ASTROSAT CZTI

Data Quality Report

Orbit 20160903_G05_218T04_9000000640_level2

Creation date: 2025-11-05T02:37:00.278720
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/AS1G05_218T04_9000000640cztM0_level2.fits modeM0/AS1G05_218T04_9000000640cztM0_level2_quad_clean.evt
Size (bytes)919,546,560846,650,880
Size876.9 MB 807.4 MB
Events in quadrant A5,572,2384,984,217
Events in quadrant B5,391,2205,045,398
Events in quadrant C5,474,0024,780,223
Events in quadrant D4,433,5283,861,138

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A020740
B020740
C020740
D020640

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01380
B01380
C01380
D01380

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02300050
B02145800
C02242770
D03254770

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A10171131753.121590%
B10169115291.503575%
C10170811701.150352%
D1016491432414.091629%

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 151810 101941 0 0 0.00% 0.00%
B 151810 101947 0 0 0.00% 0.00%
C 151810 101949 0 0 0.00% 0.00%
D 151810 101296 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 5408 10.97 1444 1342 370.7
A 0 29 5327 10.75 1444 1342 370.7
A 7 110 4757 9.21 1444 1342 370.7
B 2 9 4563 11.23 1421 1347 286.4
B 12 226 3829 8.67 1421 1347 286.4
B 14 254 3810 8.6 1421 1347 286.4
C 12 241 3947 6.78 1445 1329 386.3
C 1 80 3903 6.66 1445 1329 386.3
C 1 81 3835 6.49 1445 1329 386.3
D 11 82 3440 6.75 1263 1146 339.8
D 3 14 3256 6.21 1263 1146 339.8
D 1 19 3221 6.11 1263 1146 339.8

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