ASTROSAT CZTI

Data Quality Report

Orbit 58521

Creation date: 2026-07-22T19:51:37.608125
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_044T04_9000006592_58521cztM0_level2.fits modeM0/AS1A14_044T04_9000006592_58521cztM0_level2_quad_clean.evt
Size (bytes)1,310,866,560272,407,680
Size1.2 GB 259.8 MB
Events in quadrant A10,039,2401,782,422
Events in quadrant B11,999,3601,870,545
Events in quadrant C12,054,1541,680,601
Events in quadrant D12,922,8731,571,447

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0434142
B0486582
C0495382
D0516632

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03940
B03940
C03940
D03940

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A090
B090
C090
D090

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A194846383.274482%
B1948510785.532461%
C194849724.988709%
D1948411716.010060%

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 20409 19484 145 145 0.71% 0.74%
B 20410 19485 412 412 2.02% 2.11%
C 20409 19484 614 614 3.01% 3.15%
D 20409 19484 717 717 3.51% 3.68%

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 17 675141 1249.42 2184 2124 538.7
A 12 114 278612 513.29 2184 2124 538.7
A 3 14 208116 382.41 2184 2124 538.7
B 4 171 1874052 4071.65 2142 2058 459.8
B 8 234 306040 661.17 2142 2058 459.8
B 0 199 301363 651.0 2142 2058 459.8
C 14 245 1112353 1933.08 2101 2080 574.4
C 4 5 784812 1362.8 2101 2080 574.4
C 6 223 611043 1060.26 2101 2080 574.4
D 3 12 2798441 4782.69 2094 2003 584.7
D 8 240 467447 796.04 2094 2003 584.7
D 12 248 244722 415.12 2094 2003 584.7

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