ASTROSAT CZTI

Data Quality Report

Orbit 57275

Creation date: 2026-04-30T12:07:08.753555
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_57275cztM0_level2.fits modeM0/AS1A14_049T03_9000006570_57275cztM0_level2_quad_clean.evt
Size (bytes)460,071,36080,804,160
Size438.8 MB 77.1 MB
Events in quadrant A5,237,177489,654
Events in quadrant B3,105,688587,242
Events in quadrant C4,950,530482,703
Events in quadrant D3,294,176488,222

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0194651
B0132261
C0187281
D0139522

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0110
B0110
C0110
D0110

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01180
B01180
C01180
D01180

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A569682714.518961%
B56961202.106742%
C569760010.531859%
D56961903.335674%

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 6821 5697 620 620 9.09% 10.88%
B 6821 5697 70 70 1.03% 1.23%
C 6822 5698 473 473 6.93% 8.30%
D 6821 5697 159 159 2.33% 2.79%

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 95 1788573 12663.52 569 554 141.2
A 7 64 720582 5099.55 569 554 141.2
A 8 4 362878 2566.13 569 554 141.2
B 5 185 358947 2776.05 598 578 129.1
B 0 199 86244 663.6 598 578 129.1
B 8 234 75213 578.15 598 578 129.1
C 15 224 2253052 14942.24 553 546 150.7
C 12 252 246289 1630.16 553 546 150.7
C 14 254 132975 878.48 553 546 150.7
D 2 249 564448 3456.27 575 548 163.2
D 8 240 181979 1112.03 575 548 163.2
D 12 128 63082 383.29 575 548 163.2

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