ASTROSAT CZTI

Data Quality Report

Orbit 20190922_T03_138T08_9000003188_level2

Creation date: 2025-12-03T20:53:51.077506
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/AS1T03_138T08_9000003188cztM0_level2.fits modeM0/AS1T03_138T08_9000003188cztM0_level2_quad_clean.evt
Size (bytes)50,947,20046,221,120
Size48.6 MB 44.1 MB
Events in quadrant A310,642270,331
Events in quadrant B298,924272,298
Events in quadrant C299,368258,126
Events in quadrant D259,642223,892

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A020
B020
C020
D020

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0111600
B0111380
C0112140
D0137900

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01080
B01080
C01080
D01080

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A53471352.524780%
B53471472.749205%
C53471653.085843%
D53473055.704133%

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 5582 5347 0 0 0.00% 0.00%
B 5582 5347 0 0 0.00% 0.00%
C 5582 5347 0 0 0.00% 0.00%
D 5582 5347 0 0 0.00% 0.00%

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 14 188 297 10.07 80 75 22.0
A 14 204 275 9.08 80 75 22.0
A 0 29 273 8.98 80 75 22.0
B 2 9 221 8.25 78 75 17.7
B 5 232 209 7.57 78 75 17.7
B 2 8 209 7.57 78 75 17.7
C 3 126 238 7.52 79 74 21.8
C 3 235 211 6.28 79 74 21.8
C 12 242 208 6.14 79 74 21.8
D 10 113 195 6.07 74 67 21.1
D 1 19 193 5.98 74 67 21.1
D 10 189 189 5.79 74 67 21.1

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