ASTROSAT CZTI

Data Quality Report

Orbit 20200227_A07_142T01_9000003540_level2

Creation date: 2025-12-09T16:46:17.859698
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/AS1A07_142T01_9000003540cztM0_level2.fits modeM0/AS1A07_142T01_9000003540cztM0_level2_quad_clean.evt
Size (bytes)2,871,417,6002,424,594,240
Size2.7 GB 2.3 GB
Events in quadrant A18,262,59114,346,012
Events in quadrant B17,294,75614,325,296
Events in quadrant C17,271,70013,381,975
Events in quadrant D14,728,93911,976,269

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A04650
B04640
C04660
D04650

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A05946930
B06097450
C06209510
D08329580

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A057920
B057890
C057880
D057870

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A28319729571.044149%
B28320941901.479473%
C28318769452.452443%
D283003194216.862471%

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 345369 283683 0 0 0.00% 0.00%
B 345369 283714 0 0 0.00% 0.00%
C 345369 283713 0 0 0.00% 0.00%
D 345369 282369 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 0 29 17392 11.22 4755 4480 1150.8
A 7 110 14575 8.77 4755 4480 1150.8
A 0 30 13737 8.04 4755 4480 1150.8
B 2 9 13851 10.69 4579 4386 885.2
B 2 8 11620 8.17 4579 4386 885.2
B 3 17 11333 7.85 4579 4386 885.2
C 3 126 11798 6.54 4563 4276 1149.3
C 12 241 11758 6.51 4563 4276 1149.3
C 9 209 11509 6.29 4563 4276 1149.3
D 3 14 10740 6.25 4208 3834 1105.7
D 6 231 10484 6.01 4208 3834 1105.7
D 15 46 10483 6.01 4208 3834 1105.7

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