ASTROSAT CZTI

Data Quality Report

Orbit 56912

Creation date: 2026-04-05T12:16:50.313848
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_083T14_9000006564_56912cztM0_level2.fits modeM0/AS1A14_083T14_9000006564_56912cztM0_level2_quad_clean.evt
Size (bytes)610,804,80084,231,360
Size582.5 MB 80.3 MB
Events in quadrant A10,187,200382,246
Events in quadrant B3,520,429642,371
Events in quadrant C3,947,371568,388
Events in quadrant D4,473,278524,107

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01260
B01260
C01260
D01260

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0110
B0110
C0110
D0110

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0345293
B0148541
C0160061
D0175311

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6208264142.541881%
B62082093.366624%
C62092634.235787%
D62094016.458367%

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 7317 6208 2326 2326 31.79% 37.47%
B 7318 6209 89 89 1.22% 1.43%
C 7319 6210 177 177 2.42% 2.85%
D 7319 6210 298 298 4.07% 4.80%

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 7 64 7556288 57467.58 529 515 131.5
A 4 95 174843 1325.9 529 515 131.5
A 4 249 148194 1123.21 529 515 131.5
B 5 172 489560 3578.67 648 626 136.6
B 10 16 174988 1276.21 648 626 136.6
B 5 185 110169 801.78 648 626 136.6
C 13 3 1083996 6212.47 641 633 174.4
C 1 16 172405 985.01 641 633 174.4
C 7 87 58612 332.48 641 633 174.4
D 8 240 520599 2933.62 628 600 177.3
D 2 31 439813 2477.86 628 600 177.3
D 3 12 209894 1180.75 628 600 177.3

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