ASTROSAT CZTI

Data Quality Report

Orbit 20870

Creation date: 2024-06-27T18:20:32.334395
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/AS1A05_160T01_9000003078_20870cztM0_level2.evt modeM0/AS1A05_160T01_9000003078_20870cztM0_level2_quad_clean.evt
Size (bytes)3,872,450,880480,234,240
Size3.6 GB 458.0 MB
Events in quadrant A18,077,3793,186,156
Events in quadrant B18,855,9333,263,827
Events in quadrant C18,575,3233,021,948
Events in quadrant D59,189,7512,436,299

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0540
B0540
C0540
D0540

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A079613852
B081226878
C080545853
D02048892567

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A079212
B07926
C07924
D07924

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A383812650.690446%
B383753720.969381%
C383825621.464228%
D382201292533.817373%

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 44236 38544 0 0 0.00% 0.00%
B 44237 38539 15 15 0.03% 0.04%
C 44237 38575 56 56 0.13% 0.15%
D 44237 38371 12267 12267 27.73% 31.97%

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 0 226 40001 37.66 4699 4603 939.9
A 3 137 39536 37.17 4699 4603 939.9
A 12 194 32671 29.86 4699 4603 939.9
B 0 189 205487 227.21 4687 4582 884.2
B 12 111 110941 120.29 4687 4582 884.2
B 11 111 97845 105.47 4687 4582 884.2
C 14 238 700956 673.25 4459 4496 1034.5
C 3 233 227426 215.5 4459 4496 1034.5
C 0 10 171095 161.05 4459 4496 1034.5
D 1 52 32599176 35166.37 3866 3761 926.9
D 1 239 6564765 7078.5 3866 3761 926.9
D 1 20 4004238 4316.01 3866 3761 926.9

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