ASTROSAT CZTI

Data Quality Report

Orbit 55876

Creation date: 2026-01-27T11:12:30.328227
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_030T02_9000006544_55876cztM0_level2.fits modeM0/AS1A14_030T02_9000006544_55876cztM0_level2_quad_clean.evt
Size (bytes)1,482,396,480259,637,760
Size1.4 GB 247.6 MB
Events in quadrant A10,816,1381,760,233
Events in quadrant B9,167,6351,914,422
Events in quadrant C11,974,3891,631,261
Events in quadrant D21,389,9041,197,568

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A04000
B04000
C04000
D04000

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A080
B080
C080
D080

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0463463
B0418789
C0506234
D0773603

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A196945352.716563%
B196913621.838403%
C1969411305.737788%
D19694504125.596628%

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 20589 19697 186 186 0.90% 0.94%
B 20589 19695 65 65 0.32% 0.33%
C 20589 19697 834 834 4.05% 4.23%
D 20589 19696 3442 3442 16.72% 17.48%

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 4 249 1040214 2049.14 2060 2009 506.7
A 12 115 595246 1170.89 2060 2009 506.7
A 15 32 380552 747.14 2060 2009 506.7
B 0 153 381671 863.16 2036 1958 439.9
B 7 0 255782 576.99 2036 1958 439.9
B 0 199 84933 188.62 2036 1958 439.9
C 15 199 1826965 3451.75 1951 1932 528.7
C 13 3 979824 1849.52 1951 1932 528.7
C 6 223 537392 1012.73 1951 1932 528.7
D 11 129 8786613 18265.01 1702 1628 481.0
D 15 125 2155729 4478.63 1702 1628 481.0
D 2 62 1679389 3488.26 1702 1628 481.0

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