ASTROSAT CZTI

Data Quality Report

Orbit 21157

Creation date: 2024-06-27T18:24:16.867276
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/AS1C04_001T01_9000003126_21157cztM0_level2.evt modeM0/AS1C04_001T01_9000003126_21157cztM0_level2_quad_clean.evt
Size (bytes)1,706,120,640343,779,840
Size1.6 GB 327.9 MB
Events in quadrant A8,883,6952,432,187
Events in quadrant B9,715,3292,444,955
Events in quadrant C8,881,5842,345,879
Events in quadrant D22,902,8831,874,671

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0330
B0330
C0330
D0330

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0393774
B0411204
C0390014
D0810464

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03860
B03860
C03860
D03860

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A190752151.127130%
B190751900.996068%
C190752131.116645%
D19075528127.685452%

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 22275 19078 21 21 0.09% 0.11%
B 22275 19079 17 17 0.08% 0.09%
C 22275 19079 0 0 0.00% 0.00%
D 22275 19077 4614 4614 20.71% 24.19%

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 123029 264.93 2267 2214 456.0
A 13 254 24331 48.5 2267 2214 456.0
A 13 252 20175 39.39 2267 2214 456.0
B 0 189 305772 722.05 2259 2203 420.4
B 0 229 130308 304.7 2259 2203 420.4
B 0 190 126913 296.63 2259 2203 420.4
C 14 238 341975 672.07 2175 2182 505.6
C 3 233 51762 98.06 2175 2182 505.6
C 13 61 15211 25.77 2175 2182 505.6
D 1 239 13973549 31229.42 1858 1797 447.4
D 7 238 642686 1432.5 1858 1797 447.4
D 1 20 306528 681.13 1858 1797 447.4

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