ASTROSAT CZTI

Data Quality Report

Orbit 56873

Creation date: 2026-04-02T21:58:50.059998
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_083T03_9000006562_56873cztM0_level2.fits modeM0/AS1A14_083T03_9000006562_56873cztM0_level2_quad_clean.evt
Size (bytes)463,484,160102,242,880
Size442.0 MB 97.5 MB
Events in quadrant A3,270,097692,342
Events in quadrant B5,199,765663,754
Events in quadrant C4,161,856633,302
Events in quadrant D3,990,869628,352

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A050
B050
C050
D050

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01380
B01380
C01380
D01380

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0151081
B0201331
C0174242
D0169561

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6867701.019368%
B686770110.208242%
C68672824.106597%
D68671642.388234%

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 7317 6867 7 7 0.10% 0.10%
B 7317 6867 571 571 7.80% 8.32%
C 7317 6868 293 293 4.00% 4.27%
D 7317 6868 167 167 2.28% 2.43%

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 3 14 262911 1410.24 749 731 185.9
A 4 13 32905 173.06 749 731 185.9
A 10 251 20126 104.32 749 731 185.9
B 5 185 1478055 9941.41 687 664 148.6
B 10 16 611698 4111.67 687 664 148.6
B 0 197 216893 1455.01 687 664 148.6
C 13 3 1013719 5159.7 707 700 196.3
C 1 16 133038 674.05 707 700 196.3
C 14 254 80875 408.36 707 700 196.3
D 8 240 394304 1898.68 719 685 207.3
D 2 249 273472 1315.83 719 685 207.3
D 2 31 232993 1120.57 719 685 207.3

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