ASTROSAT CZTI

Data Quality Report

Orbit 35840

Creation date: 2022-06-08T16:57:08.483158
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/AS1A11_080T01_9000005146_35840cztM0_level2.evt modeM0/AS1A11_080T01_9000005146_35840cztM0_level2_quad_clean.evt
Size (bytes)494,651,52063,480,960
Size471.7 MB 60.5 MB
Events in quadrant A3,678,015403,593
Events in quadrant B3,104,237403,276
Events in quadrant C4,017,985372,243
Events in quadrant D3,821,648372,196

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0210
B0210
C0210
D0220

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01080
B01080
C01080
D01080

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0142873
B0123382
C0150162
D0148392

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A52921412.664399%
B5292520.982615%
C52923797.161754%
D52921813.420257%

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 7325 5293 111 111 1.52% 2.10%
B 7325 5293 25 25 0.34% 0.47%
C 7325 5293 363 363 4.96% 6.86%
D 7325 5293 163 163 2.23% 3.08%

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 15 169 747485 5264.49 711 701 141.9
A 10 83 158437 1111.97 711 701 141.9
A 13 6 14995 100.77 711 701 141.9
B 0 213 114496 863.76 697 683 131.8
B 5 172 100289 755.94 697 683 131.8
B 4 232 59418 445.76 697 683 131.8
C 15 208 763447 5115.67 649 658 149.1
C 0 10 488037 3268.62 649 658 149.1
C 15 214 216655 1448.59 649 658 149.1
D 7 223 293102 1796.74 678 663 162.8
D 13 249 283241 1736.16 678 663 162.8
D 2 250 184307 1128.31 678 663 162.8

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