ASTROSAT CZTI

Data Quality Report

Orbit 20180803_G08_072T01_9000002272_level2

Creation date: 2025-11-23T20:45:09.334200
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/AS1G08_072T01_9000002272cztM0_level2.fits modeM0/AS1G08_072T01_9000002272cztM0_level2_quad_clean.evt
Size (bytes)663,762,240625,106,880
Size633.0 MB 596.1 MB
Events in quadrant A4,132,8783,788,583
Events in quadrant B3,957,8703,845,108
Events in quadrant C4,036,1503,685,441
Events in quadrant D3,174,8982,817,312

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A014200
B014200
C014200
D014180

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01150
B01150
C01150
D01150

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01520260
B01562650
C01567470
D02742190

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6992313241.893511%
B6992611471.640305%
C699199841.407343%
D699191269118.151003%

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 81317 69908 0 0 0.00% 0.00%
B 81317 69918 0 0 0.00% 0.00%
C 81317 69919 0 0 0.00% 0.00%
D 81317 69841 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 4060 11.5 1077 1012 265.0
A 7 110 3367 8.89 1077 1012 265.0
A 0 30 3085 7.82 1077 1012 265.0
B 2 9 3258 10.99 1048 1002 205.2
B 2 8 2720 8.37 1048 1002 205.2
B 3 17 2703 8.29 1048 1002 205.2
C 12 241 2764 6.44 1066 992 275.2
C 7 111 2713 6.25 1066 992 275.2
C 9 242 2682 6.14 1066 992 275.2
D 6 231 2346 6.3 907 823 241.7
D 6 38 2252 5.91 907 823 241.7
D 6 67 2205 5.72 907 823 241.7

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