ASTROSAT CZTI

Data Quality Report

Orbit 55027

Creation date: 2025-12-01T12:25:13.496117
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/AS1A14_025T01_9000006530_55027cztM0_level2.fits modeM0/AS1A14_025T01_9000006530_55027cztM0_level2_quad_clean.evt
Size (bytes)1,790,953,920168,583,680
Size1.7 GB 160.8 MB
Events in quadrant A17,279,2871,098,012
Events in quadrant B7,697,1681,487,223
Events in quadrant C7,996,7531,333,005
Events in quadrant D32,175,678162,381

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0685556980
B0386034629
C0392614238
D012530619862

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A034139
B034438
C034440
D034436

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0270
B0270
C0270
D0270

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A14821333522.501855%
B150134583.050689%
C150453582.379528%
D143621270088.427796%

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 44655 15306 3032 3032 6.79% 19.81%
B 44654 15438 265 265 0.59% 1.72%
C 44655 15461 236 236 0.53% 1.53%
D 44627 14714 10259 10259 22.99% 69.72%

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 32 6537938 18627.0 1408 1372 350.9
A 12 115 2737568 7797.23 1408 1372 350.9
A 0 250 1739459 4952.96 1408 1372 350.9
B 0 183 422747 1252.69 1571 1515 336.3
B 10 245 292173 864.38 1571 1515 336.3
B 5 185 250741 741.16 1571 1515 336.3
C 4 5 1087110 2524.27 1557 1541 430.1
C 1 16 246890 570.51 1557 1541 430.1
C 13 3 230022 531.29 1557 1541 430.1
D 15 94 23332889 146260.73 546 518 159.5
D 11 129 5301217 33227.83 546 518 159.5
D 10 181 408600 2558.09 546 518 159.5

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