ASTROSAT CZTI

Data Quality Report

Orbit 27521

Creation date: 2024-06-27T19:40:57.197350
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/AS1T03_249T01_9000003934_27521cztM0_level2.evt modeM0/AS1T03_249T01_9000003934_27521cztM0_level2_quad_clean.evt
Size (bytes)543,061,44092,980,800
Size517.9 MB 88.7 MB
Events in quadrant A3,550,503591,368
Events in quadrant B3,632,469594,158
Events in quadrant C3,559,794564,640
Events in quadrant D5,209,513558,406

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0151610
B0152560
C0151570
D0202890

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A72772593.559159%
B72782763.792251%
C72782994.108272%
D72785076.966200%

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 7292 7277 0 0 0.00% 0.00%
B 7293 7278 2 2 0.03% 0.03%
C 7293 7278 0 0 0.00% 0.00%
D 7293 7278 261 261 3.58% 3.59%

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 12135 60.18 919 897 186.7
A 3 137 9006 43.42 919 897 186.7
A 0 226 7958 37.81 919 897 186.7
B 0 230 37325 206.5 904 879 176.5
B 15 32 26977 147.87 904 879 176.5
B 12 111 22204 120.83 904 879 176.5
C 14 238 136192 645.06 875 880 209.8
C 2 16 8691 37.24 875 880 209.8
C 13 61 5878 23.83 875 880 209.8
D 1 52 1492609 6989.4 880 856 213.4
D 2 250 122721 570.98 880 856 213.4
D 11 176 94662 439.51 880 856 213.4

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