ASTROSAT CZTI

Data Quality Report

Orbit 51928

Creation date: 2025-05-05T01:34:18.904742
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/AS1C09_011T05_9000006466_51928cztM0_level2.fits modeM0/AS1C09_011T05_9000006466_51928cztM0_level2_quad_clean.evt
Size (bytes)1,058,253,12066,928,320
Size1009.2 MB 63.8 MB
Events in quadrant A9,695,712419,134
Events in quadrant B7,615,107521,603
Events in quadrant C9,474,677380,907
Events in quadrant D11,903,741266,149

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01260
B01260
C01260
D01260

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0331808
B0269481
C0325331
D0396761

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0110
B0110
C0110
D0110

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6282218934.845591%
B6282149223.750398%
C6283258441.126850%
D6283354456.406175%

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 7297 6283 2008 2008 27.52% 31.96%
B 7297 6283 1308 1308 17.93% 20.82%
C 7298 6284 2093 2093 28.68% 33.31%
D 7298 6283 3457 3457 47.37% 55.02%

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 4 95 3000158 20979.76 574 562 143.0
A 7 64 1880023 13145.32 574 562 143.0
A 12 3 1412947 9878.5 574 562 143.0
B 4 206 1702363 13534.05 594 575 125.7
B 10 44 1544436 12278.09 594 575 125.7
B 12 32 1414602 11245.54 594 575 125.7
C 15 224 4415786 29723.83 530 525 148.5
C 15 198 1120806 7541.81 530 525 148.5
C 15 218 515550 3467.18 530 525 148.5
D 12 17 6988416 55498.36 440 421 125.9
D 6 42 2055499 16321.34 440 421 125.9
D 3 12 258138 2046.78 440 421 125.9

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