ASTROSAT CZTI

Data Quality Report

Orbit 00836

Creation date: 2024-06-27T14:03:35.999143
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/AS1P01_156T01_9000000114_00836cztM0_level2.evt modeM0/AS1P01_156T01_9000000114_00836cztM0_level2_quad_clean.evt
Size (bytes)1,723,795,20080,818,560
Size1.6 GB 77.1 MB
Events in quadrant A12,657,001435,554
Events in quadrant B13,285,650435,286
Events in quadrant C12,453,889431,603
Events in quadrant D13,111,170413,485

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02160
B02160
C02160
D02160

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0200
B0200
C0200
D0200

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0450800
B0468870
C0444770
D0464930

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A10551750.710833%
B105511030.976211%
C10552860.815011%
D105524304.075057%

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 12581 10551 372 372 2.96% 3.53%
B 12582 10552 448 448 3.56% 4.25%
C 12582 10552 308 308 2.45% 2.92%
D 12582 10552 936 936 7.44% 8.87%

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 15 127 152585 190.49 3248 3272 783.8
A 15 233 16133 16.41 3248 3272 783.8
A 11 79 12884 12.26 3248 3272 783.8
B 0 220 97605 118.7 3397 3419 793.5
B 2 2 85935 104.0 3397 3419 793.5
B 15 22 44268 51.48 3397 3419 793.5
C 9 83 55133 59.68 3124 3245 869.4
C 7 87 50641 54.52 3124 3245 869.4
C 3 111 44676 47.65 3124 3245 869.4
D 7 70 1361815 1482.87 2957 3056 916.3
D 13 200 214481 230.74 2957 3056 916.3
D 13 169 95653 101.05 2957 3056 916.3

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