ASTROSAT CZTI

Data Quality Report

Orbit 54837

Creation date: 2025-11-16T22:13:58.294160
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/AS1A14_039T06_9000006526_54837cztM0_level2.fits modeM0/AS1A14_039T06_9000006526_54837cztM0_level2_quad_clean.evt
Size (bytes)496,897,92096,500,160
Size473.9 MB 92.0 MB
Events in quadrant A3,146,193649,447
Events in quadrant B3,412,369697,648
Events in quadrant C3,914,782600,264
Events in quadrant D7,392,431501,592

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0130
B0130
C0140
D0140

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0143062
B0150602
C0165482
D0266112

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01380
B01380
C01380
D01380

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A67861572.313587%
B67861692.490421%
C67863284.833481%
D6786121017.830828%

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 7831 6788 17 17 0.22% 0.25%
B 7831 6788 23 23 0.29% 0.34%
C 7831 6787 171 171 2.18% 2.52%
D 7831 6788 1067 1067 13.63% 15.72%

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 13 248 78896 417.99 756 734 187.0
A 4 3 38002 199.3 756 734 187.0
A 3 14 21795 112.63 756 734 187.0
B 5 185 198691 1241.31 739 711 159.5
B 5 236 127109 792.5 739 711 159.5
B 10 247 126754 790.27 739 711 159.5
C 12 252 506184 2573.13 718 713 196.4
C 12 2 197854 1003.56 718 713 196.4
C 14 254 145745 738.29 718 713 196.4
D 11 176 1849939 9578.42 685 655 193.1
D 2 172 670411 3469.02 685 655 193.1
D 11 129 665629 3444.25 685 655 193.1

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