ASTROSAT CZTI

Data Quality Report

Orbit 53508

Creation date: 2025-08-19T12:24:12.952455
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_002T07_9000006498_53508cztM0_level2.fits modeM0/AS1A14_002T07_9000006498_53508cztM0_level2_quad_clean.evt
Size (bytes)1,529,599,680131,544,000
Size1.4 GB 125.5 MB
Events in quadrant A23,786,823429,228
Events in quadrant B5,932,2441,182,237
Events in quadrant C19,207,334614,586
Events in quadrant D6,792,478947,683

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02390
B02411
C02400
D02413

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0131
B0120
C0120
D0131

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0798001174
B026126223
C066078862
D029263208

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A11640759565.249141%
B117061781.520588%
C11669516944.296855%
D117124613.936134%

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 12934 11706 6459 6459 49.94% 55.18%
B 12970 11738 21 21 0.16% 0.18%
C 12950 11719 4370 4370 33.75% 37.29%
D 12962 11737 339 339 2.62% 2.89%

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 62 13324513 66360.98 816 797 200.8
A 3 63 3956508 19702.07 816 797 200.8
A 15 174 3151175 15690.98 816 797 200.8
B 10 254 366357 1387.43 1237 1193 263.2
B 10 28 100617 377.76 1237 1193 263.2
B 5 185 93510 350.76 1237 1193 263.2
C 7 64 12386886 47800.59 947 943 259.1
C 15 224 1165896 4495.86 947 943 259.1
C 15 182 381599 1469.05 947 943 259.1
D 8 208 790938 2314.18 1195 1143 341.3
D 13 153 293637 857.04 1195 1143 341.3
D 2 249 263485 768.69 1195 1143 341.3

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