ASTROSAT CZTI

Data Quality Report

Orbit 52957

Creation date: 2025-07-17T10:18:20.431982
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/AS1A13_003T01_9000006486_52957cztM0_level2.fits modeM0/AS1A13_003T01_9000006486_52957cztM0_level2_quad_clean.evt
Size (bytes)1,086,174,72066,084,480
Size1.0 GB 63.0 MB
Events in quadrant A17,140,86025,912
Events in quadrant B3,305,816695,510
Events in quadrant C7,054,742530,726
Events in quadrant D12,171,427268,135

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A090
B090
C090
D090

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0554291
B0150101
C0258252
D0408991

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01380
B01380
C01380
D01380

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6900669296.985507%
B6901961.391103%
C6900105615.304348%
D6900401658.202899%

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 7754 6899 6613 6613 85.29% 95.85%
B 7756 6902 35 35 0.45% 0.51%
C 7755 6900 994 994 12.82% 14.41%
D 7755 6901 3468 3468 44.72% 50.25%

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 9 191 14445940 192770.41 293 287 74.9
A 4 249 1325215 17680.54 293 287 74.9
A 3 62 76762 1020.52 293 287 74.9
B 10 63 129463 839.6 710 684 153.4
B 4 81 56032 360.85 710 684 153.4
B 10 128 55397 356.71 710 684 153.4
C 2 12 1404174 7778.83 653 649 180.4
C 10 171 631808 3498.11 653 649 180.4
C 2 239 476189 2635.61 653 649 180.4
D 8 176 9885436 83244.66 413 395 118.7
D 15 78 199848 1679.65 413 395 118.7
D 11 247 92062 771.95 413 395 118.7

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