ASTROSAT CZTI

Data Quality Report

Orbit 20200127_A07_138T01_9000003466_level2

Creation date: 2025-12-09T00:47:30.375089
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/AS1A07_138T01_9000003466cztM0_level2.fits modeM0/AS1A07_138T01_9000003466cztM0_level2_quad_clean.evt
Size (bytes)311,788,800191,188,800
Size297.3 MB 182.3 MB
Events in quadrant A1,960,848961,607
Events in quadrant B1,814,522952,161
Events in quadrant C1,882,740913,140
Events in quadrant D1,663,278840,243

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A06190
B06200
C06250
D06280

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0645740
B0729160
C0656360
D0712980

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0560
B0570
C0580
D0570

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A308853211.039339%
B3076412013.903914%
C309495321.718957%
D309176382.063590%

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 31368 27260 0 0 0.00% 0.00%
B 31368 27173 0 0 0.00% 0.00%
C 31368 27259 0 0 0.00% 0.00%
D 31368 27248 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 0 29 1930 11.59 509 479 125.2
A 7 110 1591 8.88 509 479 125.2
A 0 30 1461 7.84 509 479 125.2
B 2 9 1498 10.76 480 458 96.7
B 2 8 1239 8.08 480 458 96.7
B 5 232 1197 7.64 480 458 96.7
C 12 241 1292 6.52 497 466 126.7
C 12 249 1269 6.34 497 466 126.7
C 9 209 1259 6.26 497 466 126.7
D 6 231 1211 6.15 475 433 126.5
D 3 14 1180 5.91 475 433 126.5
D 10 189 1178 5.89 475 433 126.5

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