ASTROSAT CZTI

Data Quality Report

Orbit 52937

Creation date: 2025-07-17T06:25:10.540621
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/AS1A13_003T01_9000006486_52937cztM0_level2.fits modeM0/AS1A13_003T01_9000006486_52937cztM0_level2_quad_clean.evt
Size (bytes)1,047,772,80071,637,120
Size999.2 MB 68.3 MB
Events in quadrant A17,258,69715,983
Events in quadrant B3,705,060709,334
Events in quadrant C5,087,243593,024
Events in quadrant D12,198,630367,874

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0558981
B0158272
C0199811
D0410411

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01380
B01380
C01380
D01380

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6925681998.469314%
B69252113.046931%
C69254206.064982%
D6925311244.938628%

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 6939 6924 6218 6218 89.61% 89.80%
B 6940 6926 46 46 0.66% 0.66%
C 6940 6926 306 306 4.41% 4.42%
D 6940 6926 2549 2549 36.73% 36.80%

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 9 191 15665089 220827.88 280 273 70.9
A 4 238 103020 1448.43 280 273 70.9
A 5 241 96300 1353.7 280 273 70.9
B 10 254 208221 1298.68 753 727 159.8
B 1 239 143198 891.71 753 727 159.8
B 4 81 74464 461.51 753 727 159.8
C 9 38 465636 2364.52 723 716 196.6
C 7 80 444675 2257.92 723 716 196.6
C 1 109 424201 2153.79 723 716 196.6
D 15 78 3833226 21611.9 622 594 177.3
D 6 42 2971338 16751.78 622 594 177.3
D 8 176 1655407 9331.35 622 594 177.3

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