ASTROSAT CZTI

Data Quality Report

Orbit 20210812_A10_059T02_9000004636_level2

Creation date: 2025-12-28T08:34:10.421874
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/AS1A10_059T02_9000004636cztM0_level2.fits modeM0/AS1A10_059T02_9000004636cztM0_level2_quad_clean.evt
Size (bytes)346,072,320255,833,280
Size330.0 MB 244.0 MB
Events in quadrant A1,847,5761,030,093
Events in quadrant B2,074,0221,448,859
Events in quadrant C2,049,4921,337,268
Events in quadrant D1,874,6361,302,855

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0390
B0400
C0410
D0370

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A07940
B07760
C08020
D08000

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01535560
B01243740
C01167200
D01028720

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A386441216031.466722%
B3849419865.159246%
C3780336909.761130%
D3782615264.034262%

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 41358 37079 0 0 0.00% 0.00%
B 41358 37459 0 0 0.00% 0.00%
C 41358 36720 0 0 0.00% 0.00%
D 41358 36637 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 1601 9.68 481 453 118.6
A 7 110 1499 8.82 481 453 118.6
A 9 19 1377 7.79 481 453 118.6
B 2 9 1707 10.76 550 525 109.8
B 2 8 1439 8.32 550 525 109.8
B 3 17 1402 7.98 550 525 109.8
C 12 241 1466 7.0 543 508 136.9
C 3 187 1445 6.84 543 508 136.9
C 9 209 1428 6.72 543 508 136.9
D 3 14 1395 6.37 535 486 142.6
D 15 47 1362 6.14 535 486 142.6
D 6 67 1312 5.79 535 486 142.6

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