ASTROSAT CZTI

Data Quality Report

Orbit 20210512_T04_002T01_9000004374_level2

Creation date: 2025-12-25T14:00:38.243747
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_002T01_9000004374cztM0_level2.fits modeM0/AS1T04_002T01_9000004374cztM0_level2_quad_clean.evt
Size (bytes)217,794,240241,758,720
Size207.7 MB 230.6 MB
Events in quadrant A1,335,0201,519,068
Events in quadrant B1,259,8181,496,511
Events in quadrant C1,271,2961,421,485
Events in quadrant D1,123,4781,278,912

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0170
B0170
C0170
D0170

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0478180
B0718000
C0505090
D0573180

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A04760
B04760
C04760
D04760

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A233321940.831476%
B233324581.962969%
C2333215636.698954%
D233329404.028802%

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 29364 23330 0 0 0.00% 0.00%
B 29364 23327 0 0 0.00% 0.00%
C 29364 23297 0 0 0.00% 0.00%
D 29364 23278 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 1152 9.31 348 327 88.7
A 7 110 1062 8.29 348 327 88.7
A 9 19 1028 7.91 348 327 88.7
B 2 9 1063 11.04 333 318 67.5
B 14 254 880 8.33 333 318 67.5
B 5 255 851 7.9 333 318 67.5
C 12 241 892 6.72 336 314 86.1
C 2 191 869 6.45 336 314 86.1
C 12 250 866 6.41 336 314 86.1
D 3 14 904 7.1 320 291 86.3
D 15 46 847 6.44 320 291 86.3
D 10 189 831 6.26 320 291 86.3

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