ASTROSAT CZTI

Data Quality Report

Orbit 20151124_P01_156T01_9000000118_level2

Creation date: 2025-10-23T17:41:47.540895
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/AS1P01_156T01_9000000118cztM0_level2.fits modeM0/AS1P01_156T01_9000000118cztM0_level2_quad_clean.evt
Size (bytes)309,015,360362,632,320
Size294.7 MB 345.8 MB
Events in quadrant A1,787,5682,214,119
Events in quadrant B1,765,8202,202,965
Events in quadrant C1,779,0862,131,333
Events in quadrant D1,532,6341,941,233

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A07380
B07380
C07380
D07380

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0520
B0520
C0520
D0520

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01566500
B01674800
C01544070
D01508800

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A362963450.950518%
B362965731.578686%
C362963200.881640%
D362964951.363787%

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 40475 36289 0 0 0.00% 0.00%
B 40475 36292 0 0 0.00% 0.00%
C 40475 36290 0 0 0.00% 0.00%
D 40475 36290 0 0 0.00% 0.00%

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 7 110 1674 11.28 462 431 110.1
A 0 29 1573 10.36 462 431 110.1
A 14 188 1353 8.37 462 431 110.1
B 2 9 1429 11.09 466 440 89.1
B 14 254 1188 8.39 466 440 89.1
B 5 225 1125 7.68 466 440 89.1
C 2 191 1180 6.36 469 431 117.8
C 12 241 1163 6.21 469 431 117.8
C 1 81 1148 6.08 469 431 117.8
D 1 19 1220 7.89 436 399 104.1
D 1 3 1117 6.9 436 399 104.1
D 6 231 1085 6.59 436 399 104.1

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