ASTROSAT CZTI

Data Quality Report

Orbit 20250416_A13_031T01_9000006462_level2

Creation date: 2025-04-25T16:35:23.345898
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_031T01_9000006462cztM0_level2.fits modeM0/AS1A13_031T01_9000006462cztM0_level2_quad_clean.evt
Size (bytes)2,911,982,4001,177,251,840
Size2.7 GB 1.1 GB
Events in quadrant A16,917,3022,908,440
Events in quadrant B16,445,8683,204,958
Events in quadrant C15,868,4342,670,669
Events in quadrant D14,705,4562,639,577

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03950
B03970
C03930
D03960

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A010588680
B08836560
C011625650
D08992810

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A071630
B071780
C071590
D071580

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A353532248387.025672%
B353611148544.200661%
C3531794635813.125922%
D353356158794.493768%

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 399298 353362 0 0 0.00% 0.00%
B 399298 354056 0 0 0.00% 0.00%
C 399298 352519 0 0 0.00% 0.00%
D 399296 353240 0 0 0.00% 0.00%

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 14 188 17454 9.16 4460 4127 1454.7
A 9 255 17123 8.93 4460 4127 1454.7
A 14 95 14143 6.89 4460 4127 1454.7
B 2 9 19124 14.75 4365 4125 1016.9
B 2 8 17258 12.92 4365 4125 1016.9
B 9 173 13374 9.1 4365 4125 1016.9
C 7 221 13235 6.45 4259 3871 1451.5
C 2 31 12822 6.17 4259 3871 1451.5
C 15 127 12627 6.03 4259 3871 1451.5
D 6 218 18903 10.67 4222 3759 1419.7
D 3 30 14602 7.64 4222 3759 1419.7
D 15 11 13667 6.98 4222 3759 1419.7

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