ASTROSAT CZTI

Data Quality Report

Orbit 57287

Creation date: 2026-04-30T20:53:29.659016
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_049T03_9000006570_57287cztM0_level2.fits modeM0/AS1A14_049T03_9000006570_57287cztM0_level2_quad_clean.evt
Size (bytes)474,514,56096,252,480
Size452.5 MB 91.8 MB
Events in quadrant A3,333,620642,924
Events in quadrant B3,359,259683,156
Events in quadrant C6,641,608543,012
Events in quadrant D3,705,000574,396

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0143421
B0146961
C0244161
D0156821

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A090
B090
C090
D090

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01360
B01360
C01360
D01360

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6759550.813730%
B6760991.464497%
C676098514.571006%
D67601512.233728%

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 7644 6760 1 1 0.01% 0.01%
B 7645 6761 28 28 0.37% 0.41%
C 7645 6761 778 778 10.18% 11.51%
D 7645 6761 109 109 1.43% 1.61%

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 8 4 300795 1667.11 732 713 180.0
A 7 64 79223 436.16 732 713 180.0
A 3 14 75706 416.63 732 713 180.0
B 5 185 164619 1058.37 716 689 154.9
B 7 252 83776 536.43 716 689 154.9
B 10 247 80479 515.14 716 689 154.9
C 15 224 3278362 18138.15 661 656 180.7
C 14 254 243218 1342.29 661 656 180.7
C 2 12 139026 765.71 661 656 180.7
D 8 240 341116 1705.06 706 676 199.7
D 3 12 183965 917.98 706 676 199.7
D 7 96 124580 620.56 706 676 199.7

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