ASTROSAT CZTI

Data Quality Report

Orbit 20190222_A05_227T06_9000002730_level2

Creation date: 2025-11-27T23:28:30.708467
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/AS1A05_227T06_9000002730cztM0_level2.fits modeM0/AS1A05_227T06_9000002730cztM0_level2_quad_clean.evt
Size (bytes)228,749,760190,200,960
Size218.2 MB 181.4 MB
Events in quadrant A1,438,7861,103,511
Events in quadrant B1,365,0201,105,139
Events in quadrant C1,386,1121,051,138
Events in quadrant D1,196,368957,924

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A04520
B04520
C04520
D04520

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0476400
B0575920
C0469840
D0571840

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0530
B0530
C0530
D0530

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A224112531.128910%
B224118183.649993%
C224112180.972737%
D224115102.275668%

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 27552 22411 0 0 0.00% 0.00%
B 27552 22409 0 0 0.00% 0.00%
C 27552 22411 0 0 0.00% 0.00%
D 27551 22406 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 1431 11.64 374 353 92.6
A 7 110 1200 9.14 374 353 92.6
A 0 30 1188 9.01 374 353 92.6
B 2 9 1129 10.83 361 347 72.2
B 2 8 971 8.65 361 347 72.2
B 3 17 895 7.59 361 347 72.2
C 1 81 1112 8.09 366 344 94.9
C 1 80 1111 8.08 366 344 94.9
C 1 65 949 6.37 366 344 94.9
D 4 246 958 7.08 341 311 91.4
D 3 14 924 6.7 341 311 91.4
D 6 231 893 6.36 341 311 91.4

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