ASTROSAT CZTI

Data Quality Report

Orbit 20210805_A10_056T01_9000004626_level2

Creation date: 2025-12-28T06:36:18.538363
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/AS1A10_056T01_9000004626cztM0_level2.fits modeM0/AS1A10_056T01_9000004626cztM0_level2_quad_clean.evt
Size (bytes)877,282,560712,203,840
Size836.6 MB 679.2 MB
Events in quadrant A5,433,6244,017,098
Events in quadrant B5,199,2624,105,013
Events in quadrant C5,321,8543,913,096
Events in quadrant D4,762,8023,682,206

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01945460
B02664580
C02214070
D02103650

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01760
B01760
C01760
D01760

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A017360
B017360
C017360
D017360

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A8534030173.535271%
B8534122612.649371%
C8534142985.036266%
D853419261.085059%

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 123150 85266 0 0 0.00% 0.00%
B 123149 85337 0 0 0.00% 0.00%
C 123149 85325 0 0 0.00% 0.00%
D 123148 85326 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 4528 9.24 1418 1343 344.9
A 7 110 4387 8.83 1418 1343 344.9
A 9 19 4048 7.84 1418 1343 344.9
B 2 9 4216 10.8 1381 1325 267.7
B 2 8 3495 8.11 1381 1325 267.7
B 3 17 3433 7.87 1381 1325 267.7
C 1 81 4149 7.93 1412 1333 355.2
C 1 80 4078 7.73 1412 1333 355.2
C 3 187 3609 6.41 1412 1333 355.2
D 10 189 3456 6.21 1365 1251 355.1
D 7 3 3305 5.78 1365 1251 355.1
D 10 113 3290 5.74 1365 1251 355.1

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