ASTROSAT CZTI

Data Quality Report

Orbit 20210719_T04_026T01_9000004556_level2

Creation date: 2021-07-21T18:15:48.602570
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_026T01_9000004556cztM0_level2_bc.evt modeM0/AS1T04_026T01_9000004556cztM0_level2_quad_clean.evt
Size (bytes)3,897,455,0401,099,546,560
Size3.6 GB 1.0 GB
Events in quadrant A18,366,2197,050,255
Events in quadrant B41,588,0837,010,529
Events in quadrant C20,183,8846,827,874
Events in quadrant D32,128,8556,600,385

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01360
B01360
C01360
D01360

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01768740
B02594700
C01887540
D02291650

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A016440
B016440
C016440
D016440

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A8510811821.388824%
B8511023032.705910%
C8511128923.397916%
D8510749235.784483%

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 99189 85114 0 0 0.00% 0.00%
B 99189 85115 11 11 0.01% 0.01%
C 99189 85113 9 9 0.01% 0.01%
D 99189 85114 294 294 0.30% 0.35%

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 13 254 133874 128.33 4739 4667 1006.8
A 12 16 73889 68.75 4739 4667 1006.8
A 12 194 40625 35.71 4739 4667 1006.8
B 6 159 22318874 24938.19 4738 4633 894.8
B 4 80 517937 573.66 4738 4633 894.8
B 0 190 306953 337.87 4738 4633 894.8
C 3 233 1343279 1229.68 4587 4576 1088.7
C 10 22 749542 684.29 4587 4576 1088.7
C 14 254 183601 164.44 4587 4576 1088.7
D 12 218 7582195 6827.23 4593 4481 1109.9
D 8 195 4768060 4291.81 4593 4481 1109.9
D 10 203 619206 553.84 4593 4481 1109.9

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