ASTROSAT CZTI

Data Quality Report

Orbit 56686

Creation date: 2026-03-21T08:15:08.044503
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_083T06_9000006558_56686cztM0_level2.fits modeM0/AS1A14_083T06_9000006558_56686cztM0_level2_quad_clean.evt
Size (bytes)598,826,880141,494,400
Size571.1 MB 134.9 MB
Events in quadrant A5,507,2201,060,156
Events in quadrant B4,191,5651,010,381
Events in quadrant C7,164,165615,924
Events in quadrant D4,653,2611,016,527

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01700
B01700
C01700
D01700

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A020
B020
C020
D020

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0226401
B0187281
C0276571
D0202651

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A83724495.363115%
B83731591.898961%
C8373149017.795294%
D83731311.564553%

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 8542 8374 315 315 3.69% 3.76%
B 8543 8375 23 23 0.27% 0.27%
C 8543 8374 1125 1125 13.17% 13.43%
D 8543 8375 164 164 1.92% 1.96%

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 8 26 753251 2725.91 1010 988 276.0
A 4 249 303195 1095.08 1010 988 276.0
A 10 251 276531 998.46 1010 988 276.0
B 4 21 147281 698.17 957 922 209.6
B 10 247 62709 294.74 957 922 209.6
B 8 128 57203 268.48 957 922 209.6
C 15 230 2935943 13174.53 804 795 222.8
C 15 215 561130 2515.09 804 795 222.8
C 13 3 141863 633.19 804 795 222.8
D 2 249 300280 982.63 997 952 304.6
D 5 173 78091 253.23 997 952 304.6
D 2 236 57095 184.31 997 952 304.6

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