ASTROSAT CZTI

Data Quality Report

Orbit 20170817_A03_099T01_9000001472_level2

Creation date: 2025-11-16T19:14:17.354732
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/AS1A03_099T01_9000001472cztM0_level2.fits modeM0/AS1A03_099T01_9000001472cztM0_level2_quad_clean.evt
Size (bytes)1,175,503,6801,192,354,560
Size1.1 GB 1.1 GB
Events in quadrant A7,070,1647,127,825
Events in quadrant B6,840,3127,132,165
Events in quadrant C7,046,2706,963,486
Events in quadrant D6,214,4606,463,447

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02777300
B02702930
C02535630
D03032640

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A025190
B025170
C025120
D025140

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02220
B02230
C02230
D02210

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A12196422501.844807%
B12213218151.486097%
C1228849140.743791%
D12523825432.030534%

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 149350 125565 0 0 0.00% 0.00%
B 149350 125839 0 0 0.00% 0.00%
C 149350 126262 0 0 0.00% 0.00%
D 149350 126479 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 6815 11.27 1837 1722 451.9
A 7 110 5682 8.76 1837 1722 451.9
A 9 19 5281 7.88 1837 1722 451.9
B 2 9 5666 11.19 1806 1723 352.5
B 3 17 4596 8.15 1806 1723 352.5
B 14 254 4574 8.09 1806 1723 352.5
C 1 81 5232 7.23 1859 1730 484.2
C 1 80 5196 7.16 1859 1730 484.2
C 12 241 4988 6.73 1859 1730 484.2
D 6 231 4607 6.36 1770 1613 470.5
D 3 14 4532 6.2 1770 1613 470.5
D 7 5 4374 5.87 1770 1613 470.5

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