ASTROSAT CZTI

Data Quality Report

Orbit 01831

Creation date: 2024-06-27T14:12:59.647845
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/AS1G02_021T08_9000000302_01831cztM0_level2.evt modeM0/AS1G02_021T08_9000000302_01831cztM0_level2_quad_clean.evt
Size (bytes)1,145,361,60080,752,320
Size1.1 GB 77.0 MB
Events in quadrant A8,547,605489,239
Events in quadrant B9,379,898494,401
Events in quadrant C8,287,492490,053
Events in quadrant D8,003,960479,095

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A010
B110
C1-1-1
D1-1-1

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0304062
B03288711
C0296942
D0288392

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01420
B01420
C01420
D01420

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A7069110.155609%
B7067270.382057%
C7069140.198048%
D70691311.853162%

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 7734 7070 252 252 3.26% 3.56%
B 7734 7069 449 449 5.81% 6.35%
C 7734 7070 204 204 2.64% 2.89%
D 7734 7070 294 294 3.80% 4.16%

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 15 236 8591 11.74 2231 2244 540.8
A 10 2 8182 10.98 2231 2244 540.8
A 12 189 4977 5.05 2231 2244 540.8
B 8 3 451982 814.43 2325 2334 552.1
B 0 234 70768 123.95 2325 2334 552.1
B 4 174 13354 19.96 2325 2334 552.1
C 9 236 10550 14.03 2120 2197 595.2
C 7 159 5951 6.31 2120 2197 595.2
C -1 -1 -1 -1.0 2120 2197 595.2
D 13 53 315800 496.69 2023 2097 631.6
D 7 85 53813 81.88 2023 2097 631.6
D 1 83 53652 81.63 2023 2097 631.6

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