ASTROSAT CZTI

Data Quality Report

Orbit 20180508_A04_149T01_9000002082_level2

Creation date: 2025-11-22T06:24:00.525850
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_9000002082cztM0_level2.fits modeM0/AS1A04_149T01_9000002082cztM0_level2_quad_clean.evt
Size (bytes)623,105,280751,193,280
Size594.2 MB 716.4 MB
Events in quadrant A3,857,8704,900,538
Events in quadrant B3,558,8664,600,696
Events in quadrant C3,740,8484,577,809
Events in quadrant D3,245,6764,207,494

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A013240
B013240
C013240
D013240

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01358660
B01736910
C01363470
D01544840

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0970
B0970
C0970
D0970

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A651206571.008907%
B6512051297.876229%
C651205490.843059%
D6512013042.002457%

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 74750 65118 0 0 0.00% 0.00%
B 74750 65006 0 0 0.00% 0.00%
C 74750 65119 0 0 0.00% 0.00%
D 74750 65108 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 3668 10.9 1004 944 249.9
A 7 110 3100 8.63 1004 944 249.9
A 9 19 2951 8.03 1004 944 249.9
B 2 9 2973 11.51 938 900 180.1
B 14 254 2471 8.72 938 900 180.1
B 5 128 2417 8.42 938 900 180.1
C 1 80 2785 7.46 986 923 249.7
C 1 81 2785 7.46 986 923 249.7
C 12 241 2739 7.27 986 923 249.7
D 6 231 2383 6.33 925 847 242.5
D 3 14 2376 6.31 925 847 242.5
D 10 189 2278 5.9 925 847 242.5

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