ASTROSAT CZTI

Data Quality Report

Orbit 51987

Creation date: 2025-05-09T01:14:52.816688
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/AS1C09_011T06_9000006468_51987cztM0_level2.fits modeM0/AS1C09_011T06_9000006468_51987cztM0_level2_quad_clean.evt
Size (bytes)867,159,36076,942,080
Size827.0 MB 73.4 MB
Events in quadrant A6,132,877537,947
Events in quadrant B5,401,930633,120
Events in quadrant C6,086,777528,821
Events in quadrant D13,989,129187,944

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0225941
B0204741
C0226213
D0458471

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0110
B0110
C0110
D0110

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01300
B01300
C01300
D01300

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A631996915.334705%
B63204957.832278%
C631992914.701693%
D6319457072.321570%

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 7434 6320 723 723 9.73% 11.44%
B 7434 6320 324 324 4.36% 5.13%
C 7434 6320 753 753 10.13% 11.91%
D 7434 6319 4258 4258 57.28% 67.38%

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 7 64 2510717 15817.5 630 614 158.7
A 2 48 288558 1814.49 630 614 158.7
A 4 3 173962 1092.36 630 614 158.7
B 10 128 613981 4442.42 656 635 138.1
B 4 206 473413 3424.29 656 635 138.1
B 4 171 401850 2905.97 656 635 138.1
C 15 224 2147294 12553.79 623 620 171.0
C 15 147 360482 2104.48 623 620 171.0
C 9 38 280781 1638.39 623 620 171.0
D 2 172 4301512 31918.85 464 443 134.8
D 6 42 3503997 26000.38 464 443 134.8
D 12 17 2280323 16919.32 464 443 134.8

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