ASTROSAT CZTI

Data Quality Report

Orbit 10502

Creation date: 2024-06-27T16:00:14.752695
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/AS1A03_127T02_9000001522_10502cztM0_level2.evt modeM0/AS1A03_127T02_9000001522_10502cztM0_level2_quad_clean.evt
Size (bytes)876,994,560232,202,880
Size836.4 MB 221.4 MB
Events in quadrant A6,148,2201,543,882
Events in quadrant B6,577,7101,430,935
Events in quadrant C5,889,4471,626,198
Events in quadrant D7,068,8521,539,531

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03313
B03515
C03515
D03212

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A04417117273
B05500627755
C04401217187
D05017620779

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0444160
B0444159
C0444159
D0425148

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A13082890.680324%
B119993262.716893%
C13232630.476119%
D131721060.804737%

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 16620 14135 4 4 0.02% 0.03%
B 16619 13025 158 158 0.95% 1.21%
C 16620 14192 10 10 0.06% 0.07%
D 16620 13792 35 35 0.21% 0.25%

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 3 80 185637 606.51 1495 1460 303.7
A 15 239 136258 443.9 1495 1460 303.7
A 5 16 43194 137.43 1495 1460 303.7
B 4 239 930490 3583.82 1374 1341 259.3
B 11 51 110774 422.09 1374 1341 259.3
B 0 214 84526 320.85 1374 1341 259.3
C 14 234 45444 127.89 1497 1500 343.6
C 13 61 11179 28.17 1497 1500 343.6
C 14 67 5291 11.03 1497 1500 343.6
D 2 16 440536 1252.42 1475 1433 350.6
D 1 20 413355 1174.9 1475 1433 350.6
D 1 52 184913 523.33 1475 1433 350.6

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