ASTROSAT CZTI

Data Quality Report

Orbit 26845

Creation date: 2024-06-27T19:33:36.253652
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_224T01_9000003868_26845cztM0_level2.evt modeM0/AS1T03_224T01_9000003868_26845cztM0_level2_quad_clean.evt
Size (bytes)584,553,60082,149,120
Size557.5 MB 78.3 MB
Events in quadrant A3,964,546532,517
Events in quadrant B5,376,383514,599
Events in quadrant C3,013,631528,798
Events in quadrant D4,920,745470,285

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0160180
B0198970
C0130480
D0188970

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A090
B090
C090
D090

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6316610.965801%
B631771211.271173%
C6317600.949818%
D631764910.273864%

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 7206 6317 38 38 0.53% 0.60%
B 7207 6318 643 643 8.92% 10.18%
C 7207 6318 6 6 0.08% 0.09%
D 7207 6318 531 531 7.37% 8.40%

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 13 1060160 6934.34 752 734 152.8
A 13 254 10362 63.02 752 734 152.8
A 3 137 7126 41.84 752 734 152.8
B 0 189 2490054 17886.74 732 716 139.2
B 12 111 16919 116.42 732 716 139.2
B 11 111 14952 102.29 732 716 139.2
C 14 238 115111 668.01 723 727 171.2
C 15 208 71628 414.07 723 727 171.2
C 14 176 10543 57.33 723 727 171.2
D 1 52 1956405 11859.6 684 666 164.9
D 2 250 258903 1565.95 684 666 164.9
D 7 80 91514 550.9 684 666 164.9

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