ASTROSAT CZTI

Data Quality Report

Orbit 51548

Creation date: 2025-04-09T12:52:25.393402
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/AS1A13_090T01_9000006458_51548cztM0_level2.fits modeM0/AS1A13_090T01_9000006458_51548cztM0_level2_quad_clean.evt
Size (bytes)948,487,680117,587,520
Size904.5 MB 112.1 MB
Events in quadrant A10,190,177750,181
Events in quadrant B12,107,810675,418
Events in quadrant C4,716,739798,129
Events in quadrant D7,401,195712,372

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0378761284
B0442242022
C021593923
D029470916

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A020
B020
C020
D020

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01906
B01893
C01895
D01897

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A8980111612.427617%
B8915252028.266966%
C90221872.072711%
D90246567.269504%

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 9264 9142 759 759 8.19% 8.30%
B 9276 9062 1962 1962 21.15% 21.65%
C 9267 9138 128 128 1.38% 1.40%
D 9287 9154 592 592 6.37% 6.47%

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 12 3 2490224 10757.12 934 909 231.4
A 12 250 1531622 6614.7 934 909 231.4
A 12 17 1267562 5473.61 934 909 231.4
B 10 44 6042548 32391.2 869 840 186.5
B 15 52 797198 4269.49 869 840 186.5
B 4 81 726234 3889.03 869 840 186.5
C 13 3 452392 1688.68 960 952 267.3
C 3 233 102871 381.24 960 952 267.3
C 10 19 71165 262.64 960 952 267.3
D 8 176 2401517 9296.78 921 891 258.2
D 12 6 429295 1659.06 921 891 258.2
D 7 60 270169 1042.82 921 891 258.2

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