ASTROSAT CZTI

Data Quality Report

Orbit 35874

Creation date: 2022-06-08T20:42:36.509253
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/AS1A11_080T01_9000005146_35874cztM0_level2.evt modeM0/AS1A11_080T01_9000005146_35874cztM0_level2_quad_clean.evt
Size (bytes)1,088,452,800231,785,280
Size1.0 GB 221.0 MB
Events in quadrant A8,051,1041,559,815
Events in quadrant B7,940,6351,536,062
Events in quadrant C7,594,7181,533,108
Events in quadrant D8,471,2011,464,208

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0540
B0540
C0540
D0540

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02740
B02740
C02740
D02740

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0323405
B0315833
C0300113
D0341803

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A13431520.387164%
B134313022.248530%
C134312111.570992%
D134311741.295510%

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 18779 13435 26 26 0.14% 0.19%
B 18779 13435 214 214 1.14% 1.59%
C 18779 13435 173 173 0.92% 1.29%
D 18779 13435 139 139 0.74% 1.03%

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 7 48 881507 2666.47 1637 1613 330.0
A 15 169 483705 1460.95 1637 1613 330.0
A 10 83 318870 961.43 1637 1613 330.0
B 5 172 1243227 4087.43 1607 1569 303.8
B 5 255 131561 427.92 1607 1569 303.8
B 15 85 51674 164.94 1607 1569 303.8
C 15 214 546163 1487.16 1583 1605 366.2
C 0 10 345055 937.95 1583 1605 366.2
C 1 23 309292 840.28 1583 1605 366.2
D 8 195 1052227 2715.31 1586 1547 386.9
D 13 249 422508 1087.9 1586 1547 386.9
D 7 223 243777 626.0 1586 1547 386.9

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