MTA Monitoring Report 01/09/15 - 01/15/15

Archive of all weekly reports
Archive of monthly reports

ACIS DPA-A was unexpectedly powered-off by a single event upset at 2015:12:00:43:55.3 during OBSID 52186.
Engineering assessment indicated behavior consistent with prior cases where the DPA powered-down.
Scheduled observing resumed at 12:51am EST on Jan 13.
Lost science time: 99.0ks
(Note gap in focal plane temperature below.)

Radiation

Quiet.

Detrended CTI

Although we prefer to quote CTI values of the cleanest data (FT <= -119.7 C, int time > 7000sec), the data that fulfills these conditions are getting rare. We now quote CTI based on temperature corrected data for focal plane temperature <= -118.5 C).

Average of ACIS-I CCDs (MnKa) slope: 1.636e-6 CTI/year (4.482e-9 CTI/day)
Detrended slope: 1.521e-6 CTI/year (4.167e-9 CTI/day)

ACIS Warm Pixels

We display all bad pixels that have showed up in past, and, if any, previously unknown bad pixels appeared in the last 14 days. We also list hot pixels (defined as 1000 above the average of bias background). Warm columns 509-514 are probably due to boundaries.

New definitions of warm pixels and flickering pixels (May 15, 2014). If a pixel displays the level beyond a threshold for more than 70% of the time in the past two weeks, the pixel is categorized as a "warm" pixel. If a pixel is above the threshold more than 30% of time but less than 70% of the time in the past two weeks, the pixel is categorized as a "flickering" pixel.

 CCD0CCD1CCD2CCD3CCD4CCD5CCD6CCD7CCD8CCD9
Previously Unknown Bad Pixels                    
Current Warm Pixels     (726,537) (21,95)       (335,412)    
Flickering Warm Pixels (692,141) (153,205) (427,125) (910,239) (802,665) (526,66) (703,739) (811,637)   (669,577) (607,281) (357,303) (369,376) (263,317) (161,206) (341,427)     (833,325) (737,382) (182,474) (197,241) (356,902) (881,53) (139,109)  
Current Hot Pixels                    
Flickering Hot Pixels                    
Warm column candidates         884 510 512 1022   512 1022    
Flickering Warm Column Candidates                    

ACIS Focal Plane Temperature

For this period, 5 peaks are observed.

Weekly focal plane temperature with sun angle and altitude overplotted. Sun angle is the solar array angle, that is the angle between the sun and the optical axis (+X axis). Altitude varies from 11 kkm to 137 kkm.



Telemetry

New violations or new extrema are shown in blue cells.

MSID 01/09/15 01/10/15 01/11/15 01/12/15 01/13/15 01/14/15 01/15/15 yellow limits
(lower)
upper 		red limits
(lower)
upper 		Units Description
1DPICACU     (0.00) (0.00) (0.42)     (0.60)
1.75		(-999)
999		 AMP DPA INPUT CURRENT A
1DPP0AVO     (0.00) (0.00)       (5.02)
5.54		(4.75)
5.75		 V DPA +5V ANALOG A
RSRFALV 185.00 185.00 185.00 185.00 185.00 185.00 185.00 (172.0)
174.0		(171.0)
175.0		 V Range switch setting (2RSRFALV)
OHRTHR27 297.33 297.33 297.34 297.34 297.33 297.33 297.34 (295.48)
297.15		(279.37)
307.15		 K RT 20 : PERISCOPE
OHRTHR42 294.59 294.61 294.66 294.63 294.57 294.56 294.64 (292.15)
294.37		(279.37)
307.15		 K RT 133: PERISCOPE
OHRTHR43 294.45 294.56 294.67 294.62 294.48 294.45 294.64 (291.59)
293.26		(279.37)
307.15		 K RT 134: PERISCOPE


IRUs

Recent Observations

OBSID DETECTOR GRATING TARGET ANALYSIS ACA
16478 ACIS-235678 NONE Pictor A Jet OK OK
17084 ACIS-5678 NONE HATLASJ090740.0-004200 OK OK
17574 ACIS-235678 NONE Pictor A Jet OK OK
17145 ACIS-01236 NONE Cygnus A - Filament OK OK
17442 ACIS-456789 HETG tau CMa OK OK
17460 ACIS-0123 NONE RCW103 OK OK
17497 ACIS-012367 NONE Abell 3411 OK OK
16148 ACIS-01236 NONE A667 OK OK

Trending

This week's focus is ACIS.

Last reported on Oct 16 (2014).

Only the most interesting or representative msids are shown below. For a full listing choose the bulletted link.

Min/max envelopes in dark blue appear on the trending plots. The envelopes are 4th degree fits to the monthly minimum and maximum values for each MSID. The final polynomial form and binning are still being experimented with. We will soon add to the trending pages a report of the fits and predictions they give on future limit violations. The light blue curve is our original smoothing of all the data over 30 day moving boxcars. The green/yellow line is a linear fit to all the data; the break occurs at a limit change.




If you have any questions, please contact: swolk@head.cfa.harvard.edu