ASTROSAT CZTI

Data Quality Report

Orbit 31487

Creation date: 2024-06-27T20:29:09.113545
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/AS1T04_028T01_9000004584_31487cztM0_level2.evt modeM0/AS1T04_028T01_9000004584_31487cztM0_level2_quad_clean.evt
Size (bytes)526,366,08075,216,960
Size502.0 MB 71.7 MB
Events in quadrant A2,888,067476,085
Events in quadrant B5,946,529472,083
Events in quadrant C3,150,863466,670
Events in quadrant D3,555,651450,844

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01220
B01220
C01220
D01220

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01237383
B022196102
C01300088
D01449088

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0120
B0120
C0120
D0120

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A58942033.444181%
B589594516.030534%
C58932944.988970%
D58922063.496266%

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 6239 5898 1 1 0.02% 0.02%
B 6237 5898 543 543 8.71% 9.21%
C 6234 5895 27 27 0.43% 0.46%
D 6241 5896 35 35 0.56% 0.59%

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 0 13 13393 84.13 743 726 150.6
A 13 254 9535 58.5 743 726 150.6
A 0 230 8679 52.82 743 726 150.6
B 12 1 1535081 11011.49 707 688 139.3
B 6 159 1467610 10527.29 707 688 139.3
B 4 80 58241 413.03 707 688 139.3
C 0 10 178262 1061.29 704 707 167.3
C 14 238 113479 674.07 704 707 167.3
C 3 233 83350 493.98 704 707 167.3
D 8 195 582010 3383.72 718 699 171.8
D 12 218 82433 475.76 718 699 171.8
D 2 120 63425 365.12 718 699 171.8

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