ASTROSAT CZTI

Data Quality Report

Orbit 50871

Creation date: 2025-02-22T21:12:10.660282
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/AS1C07_001T01_9000006450_50871cztM0_level2.fits modeM0/AS1C07_001T01_9000006450_50871cztM0_level2_quad_clean.evt
Size (bytes)551,759,04084,758,400
Size526.2 MB 80.8 MB
Events in quadrant A6,316,720532,225
Events in quadrant B3,266,880623,620
Events in quadrant C4,729,639519,333
Events in quadrant D5,654,100479,152

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01180
B01180
C01180
D01180

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0230041
B0137491
C0179561
D0207751

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0110
B0110
C0110
D0110

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A589574112.569975%
B58962003.392130%
C58965539.379240%
D589666211.227951%

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 7009 5894 517 517 7.38% 8.77%
B 7010 5895 45 45 0.64% 0.76%
C 7010 5895 428 428 6.11% 7.26%
D 7010 5895 586 586 8.36% 9.94%

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 4 4 1846522 11917.36 621 606 154.9
A 4 249 574793 3706.99 621 606 154.9
A 7 206 517838 3339.29 621 606 154.9
B 4 81 184281 1366.48 637 615 134.4
B 4 206 183315 1359.3 637 615 134.4
B 0 213 70967 523.42 637 615 134.4
C 1 29 666681 4055.46 609 604 164.2
C 3 233 339855 2065.56 609 604 164.2
C 15 229 246617 1497.87 609 604 164.2
D 2 216 924081 5471.58 603 580 168.8
D 2 249 508077 3006.83 603 580 168.8
D 10 24 504159 2983.62 603 580 168.8

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