ASTROSAT CZTI

Data Quality Report

Orbit 52936

Creation date: 2025-07-24T10:25:20.643564
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_52936cztM0_level2.fits modeM0/AS1A13_003T01_9000006486_52936cztM0_level2_quad_clean.evt
Size (bytes)1,184,811,84072,054,720
Size1.1 GB 68.7 MB
Events in quadrant A18,331,42912,527
Events in quadrant B3,894,029748,675
Events in quadrant C7,838,901575,793
Events in quadrant D13,232,741338,872

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A050
B050
C050
D050

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0594420
B0165510
C0282520
D0443520

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01460
B01460
C01460
D01460

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A7265716898.664831%
B72652002.752925%
C7266121016.652904%
D7266371951.183595%

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 7774 7264 6678 6678 85.90% 91.93%
B 7775 7266 19 19 0.24% 0.26%
C 7776 7267 979 979 12.59% 13.47%
D 7775 7265 3069 3069 39.47% 42.24%

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 16905043 244796.28 273 266 69.1
A 4 254 144599 2090.07 273 266 69.1
A 4 238 38141 548.46 273 266 69.1
B 10 254 378554 2228.21 796 769 169.5
B 4 81 67646 394.45 796 769 169.5
B 1 255 60842 354.32 796 769 169.5
C 7 80 1884089 9393.43 736 730 200.5
C 15 224 1423250 7094.95 736 730 200.5
C 1 109 515720 2568.56 736 730 200.5
D 6 42 3355536 19133.02 612 583 175.3
D 8 176 2442239 13924.56 612 583 175.3
D 15 78 2399718 13682.07 612 583 175.3

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