ASTROSAT CZTI

Data Quality Report

Orbit 21157

Creation date: 2024-06-27T18:24:14.261770
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/AS1T03_136T01_9000003124_21157cztM0_level2.evt modeM0/AS1T03_136T01_9000003124_21157cztM0_level2_quad_clean.evt
Size (bytes)1,220,382,720181,108,800
Size1.1 GB 172.7 MB
Events in quadrant A7,366,8761,143,939
Events in quadrant B7,414,4321,168,496
Events in quadrant C6,840,6081,139,055
Events in quadrant D14,358,6081,032,495

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0315033
B0311563
C0297733
D0525553

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02960
B02960
C02960
D02960

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A040
B040
C040
D040

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A144914112.836243%
B144923602.484129%
C144923772.601435%
D14492219115.118686%

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 14946 14493 93 93 0.62% 0.64%
B 14947 14494 30 30 0.20% 0.21%
C 14947 14495 0 0 0.00% 0.00%
D 14947 14495 1667 1667 11.15% 11.50%

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 5 16 570686 1603.29 1745 1707 354.9
A 13 252 64121 175.87 1745 1707 354.9
A 13 254 21053 54.51 1745 1707 354.9
B 3 64 150354 445.67 1748 1703 333.5
B 0 197 134058 396.82 1748 1703 333.5
B 0 189 89610 263.55 1748 1703 333.5
C 14 238 261245 656.94 1681 1694 395.1
C 7 220 17728 40.58 1681 1694 395.1
C 3 233 13125 28.93 1681 1694 395.1
D 13 174 2595412 6623.89 1609 1566 391.6
D 1 239 2047186 5223.89 1609 1566 391.6
D 5 222 990430 2525.26 1609 1566 391.6

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