ASTROSAT CZTI

Data Quality Report

Orbit 57977

Creation date: 2026-06-16T04:15:15.170094
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_031T01_9000006584_57977cztM0_level2.fits modeM0/AS1A14_031T01_9000006584_57977cztM0_level2_quad_clean.evt
Size (bytes)571,806,72094,034,880
Size545.3 MB 89.7 MB
Events in quadrant A3,213,760644,648
Events in quadrant B4,267,277686,891
Events in quadrant C7,556,797506,756
Events in quadrant D5,609,571542,143

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A090
B090
C090
D090

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0145652
B0172422
C0271242
D0212872

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01360
B01360
C01360
D01360

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6693711.060810%
B66931502.241147%
C6693139320.812789%
D66944767.110846%

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 7568 6694 42 42 0.55% 0.63%
B 7568 6694 88 88 1.16% 1.31%
C 7568 6694 1242 1242 16.41% 18.55%
D 7569 6695 446 446 5.89% 6.66%

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 10 251 233424 1296.77 727 708 179.5
A 3 245 75815 418.52 727 708 179.5
A 8 6 32723 178.4 727 708 179.5
B 10 128 1046717 6757.66 720 694 154.8
B 0 63 80871 517.97 720 694 154.8
B 0 157 52581 335.21 720 694 154.8
C 15 224 4978202 28497.96 632 627 174.7
C 12 252 89603 509.41 632 627 174.7
C 14 254 12554 68.29 632 627 174.7
D 12 110 2555885 13007.36 688 658 196.4
D 2 31 138171 700.01 688 658 196.4
D 5 173 47323 237.55 688 658 196.4

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