~150 mCrab
- 3A 1942+274 - steady at ~15 mCrab
- XTE 2012+381 - down to < 10 mCrab
- E 2259+586 - could be a bit stronger than usual at 15 - 30 mCrab
Note: Solar interference in the galactic center region has been and
will be significant for another month or two.
25 November, 1998
--
- XTE J1550-564 - relatively steady at ~0.25 Crab
- GX 339-4 - a small decline to ~160 mCrab
- XTE J1946+274 - rose slightly to ~20 mCrab
- E 2259+586 - may be somewhat stronger than usual at ~20 mCrab
16 November, 1998
--
- XTE J0111.2-7317 - ~25 mCrab (a new pulsar discovered recently with
the PCA,; see the IAU Circulars for details)
- Cir X-1 - flaring up to ~3.7 Crab
- XTE J1550-564 - down to ~0.3 Crab
- XTE J1946+274 - down to ~13 mCrab
10 November, 1998
--
- XTE J1550-564 - down to ~0.4 Crab at the end of the week
- 4U 1705-44 - ended week at < 15 mCrab
- X1711-339 - continues along at ~40 mCrab
- XTE J1946+274 - down to ~23 mCrab
2 November, 1998
--
- XTE J1550-564 - down to ~0.9 Crab
- GX 339-4 - down to ~200 mCrab
- 4U 1705-44 - down to ~50 mCrab
- RX J17095-266 - showed an episode with an intensity of ~60 mCrab
- GX 1+4 - looked very weak, < 10 mCrab
- KS 1731-260 - back above 100 mCrab
- NGC 6441 (source in this globular cluster) - very strong, ~50 mCrab
- XTE J1946+274 - down to ~25 mCrab
- Cyg X-3 - A new period of activity may be beginning - up to ~140 mCrab
28 October, 1998
--
- XTE J1550-564 - ~1.6 Crab
- GX 339-4 - ~220 mCrab; shows a very slight weakening trend
- 4U 1705-44 - down to ~100 mCrab
- NGC 6441 - ~40 mCrab
- GRS 1915+105 - ~460 mCrab
- XTE J2012+381 - ~25 mCrab
- XTE J1946+274 - down to ~40 mCrab
19 October, 1998
--
- XTE J1550-564 - ~1.3 Crab
- 4U 1705-44 - down to ~130 mCrab
- KS 1731-260 - varying around 60 mCrab
- GRS 1915+105 - ~300 mCrab
- XTE J1946+274 - stable at ~45 mCrab
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
--
- LMC X-3 - <13 mCrab, relatively weak
- Cen X-3 - ~25 mCrab
- XTE J1550-564 - ~1.6 Crab, based on rather sparse coverage
- XTE J1946+274 = GRO J1944+26 = 3A 1942+274 - appears to be declining and may have gone as low as 50 mCrab
- XTE J2012+381 - appears to remain at ~13 mCrab
5 October, 1998
--
- LMC X-3 - decreased to ~7 mCrab
XTE J1550-564 - ~1.5 Crab (see note below)
4U 1705-44 - appears to be decreasing and could be below 200 mCrab
KS 1731-260 - decreasing trend continues, was ~20 mCrab at week's end
GRS 1915+105 - was rather steady at ~360 mCrab
XTE J1946+274 = GRO J1944+26 = 3A 1942+274 - still ~80 mCrab
Note: For unclear reasons, the coverage of the galactic plane (11 - 17
h) was very sparse this week.
1 October, 1998
--
- Cen X-3 - intensity outside of eclipse is drpping once again, < 130 mCrab and mostly < 60 mCrab
- Cir X-1 - most prominent set of absorption dips seen by ASM occurred just after radio phase zero this week
- XTE J1550-564 - flared to 6.4 Crab early in the week, then decreased to ~1.6 Crab
- X1608-52 - ~65 mCrab
- KS 1731-260 - ~100 mCrab or less; the intensity may be dropping
- GRS 1915+105 - 270 to 400 mCrab
- XTE J1946+274 = GRO J1944+26 = 3A 1942+274 - up to ~80 mCrab
23 September, 1998
--
- XTE J1550-564 - rose to ~2.5 Crab (and in week 138 was at > 6 Crab for ~ 1 day; see the IAU Circulars for details)
- X1608-522 - 3 observations (1 dwell each) at ~0.5 Crab indicate
possible bursting behavior (persistent emission is at ~60 mCrab)
- X1730-333 (Rapid Burster) - <10 mCrab at the end of the week
- XTE J1946=274 = GRO J1944+26 = (most likely) 3A 1942+274 - rose to ~70 mCrab
- XTE J2012+381 - ~10 mCrab
17 September, 1998
--
- XTE J1550-564 - climbs to 2 Crabs (reaching this level in week 137)
- x1608-52 - ~40 or 50 mCrab; the results suggest that one strong burst was detected early in the week.
- x1730-333 (Rapid Burster) - decreased to <20 mCrab
- GRS 1915+105 - ~450 mCrab for the last half of the week; flaring was only apparent early in the week.
- XTE J2012+381 - ~15 mCrab
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
--
- x1608-52 - ~30 mCrab
- x1711-339 - ~40 mCrab
- x1730-333 (Rapid Burster) - down to ~50 mCrab at week's end
- NGC 6440 - <10 mCrab at week's end
- SGR 1900+14 - <10 mCrab (persistent emission only)
- GRS 1915+105 - 0.5 to 1.1 Crab (flaring to the higher intensity later
in the week)
- XTE J2012+381 - decreased to ~10 mCrab
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
--
- x1711-339 - ~40 mCrab
- GX 1+4 - ~40 mCrab
- x1730-333 (Rapid Burster) - outburst is decaying as expected, but not
very smoothly
- SGR 1900+14 - a short, non-burst like increase to ~60 mCrab was seen
at the end of the week (See the IAU Circulars for more on the activity
of this source)
- GRS 1915+105 - at the beginning of the week was in the range 0.7 to 1
Crab, while for the latter half of the week was near 0.5 Crab
- x1953+319 - relatively low strength, < 10 mCrab
- Cyg X-1 - relatively inactive at ~0.3 Crab
- XTE J2012+381 - linear decline continued to ~15 mCrab
- Cyg X-3 - moderate strength and activity (daily averages ~100 mCrab)
25 August, 1998
--
- 4U 1705-44 - remains strong at 320 to 400 mCrab
- x1711-339 - remains at 25 to 50 mCrab
- x1730-333 (Rapid Burster) - another outburst has begun with a peak intensity of ~600 mCrab on about MJD 51043 (= 1998 August 18)
- Cyg X-1 - mostly steady at ~0.33 Crab
- XTE J2012+381 - linear decay continued down to ~25 mCrab
- Cyg X-3 - returned to a level of ~150 mCrab (daily average)
- XTE J2123-058 - <10 mCrab
18 August, 1998
--
- 4U 1705-44 - peaked at ~390 mCrab and then decreased to ~320 mCrab
- x1711-339 - in range 25 - 50 mCrab, based on noisy results
- GX 1+4 - appears to be ~30 mCrab
- XTE J1748-288 - <20 mCrab
- GRS 1915+105 - in range 0.6 to 0.85 Crab with a slight downward trend
- Cyg X-1 - flaring from ~260 mCrab to ~600 mCrab
- XTE J2012+381 - down to ~30 mCrab
- Cyg X-3 - increased in strength and activity, ~240 mCrab (daily averages)
- XTE J2123-058 - <15 mCrab
12 August, 1998
--
- LMC X-3 - up to ~25 mCrab
- 4U 1705-44 - as high as ~250 mCrab in daily averages
- x1711-339 - ~35 mCrab
- XTE J1748-288 - down to < ~15 mCrab
- GRS 1915+105 - minor activity in 0.7 to 1.0 Crab range
- Cyg X-1 - down to ~0.3 Crab with less flaring activity
- XTE J2012+381 - down to ~50 mCrab
- XTE J2123-058 - down to ~20 mCrab
5 August, 1998
--
- 4U 1705-44 - up to ~230 mCrab
- x1711-339 - up to 25 to 50 mCrab (new outburst!)
- GX 1+4 - up to ~25 mCrab
- XTE J1748-288 - steady at ~25 mCrab
- GRS 1915+105 - active in the range 0.5 to 1.6 Crab
- Cyg X-1 - active in the range 0.4 to 1 Crab
- XTE J2012+381 - declined slowly to ~65 mCrab
- Cyg X-3 - gradually increasing to ~160 mCrab
- XTE J2123-058 - slowly decreasing to ~25 mCrab
23 July, 1998
--
- x1608-522 - gradually increased to ~50 mCrab
- x1702-429 - up to 65 to 100 mCrab
- x1705-44 - up to ~80 mCrab
- XTE J1748-288 - down to ~25 mCrab
- GRS 1915+105 - flaring in the range 0.5 to 1.6 Crab
- Cyg X-1 - flaring in the range 0.4 to 1.8 Crab
- XTE J2012+381 - declined to ~80 mCrab
- Cyg X-3 - daily averages were steady at ~130 mCrab
- XTE J2123-058 - steady at 40 to 50 mCrab
23 July, 1998
--
- 4U 1705-44 - rose from ~10 to ~40 mCrab
- XTE J1748-288 - down to about 50 mCrab
- GRS 1915+105 - both minor flaring to just above 1 Crab and some steady emission at ~0.5 Crab
- Cyg X-1 - flaring up to ~1 Crab from a base 0f ~0.5 Crab
- XTE J2012+381 - down to ~100 mCrab
- Cyg X-3 - relatively steady at ~100 mCrab
- XTE J2123-058 - 40 to 50 mCrab
6 July, 1998
--
- 4U 1705-44 - < 10 mCrab at the end of the week
- XTE J1748-288 - down to ~100 mCrab
- GRS 1915+105 - base level is at ~0.5 Crab w/ excursions as high as 1.6 Crab
- Cyg X-1 - activity level is increasing with brief episodes as high as 0.7 Crab
- XTE J2012+381 - steady or very slowly declining at ~130 mCrab
- Cyg X-3 - intensity and activity level are increasing with peak intensity (1 day average) this week of ~190 mCrab
- XTE J2123-058 - down to ~40 mCrab
6 July, 1998
--
- Cen X-3 - 200 to 330 mCrab
- GX 339-4 - remains at ~280 mCrab
- XTE J1748-288 - down to ~160 mCrab
- GRS 1915+105 - mostly steady at ~470 mCrab with one flare to 1.6 Crab
- XTE J2012+381 - ~140 mCrab
- Cyg X-3 - up to ~130 mCrab, may be getting more active (has recently been ~80 mCrab)
- XTE J2123-058 - peaked at ~80 mCrab, down to ~50 mCrab at the end of the week (note that this source was discovered early in the week)
2 July, 1998
--
- Cen X-3 - as high as 0.33 Crab
- XTE J1748-288 - down to ~260 mCrab
- x1803-245 - <15 mCrab, consistent with no detection
- XTE J2012+381 - back up to ~160 mCrab
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
--
- Cen X-3 - ~200 mCrab for the last few days of the week
- XTE J1748-288 - in the range 0.4 to 0.6 Crab
- x1803-245 - declined to <15 mCrab
- GRS 1915+105 - ~0.6 Crab and rather steady
- XTE J2012+381 - rose slightly from ~100 to ~120 mCrab
17 June, 1998
--
- LMC X-3 - < 10 mCrab; remains very low
- Cen X-3 - up to ~270 mCrab
- x1630-472 - < 15 mCrab
- x1705-44 - 80 to 130 mCrab
- XTE J1748-288 - 400 to 480 mCrab
- x1803-245 - down to ~60 mCrab; decline has been linear for just over a month
- GRS 1915+105 - steady at ~500 mCrab
- XTE J2012+381 - down to ~120 mCrab
9 June, 1998
--
- LMC X-3 - < 10 mCrab currently
- Mkn 421 - rose to ~30 mCrab
- Cen X-3 - up to ~ 180 mCrab having emerged from a long time period at a low level
- Cir X-1 - the light curve shows a rise towards an unusual late 16.6 d phase flare
- x1705-44 - up to ~100 mCrab
- XTE J1716-389 - has declined to <10 mCrab from ~30 mCrab level seen most often
- XTE J1748-288 - This new source was found on Thursday, June 4 at an intensity ~300 mCrab.
- x1803-245 - down to ~160 mCrab
- GRS 1915+105 - mostly ~0.5 Crab with one short flare to ~2.7 Crab
- XTE J2012+381 - has peaked at ~210 mCrab and declined slightly to ~190 mCrab
1 June, 1998
--
- LMC X-3 - below ~10 mCrab (down from ~25 mCrab which has persisted for more than 2 months)
- x1630-47 - ~15 mCrab
- GX 339-4 - steady at ~270 mCrab
- x1705-44 - rising again, may be higher than ~80 mCrab
- x1803-245 - down to ~260 mCrab
- GRS 1915+105 - steady at ~450 mCrab
- XTE J2012+381 - up to ~160 mCrab (a newly discovered transient!)
26 May, 1998
--
- x1608-522 - ~40 or 50 mCrab
- x1630-47 - down to < 20 mCrab at end of week
- GX 339-4 - up to ~260 mCrab
- x1705-44 - back to below ~25 mCrab
- x1803-245 - down to ~0.33 Crab
- GRS 1915+105 - down to ~440 mCrab (and rather steady on time scales ~1 d)
19 May, 1998
--
- x1608-522 - ~20 to ~40 mCrab
- x1630-47 - ~40 mCrab
- x1657-415 - up to ~50 mCrab (shows strong modulation at the orbital period)
- GX 339-4 - down to ~210 mCrab
- x1803-245 - ~0.4 Crab
- Aql X-1 - < 15 mCrab
- GRS 1915+105 - ~0.5 Crab (rather steady)
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.
- x1608-522 - < ~25 mCrab
- x1630-47 - ~80 down to ~50 mCrab
- GX 339-4 - ~260 mCrab
- x1705-44 - ~25 mCrab
- x1803-245 - up to ~600 mCrab (with a suggestion of X-ray bursts or flares)
- SAX J1808.4-3658 - < 25 mCrab
- Aql X-1 - < 15 mCrab at the end of the week
- GRS 1915+105 - ~0.5 Crab (relatively steady)
5 May, 1998
--
- x1608-522 - <= ~25 mCrab
- x1630-47 - ~50 mCrab and rather steady
- x1705-44 - down to ~10 mCrab
- x1803-245 - up to ~0.7 Crab (based on relatively few measurements)
- SAX J1808.4-3658 - down to ~< 10 mCrab
- Aql X-1 - down to ~25 mCrab
- GRS 1915+105 - steady at ~0.5 Crab for most of the week, but with an
increase at week's end possibly indicating an episode of strong
variability
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
--
- x1608-522 - ~30 mCrab
- x1630-47 - ~40 mCrab (relatively steady)
- GX 339-4 - showed a brief rise to ~290 mCrab and then declined to 240 mCrab
- x1705-44 - down to ~15 mCrab and then shows weak evidence for an increase to ~40 mCrab
- ngc6440 - consistent w/ <10 mCrab
- x1803-245 - up to 130 mCrab (a new outburst!) - note that PCA data from 4/27/98 confirms a continued increase in week 117
- sax j1808.4-3658 - down to ~25 mCrab
- Aql X-1 - down sharply to ~100 mCrab
- GRS 1915+105 - strong and variable at beginning of week - steady at
~0.65 Crab at week's end
23 April, 1998
--
- XTE J0421+560 - < 10 mCrab
- x1608-522 - from ~60 mCrab down to ~10 mCrab
- Sco X-1 - "baseline" is now at a relatively high level of 12 to 15 Crab
- x1630-47 - steady at ~40 mCrab
- x1657-415 - shows 10 d orbital modualtion nicely w/ peak flux ~40 mCrab
- x1705-44 - ~90 down to ~25 mCrab
- ngc6440 (source is in this globular cluster) - a hint of activity at ~20 mCrab
- sax j1808.4-3658 - ~50 mCrab
- Aql X-1 - down from 400 mCrab to 270 mCrab
- GRS 1915+105 - steady at ~0.5 Crab at the beginning of the week, but shows dramatic flaring to 3.5 Crab later in the week
14 April, 1998
--
- XTE J0421+560 - down to <10 mCrab
- x1608-522 - rebounded to 60 to 70 mCrab
- x1630-47 - ~40 mCrab
- x1705-44 - steady at ~100 mCrab
- Aql X-1 - down slightly to 370-400 mCrab
- GRS 1915+105 - 0.6 to 1.0 Crab
6 April, 1998
--
- xtej0421+560 - This new transient peaked at ~2 Crab and then went down rapidly (at ~60 mCrab at the end of the week)
- x1608-522 - down to <30 mCrab at week's end
- x1630-47 - down to ~40 mCrab
- x1705-44 - remains at ~100 mCrab
- Aql X-1 - still at ~440 mCrab
- GRS 1915+105 - 0.3 to 3.0 Crab
3 April, 1998
--
- x1608-52 - decreased from ~240 mCrab to ~130 mCrab
- x1630-47 - down to ~40 mCrab
- GX 339-4 - steady at 280 mCrab
- x1705-44 - ~100 mCrab
- Aql X-1 - steady at ~440 mCrab
- GRS 1915+105 - 400 to 670 mCrab
Advance notice:
A new transient, XTE J0421+56 has been discovered in week 113.
27 March, 1998
--
- x1608-52 - decreased from 400 mCrab to 270 mCrab
- x1630-47 - down to ~100 mCrab
- GX 339-4 - steady at ~280 mCrab
- 4U 1705-44 - back up to 60 mCrab
- Aql X-1 - steady at ~400 mCrab
- GRS 1915+105 - 0.4 to 2.0 Crab
18 March, 1998
--
- X1608-522 - ~470 mCrab (steady, but the coverage is sparse)
- X1630-47 - ~160 mCrab (down somewhat)
- GX 339-4 - ~270 mCrab (down slightly from the peak)
- x1705-44 - < 25 mCrab
- Aql X-1 - up to ~440 mCrab (at peak)
- GRS 1915+105 - 0.3 to 0.6 Crab (but increases to above 1 Crab again in
week 111)
11 March, 1998
--
- x0614+091 - 40 to 90 mCrab
- Cen X-3 - 0 to 270 mCrab
- x1608-522 - ~470 mCrab
- x1630-47 - ~230 mCrab
- GX339-4 - still about 300 mCrab
- x1705-44 - down to 40 mCrab
- XTE J1858+034 - below 10 mCrab (outburst is over)
- Aql X-1 - rose to ~210 mCrab (and keeps rising for at least the first
half of week 110)
4 March, 1998
--
- x0614+091 - 40 mCrab to 120 mCrab back to 40 mCrab
- Mkn 421 - 25 mCrab to < 10 mCrab
- Cen X-3 - ~40 mCrab average with at least one flare to ~180 mCrab (i.e., is becoming active once again)
- x1608-52 - ~470 mCrab
- x1630-47 - to 460 mCrab and then down to 240 mCrab
- GX 339-4 - still ~300 mCrab
- 4U 1705-44 - down to ~40 mCrab
- X 1730-333 (Rapid Burster) - below 25 mCrab
- XTE J1858+034 - < 15 mCrab
- GRS 1915+105 - 260 to 930 mCrab (and does not look as chaotic as it often does)
- x1957+115 - ~45 mCrab
- Aql X-1 began another outburst as week 108 ended and week 109 started.
The new outburst is not apparent in the week 108 light curve, but the
outburst is strong in week 109 (up to 120 mCrab).
20 February, 1998
--
- Mkn 421 - up to ~25 mCrab
- X1354-644 - <13 mCrab (back to quiescence)
- x1608-52 - decreased from 0.9 Crab to 0.6 Crab
- X1630-47 - up to ~230 mCrab (beginning of outburst)
- GX 339-4 - up to ~280 mCrab (brighter than ever for ASM)
- X1705-44 - down to ~150 mCrab
- x1730-333 (Rapid Burster) - ~80 mCrab
- GRS 1915+105 - 0.4 Crab (relatively weak and steady; perhaps another
appearance of the low hard state)
- x1953+319 - ~25 mCrab
- x1957+115 - up to ~50 mCrab (relatively high but not unprecedented)
10 February, 1998
--
- x1608-522 is near maximum (0.9 Crab);
- rapid burster (x1730-333) in slow decline phase (115 mCrab at week's end);
- x1630-472 is still rising (40 mCrab in week 105, rising to 100 mCrab
in week 106 realtime data);
- gx339-4 still bright at 250 mCrab;
- grs1915+105 entering a low-hard state (0.4 Crab);
- coronal flare in HR1099 (avg to 37 mCrab on Feb. 2);
- bright emission from Mkn 421 (to 25 mCrab).
5 February, 1998
--
- x1354-644 - ~20 mCrab
- GX 339-4 - ~200 mCrab
- X1730-333 (Rapid Burster) - ~200 mCrab at the end of the week
- GRS 1915+105 - 0.7 - 1.7 Crab (getting weaker)
- Cyg X-3 - ~300 mCrab (still high)
Advance notice re next week:
X1730-333 (Rapid Burster), X1608-522, x1630-47 are all in outburst.
21 January, 1998
--
- X 1354-644 - ~20 mCrab
- GX 339-4 - ~200 mCrab
- HD154791 - consistent w/ no detected flux
- X 1953+319 - down from ~70 mCrab to ~25 mCrab
- Cyg X-3 - reached a peak of ~300 mCrab early in the week, and then
declined to ~130 mCrab (intesities are 1 d averages)
14 January, 1998
--
- 1es0347-121 - This source showed emission at the 20 mCrab level around
MJD 50760 and 50805 (both in previous weeks).
- X1354-644 - ~20 mCrab
- GX 339-4 - up to ~210 mCrab, VERY STRONG!
- HD 154791 - < 10 mCrab
- XTE J1755-324 - < 15 mCrab
- GRS 1915+105 - 0.3 to 2.8 Crab with much variability
- X 1953+319 - increased to ~75 mCrab, VERY STRONG
- Both GX 339-4 and X1953+319 are much stronger than in previous
observations with the ASM.
8 January, 1998
--
- X0614+091 - ~80 mCrab, quite active
- x1354-644 - ~25 mCrab
- GX 339-4 - ~100 mCrab, quite strong
- XTE J1755-324 - < 20 mCrab, i.e., not detected
- GRS 1915+105 - 0.3 to 2.8 Crab, wild as usual
2 January, 1998
--
- x0614+091 - 13 to 40 mCrab (1 day averages) This is somewhat weaker
than for the last month or two.
- x1354-644 - 20 to 30 mCrab (based on rather noisy 1 day averages)
- GX 339-4 - ~80 mCrab (also based on rather noisy 1 day averages)
- GRS 1915+105 - 1 to 2.5 Crab; Highly variable in this intensity range,
but similar to the last few weeks.
- Cyg X-1 - 270 -> 200 mCrab; The latter value, which pertains to the
week's end, is rather low for this source.
- Cyg X-2 - ~1 Crab; This is a high, but not unprecedented level.
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