ASTROSAT CZTI

Data Quality Report

Orbit 20200727_A09_138T04_9000003776_level2

Creation date: 2025-12-14T00:20:32.409723
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/AS1A09_138T04_9000003776cztM0_level2.fits modeM0/AS1A09_138T04_9000003776cztM0_level2_quad_clean.evt
Size (bytes)3,249,829,4402,585,188,800
Size3.0 GB 2.4 GB
Events in quadrant A20,009,63814,581,142
Events in quadrant B19,316,44814,984,520
Events in quadrant C19,689,40213,958,767
Events in quadrant D17,274,94212,640,429

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A05180
B05180
C05180
D05180

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A065800
B065780
C065760
D065800

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A07572630
B06813890
C07118090
D08433190

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A32290594992.941732%
B32316551541.594851%
C32311480192.481787%
D323072147254.557808%

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 378517 322904 0 0 0.00% 0.00%
B 378516 323211 0 0 0.00% 0.00%
C 378516 323157 0 0 0.00% 0.00%
D 378516 322887 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 16476 9.18 5212 4899 1260.9
A 7 110 15790 8.64 5212 4899 1260.9
A 9 19 15050 8.05 5212 4899 1260.9
B 2 9 15591 10.81 5105 4871 992.0
B 2 8 12979 8.17 5105 4871 992.0
B 5 128 12731 7.92 5105 4871 992.0
C 12 241 13728 6.78 5207 4892 1303.7
C 3 126 13507 6.61 5207 4892 1303.7
C 2 191 13021 6.24 5207 4892 1303.7
D 3 14 12181 5.99 4929 4503 1282.7
D 10 189 12103 5.92 4929 4503 1282.7
D 15 46 12100 5.92 4929 4503 1282.7

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