ASTROSAT CZTI

Data Quality Report

Orbit 20200115_A08_004T02_9000003436_level2

Creation date: 2025-12-08T06:21:40.850857
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/AS1A08_004T02_9000003436cztM0_level2.fits modeM0/AS1A08_004T02_9000003436cztM0_level2_quad_clean.evt
Size (bytes)313,107,840351,069,120
Size298.6 MB 334.8 MB
Events in quadrant A1,936,3962,204,632
Events in quadrant B1,848,3342,203,760
Events in quadrant C1,846,7222,084,386
Events in quadrant D1,626,4441,915,329

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A06560
B06560
C06560
D06560

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0672690
B0676760
C0766270
D0801950

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0520
B0520
C0520
D0520

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A323833000.926412%
B323834101.266096%
C3238310533.251706%
D323838822.723651%

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 37463 32378 0 0 0.00% 0.00%
B 37463 32377 0 0 0.00% 0.00%
C 37463 32377 0 0 0.00% 0.00%
D 37463 32377 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 1827 10.77 504 475 125.5
A 9 19 1522 8.34 504 475 125.5
A 7 110 1500 8.17 504 475 125.5
B 2 9 1473 10.35 489 470 96.9
B 2 8 1293 8.49 489 470 96.9
B 5 128 1186 7.39 489 470 96.9
C 12 241 1329 7.03 487 458 123.9
C 2 191 1273 6.58 487 458 123.9
C 9 209 1262 6.49 487 458 123.9
D 3 14 1244 6.63 464 423 123.8
D 6 231 1143 5.82 464 423 123.8
D 15 46 1113 5.57 464 423 123.8

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