ASTROSAT CZTI

Data Quality Report

Orbit 58587

Creation date: 2026-07-27T05:10:20.040016
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/AS1A14_044T04_9000006592_58587cztM0_level2.fits modeM0/AS1A14_044T04_9000006592_58587cztM0_level2_quad_clean.evt
Size (bytes)523,200,96093,715,200
Size499.0 MB 89.4 MB
Events in quadrant A4,338,141638,169
Events in quadrant B4,867,546657,312
Events in quadrant C6,260,519501,784
Events in quadrant D3,377,512571,095

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0174642
B0191532
C0232902
D0150082

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01380
B01380
C01380
D01380

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0230
B0230
C0230
D0230

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A67331111.648596%
B67334727.010248%
C6734143121.250371%
D6734600.891001%

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 9175 6931 50 50 0.54% 0.72%
B 9175 6925 282 282 3.07% 4.07%
C 9176 6932 1024 1024 11.16% 14.77%
D 9176 6932 32 32 0.35% 0.46%

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 3 14 1125135 6020.1 750 728 186.8
A 15 233 104017 553.01 750 728 186.8
A 12 114 95292 506.3 750 728 186.8
B 6 255 1154445 7319.42 735 708 157.6
B 5 172 196214 1240.31 735 708 157.6
B 4 171 132223 834.34 735 708 157.6
C 2 12 3119944 17746.0 640 637 175.8
C 12 254 139341 789.1 640 637 175.8
C 12 241 109557 619.66 640 637 175.8
D 2 249 142087 677.21 728 697 208.8
D 5 38 90888 431.99 728 697 208.8
D 3 12 73211 347.32 728 697 208.8

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