ASTROSAT CZTI

Data Quality Report

Orbit 20210226_A10_050T01_9000004212_level2

Creation date: 2025-12-20T21:06:16.402377
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/AS1A10_050T01_9000004212cztM0_level2.fits modeM0/AS1A10_050T01_9000004212cztM0_level2_quad_clean.evt
Size (bytes)1,021,181,760857,370,240
Size973.9 MB 817.7 MB
Events in quadrant A6,711,5925,236,939
Events in quadrant B6,277,1245,115,253
Events in quadrant C5,196,4083,928,869
Events in quadrant D5,307,4644,276,648

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01780
B01780
C01780
D01780

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02269570
B02567540
C05692220
D04276190

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A022020
B022020
C022020
D022020

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A10802212341.142360%
B10802239633.668697%
C1080214657243.113839%
D1080231628115.071790%

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 139482 108023 0 0 0.00% 0.00%
B 139482 107943 0 0 0.00% 0.00%
C 139482 107837 0 0 0.00% 0.00%
D 139482 107878 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 5529 9.25 1747 1640 420.3
A 7 110 5276 8.65 1747 1640 420.3
A 9 19 4955 7.89 1747 1640 420.3
B 2 9 5033 10.47 1663 1583 329.5
B 2 8 4204 7.95 1663 1583 329.5
B 3 17 4165 7.84 1663 1583 329.5
C 12 241 3662 6.76 1375 1288 351.4
C 3 187 3555 6.45 1375 1288 351.4
C 3 126 3470 6.21 1375 1288 351.4
D 15 46 4049 6.58 1520 1382 405.6
D 10 189 3797 5.95 1520 1382 405.6
D 3 14 3774 5.9 1520 1382 405.6

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