ASTROSAT CZTI

Data Quality Report

Orbit 20210921_A09_131T01_9000004702_level2

Creation date: 2025-12-29T06:20:42.342115
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/AS1A09_131T01_9000004702cztM0_level2.fits modeM0/AS1A09_131T01_9000004702cztM0_level2_quad_clean.evt
Size (bytes)1,456,545,6001,824,295,680
Size1.4 GB 1.7 GB
Events in quadrant A9,080,75211,830,057
Events in quadrant B8,345,33211,467,970
Events in quadrant C8,630,98811,161,867
Events in quadrant D7,672,17010,426,708

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03354540
B05367670
C04145490
D04617930

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A030800
B030800
C030800
D030800

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02470
B02470
C02470
D02470

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A15133040292.662393%
B151330133008.788740%
C151330142439.411881%
D15133082545.454305%

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 175810 150778 0 0 0.00% 0.00%
B 175809 151244 0 0 0.00% 0.00%
C 175810 151084 0 0 0.00% 0.00%
D 175810 151190 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 8952 11.63 2370 2241 577.1
A 7 110 7299 8.76 2370 2241 577.1
A 0 30 7041 8.32 2370 2241 577.1
B 2 9 6794 10.82 2215 2123 431.7
B 3 80 5761 8.43 2215 2123 431.7
B 2 8 5596 8.04 2215 2123 431.7
C 12 241 6009 6.73 2288 2157 571.9
C 3 187 5926 6.59 2288 2157 571.9
C 3 126 5915 6.57 2288 2157 571.9
D 10 189 5877 6.67 2198 2009 580.3
D 3 14 5555 6.11 2198 2009 580.3
D 6 67 5529 6.07 2198 2009 580.3

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