ASTROSAT CZTI

Data Quality Report

Orbit 20210701_A10_071T66_9000004498_level2

Creation date: 2025-12-27T08:08:51.203870
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/AS1A10_071T66_9000004498cztM0_level2.fits modeM0/AS1A10_071T66_9000004498cztM0_level2_quad_clean.evt
Size (bytes)337,429,440234,092,160
Size321.8 MB 223.2 MB
Events in quadrant A2,084,8731,237,845
Events in quadrant B1,943,6961,219,007
Events in quadrant C2,005,4921,157,092
Events in quadrant D1,734,8021,024,106

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0731880
B01087290
C0779360
D01139660

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0520
B0520
C0520
D0520

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A08420
B08420
C08420
D07220

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A353763901.102442%
B353578282.341828%
C353648562.420541%
D3538017274.881289%

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 39531 35340 0 0 0.00% 0.00%
B 39530 35339 0 0 0.00% 0.00%
C 39530 35334 0 0 0.00% 0.00%
D 39530 35325 0 0 0.00% 0.00%

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 29 2023 11.27 542 508 134.4
A 7 110 1653 8.52 542 508 134.4
A 0 30 1550 7.75 542 508 134.4
B 2 9 1615 10.86 513 488 103.8
B 2 8 1393 8.72 513 488 103.8
B 5 232 1348 8.29 513 488 103.8
C 12 241 1398 6.64 530 494 136.2
C 9 233 1351 6.29 530 494 136.2
C 7 111 1347 6.26 530 494 136.2
D 15 46 1332 6.61 495 449 133.7
D 10 189 1253 6.01 495 449 133.7
D 4 160 1224 5.8 495 449 133.7

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