ASTROSAT CZTI

Data Quality Report

Orbit 51931

Creation date: 2025-05-05T08:11:43.537308
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/AS1C09_011T05_9000006466_51931cztM0_level2.fits modeM0/AS1C09_011T05_9000006466_51931cztM0_level2_quad_clean.evt
Size (bytes)1,035,400,32067,936,320
Size987.4 MB 64.8 MB
Events in quadrant A7,829,806523,819
Events in quadrant B11,012,179316,839
Events in quadrant C9,588,112401,706
Events in quadrant D9,406,511369,937

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01300
B01300
C01300
D01300

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0277371
B0370881
C0328881
D0323521

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0120
B0120
C0120
D0120

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A636198815.532149%
B6360380159.764151%
C6361242238.075774%
D6361231936.456532%

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 7541 6361 903 903 11.97% 14.20%
B 7540 6361 2878 2878 38.17% 45.24%
C 7541 6361 2215 2215 29.37% 34.82%
D 7541 6362 2354 2354 31.22% 37.00%

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 12 3 1795022 11556.9 613 599 155.3
A 7 64 1279055 8233.84 613 599 155.3
A 4 175 679252 4370.83 613 599 155.3
B 12 32 7925330 85145.16 438 424 93.1
B 4 171 246374 2642.49 438 424 93.1
B 4 206 224722 2409.86 438 424 93.1
C 15 224 5354344 35963.12 526 523 148.9
C 0 193 655067 4396.76 526 523 148.9
C 15 230 339450 2276.67 526 523 148.9
D 6 42 5287835 34630.58 524 499 152.7
D 12 17 1098339 7190.55 524 499 152.7
D 3 12 377409 2468.66 524 499 152.7

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