ASTROSAT CZTI

Data Quality Report

Orbit 20180224_A04_149T01_9000001918_level2

Creation date: 2025-11-19T18:08:20.056800
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/AS1A04_149T01_9000001918cztM0_level2.fits modeM0/AS1A04_149T01_9000001918cztM0_level2_quad_clean.evt
Size (bytes)1,103,371,2001,082,111,040
Size1.0 GB 1.0 GB
Events in quadrant A6,805,9246,783,221
Events in quadrant B5,739,8965,363,937
Events in quadrant C6,881,3086,557,393
Events in quadrant D5,815,7345,907,438

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01930
B01930
C01930
D01930

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02597300
B03905660
C02440210
D03034740

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A024280
B024280
C024280
D024280

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A11907119821.664553%
B1190712447720.556643%
C11907112241.027958%
D11907150674.255444%

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 138377 119072 0 0 0.00% 0.00%
B 138377 114122 0 0 0.00% 0.00%
C 138377 119071 0 0 0.00% 0.00%
D 138377 119000 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 6537 11.14 1773 1663 437.4
A 7 110 5691 9.21 1773 1663 437.4
A 9 19 5081 7.81 1773 1663 437.4
B 2 9 4930 11.83 1514 1447 294.4
B 14 254 3781 7.93 1514 1447 294.4
B 5 128 3752 7.83 1514 1447 294.4
C 1 80 5217 7.64 1814 1696 460.7
C 1 81 5168 7.54 1814 1696 460.7
C 12 241 4790 6.72 1814 1696 460.7
D 6 231 4339 6.46 1658 1514 437.6
D 10 189 4152 6.03 1658 1514 437.6
D 3 14 4130 5.98 1658 1514 437.6

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