ASTROSAT CZTI

Data Quality Report

Orbit 27940

Creation date: 2024-06-27T19:46:14.273756
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/AS1A10_016T01_9000004034_27940cztM0_level2.evt modeM0/AS1A10_016T01_9000004034_27940cztM0_level2_quad_clean.evt
Size (bytes)543,349,44078,788,160
Size518.2 MB 75.1 MB
Events in quadrant A3,435,829485,788
Events in quadrant B3,629,035489,482
Events in quadrant C4,228,072462,857
Events in quadrant D4,692,897465,132

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0144110
B0150080
C0166840
D0188400

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A040
B040
C040
D040

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6925921.328520%
B69261522.194629%
C69263364.851285%
D69262503.609587%

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 7330 6926 0 0 0.00% 0.00%
B 7331 6926 8 8 0.11% 0.12%
C 7331 6927 172 172 2.35% 2.48%
D 7331 6927 126 126 1.72% 1.82%

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 13 254 11538 59.49 889 872 179.3
A 3 137 8570 42.93 889 872 179.3
A 0 226 7515 37.05 889 872 179.3
B 0 230 66164 386.53 878 857 169.0
B 10 245 39217 227.04 878 857 169.0
B 0 229 23217 132.34 878 857 169.0
C 2 16 707622 3586.8 844 850 197.0
C 14 238 134949 680.54 844 850 197.0
C 3 233 85677 430.49 844 850 197.0
D 8 195 506248 2441.46 856 832 207.0
D 2 250 367584 1771.63 856 832 207.0
D 7 80 290741 1400.43 856 832 207.0

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