ASTROSAT CZTI

Data Quality Report

Orbit 31541

Creation date: 2024-06-27T20:29:44.728447
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_056T01_9000004598_31541cztM0_level2.evt modeM0/AS1A10_056T01_9000004598_31541cztM0_level2_quad_clean.evt
Size (bytes)1,716,361,920342,552,960
Size1.6 GB 326.7 MB
Events in quadrant A9,836,4732,282,851
Events in quadrant B16,340,2472,319,292
Events in quadrant C10,659,1232,231,943
Events in quadrant D13,758,8412,125,442

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0429254
B0635714
C0449786
D0549045

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0490
B0490
C0490
D0490

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A04200
B04200
C04200
D04200

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A20571860.418064%
B205713381.643090%
C205704272.075839%
D205716753.281318%

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 25501 20574 0 0 0.00% 0.00%
B 25501 20572 25 25 0.10% 0.12%
C 25501 20572 92 92 0.36% 0.45%
D 25501 20574 437 437 1.71% 2.12%

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 35898 67.06 2545 2499 498.1
A 3 137 24893 44.96 2545 2499 498.1
A 0 226 21189 37.53 2545 2499 498.1
B 6 159 5712194 12094.46 2554 2497 472.1
B 4 80 403685 849.81 2554 2497 472.1
B 0 190 78176 160.31 2554 2497 472.1
C 14 238 405524 707.89 2468 2486 569.3
C 0 10 274856 478.39 2468 2486 569.3
C 3 233 168351 291.32 2468 2486 569.3
D 8 195 2945600 5101.42 2436 2372 576.9
D 13 249 785781 1357.86 2436 2372 576.9
D 12 218 524666 905.28 2436 2372 576.9

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