ASTROSAT CZTI

Data Quality Report

Orbit 20180512_A04_229T01_9000002096_level2

Creation date: 2025-11-22T08:45:00.870260
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/AS1A04_229T01_9000002096cztM0_level2.fits modeM0/AS1A04_229T01_9000002096cztM0_level2_quad_clean.evt
Size (bytes)960,549,120965,237,760
Size916.1 MB 920.5 MB
Events in quadrant A5,916,1885,909,496
Events in quadrant B5,669,7206,122,745
Events in quadrant C5,726,1445,444,045
Events in quadrant D4,974,2184,953,558

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01360
B01360
C01360
D01360

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02072900
B02202900
C02083330
D02395520

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A020200
B020200
C020200
D020200

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A992829170.923632%
B9928218271.840213%
C992828010.806793%
D9928215191.529985%

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 112743 99280 0 0 0.00% 0.00%
B 112743 99273 0 0 0.00% 0.00%
C 112743 99282 0 0 0.00% 0.00%
D 112743 99279 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 5657 10.93 1541 1443 385.5
A 7 110 4774 8.64 1541 1443 385.5
A 9 19 4497 7.92 1541 1443 385.5
B 2 9 4894 11.83 1495 1424 293.3
B 3 17 3818 8.16 1495 1424 293.3
B 14 254 3715 7.81 1495 1424 293.3
C 12 241 4123 6.88 1514 1406 394.8
C 3 126 3829 6.14 1514 1406 394.8
C 3 158 3821 6.12 1514 1406 394.8
D 3 14 3610 6.1 1418 1283 381.7
D 6 231 3594 6.05 1418 1283 381.7
D 7 3 3537 5.9 1418 1283 381.7

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