ASTROSAT CZTI

Data Quality Report

Orbit 20210822_T04_044T01_9000004652_level2

Creation date: 2025-12-28T09:47:06.852229
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/AS1T04_044T01_9000004652cztM0_level2.fits modeM0/AS1T04_044T01_9000004652cztM0_level2_quad_clean.evt
Size (bytes)144,319,680122,460,480
Size137.6 MB 116.8 MB
Events in quadrant A926,826754,407
Events in quadrant B844,010686,477
Events in quadrant C835,200629,459
Events in quadrant D780,574653,643

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02960
B02940
C02960
D02960

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0250
B0250
C0250
D0250

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0296230
B0487230
C0456470
D0368350

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A14275880.616462%
B141389536.740699%
C1422913009.136271%
D142501531.073684%

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 17297 14334 0 0 0.00% 0.00%
B 17298 14188 0 0 0.00% 0.00%
C 17298 14266 0 0 0.00% 0.00%
D 17298 14303 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 0 29 869 10.59 241 227 60.6
A 7 110 748 8.59 241 227 60.6
A 9 19 702 7.83 241 227 60.6
B 2 9 669 9.99 223 214 45.5
B 5 128 585 8.15 223 214 45.5
B 5 232 583 8.1 223 214 45.5
C 1 81 644 7.58 221 206 57.8
C 1 80 600 6.82 221 206 57.8
C 3 187 577 6.42 221 206 57.8
D 7 3 597 6.52 222 203 60.5
D 15 47 570 6.07 222 203 60.5
D 10 189 568 6.04 222 203 60.5

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