ASTROSAT CZTI

Data Quality Report

Orbit 20200915_A09_145T01_9000003870_level2

Creation date: 2025-12-15T01:42:35.559417
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_145T01_9000003870cztM0_level2.fits modeM0/AS1A09_145T01_9000003870cztM0_level2_quad_clean.evt
Size (bytes)125,112,96048,551,040
Size119.3 MB 46.3 MB
Events in quadrant A807,208191,104
Events in quadrant B736,722125,023
Events in quadrant C786,736185,744
Events in quadrant D658,472167,493

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02360
B02360
C02360
D02360

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0380
B0380
C0380
D0380

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0269670
B0354170
C0249750
D0325200

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A115571791.548845%
B11557187316.206628%
C115571551.341179%
D115578737.553863%

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 14167 11557 0 0 0.00% 0.00%
B 14166 11555 0 0 0.00% 0.00%
C 14167 11557 0 0 0.00% 0.00%
D 14167 11525 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 29 665 8.68 210 199 53.7
A 7 110 617 7.78 210 199 53.7
A 9 19 596 7.39 210 199 53.7
B 2 9 573 9.73 195 188 39.6
B 2 8 511 8.16 195 188 39.6
B 3 17 486 7.53 195 188 39.6
C 1 81 632 8.07 207 195 54.1
C 1 80 593 7.35 207 195 54.1
C 3 126 547 6.5 207 195 54.1
D 15 46 508 6.52 188 173 51.4
D 3 14 471 5.8 188 173 51.4
D 10 189 461 5.6 188 173 51.4

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