ASTROSAT CZTI

Data Quality Report

Orbit 20161213_G05_246T04_9000000882_level2

Creation date: 2025-11-08T12:08:13.162005
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_246T04_9000000882cztM0_level2.fits modeM0/AS1G05_246T04_9000000882cztM0_level2_quad_clean.evt
Size (bytes)1,311,989,7601,229,618,880
Size1.2 GB 1.1 GB
Events in quadrant A6,640,8826,955,576
Events in quadrant B6,428,6826,974,602
Events in quadrant C6,604,7596,734,496
Events in quadrant D11,688,3868,205,770

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02524960
B02641580
C02505940
D03242250

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A024920
B024940
C024900
D024840

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01910
B01910
C01910
D01900

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A12217214271.168025%
B12212522991.882497%
C12216910010.819357%
D12217338353.138991%

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 142592 122957 0 0 0.00% 0.00%
B 142592 122887 0 0 0.00% 0.00%
C 142592 122968 0 0 0.00% 0.00%
D 142592 122967 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 6780 11.87 1723 1606 435.9
A 0 29 6401 11.0 1723 1606 435.9
A 14 204 5824 9.68 1723 1606 435.9
B 2 9 5676 11.9 1697 1611 341.5
B 12 226 4568 8.66 1697 1611 341.5
B 14 254 4492 8.44 1697 1611 341.5
C 1 80 4976 7.26 1745 1611 463.7
C 1 81 4696 6.65 1745 1611 463.7
C 12 241 4588 6.42 1745 1611 463.7

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