ASTROSAT CZTI

Data Quality Report

Orbit 20170520_A03_092T01_9000001240_level2

Creation date: 2025-11-13T18:44:30.276037
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_092T01_9000001240cztM0_level2.fits modeM0/AS1A03_092T01_9000001240cztM0_level2_quad_clean.evt
Size (bytes)2,926,425,6003,091,849,920
Size2.7 GB 2.9 GB
Events in quadrant A17,669,44918,858,364
Events in quadrant B17,115,92618,882,271
Events in quadrant C17,458,55517,949,984
Events in quadrant D15,034,11416,607,833

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A05050
B05020
C05020
D05030

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A061940
B061910
C062080
D062120

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A07307840
B06652700
C06399000
D07467130

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A31216459271.898681%
B31225144841.436024%
C31226721910.701643%
D31217965042.083420%

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 367406 312708 0 0 0.00% 0.00%
B 367406 312679 0 0 0.00% 0.00%
C 367406 312850 0 0 0.00% 0.00%
D 367406 312708 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 17001 11.03 4596 4306 1150.4
A 7 110 14762 9.09 4596 4306 1150.4
A 0 30 13249 7.77 4596 4306 1150.4
B 2 9 14714 11.85 4515 4301 879.0
B 12 226 11655 8.37 4515 4301 879.0
B 14 254 11459 8.14 4515 4301 879.0
C 1 80 12853 7.13 4612 4272 1203.6
C 1 81 12645 6.96 4612 4272 1203.6
C 12 241 12353 6.71 4612 4272 1203.6
D 3 14 11631 6.85 4296 3915 1127.1
D 6 231 11024 6.31 4296 3915 1127.1
D 3 31 10907 6.2 4296 3915 1127.1

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