ASTROSAT CZTI

Data Quality Report

Orbit 35925

Creation date: 2022-06-09T02:11:48.216257
Switch to: Orbit-wise | Merged OBSID-wise
web.py, SVN revision $Rev$

Source files: Data quality report (detailed, human readable) | Data quality report (concise, machine readable)

Observation information


Basic statistics of files

Param Original file Final file
FilenamemodeM0/AS1A11_080T01_9000005146_35925cztM0_level2.evt modeM0/AS1A11_080T01_9000005146_35925cztM0_level2_quad_clean.evt
Size (bytes)421,058,88079,649,280
Size401.6 MB 76.0 MB
Events in quadrant A2,795,359520,363
Events in quadrant B3,243,230517,280
Events in quadrant C3,095,840502,975
Events in quadrant D3,243,283486,197

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0320
B0320
C0320
D0330

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01120
B01120
C01120
D01120

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0117093
B0131442
C0124262
D0133382

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A5502200.363504%
B55021713.107961%
C55021222.217375%
D5502651.181389%

Noise dominated fraction

Noise dominated data is calculated using 1-second bins in cleaned event files. If a bin has >2000 counts, and if more than 50% of those come from <1% of pixels, then it is considered to be noise-dominated and hence unusable.

Quadrant # 1 sec bins Bins with >0 counts Bins with >2000 counts High rate bins dominated by noise Noise dominated (total time) Noise dominated (detector-on time) Marked lightcurve
A 7294 5503 14 14 0.19% 0.25%
B 7294 5503 106 106 1.45% 1.93%
C 7294 5503 92 92 1.26% 1.67%
D 7294 5503 43 43 0.59% 0.78%

Top noisy pixels

Top three noisy pixels from each quadrant. If the there are fewer than three noisy pixels in the level2.evt file, extra rows are filled as -1

Pixel properties Quadrant properties
Quadrant DetID PixID Counts Sigma Mean Median Sigma
A 10 83 166718 1270.61 650 641 130.7
A 9 143 98404 747.96 650 641 130.7
A 13 254 9449 67.39 650 641 130.7
B 5 172 632562 5213.13 638 624 121.2
B 5 255 30893 249.7 638 624 121.2
B 0 213 27911 225.1 638 624 121.2
C 0 10 322359 2234.9 620 625 144.0
C 15 214 231261 1602.09 620 625 144.0
C 0 207 124196 858.37 620 625 144.0
D 1 52 233713 1527.64 623 608 152.6
D 2 250 207132 1353.44 623 608 152.6
D 8 195 165725 1082.09 623 608 152.6

Detector plane histogram (DPH)

Histogram calculated using DETX and DETY for each event in the final _common_clean file

Quadrant A Quadrant B
Quadrant D Quadrant C

Count rate plots and images

Plot type Count rate plots Images
Comparison with Poisson distribution
Blue bars denote a histogram of data divided into 1 sec bins.
Red curve is a Poisson curve with rate = median count rate of data.
Quadrant-wise count rates
Data is divided into 100 sec bins
Module-wise count rates for Quadrant A
Data is divided into 100 sec bins
Module-wise count rates for Quadrant B
Data is divided into 100 sec bins
Module-wise count rates for Quadrant C
Data is divided into 100 sec bins
Module-wise count rates for Quadrant D
Data is divided into 100 sec bins

Housekeeping plots

Parameter Plot
CZT HV Monitor
D_VDD
Temperature 1
Veto HV Monitor
Veto LLD
Alpha Counter
_CPM_Rate
CZT Counter
+2.5 Volts monitor
+5 Volts monitor
_ROLL_ROT
_Roll_DEC
_Roll_RA
Veto Counter