ASTROSAT CZTI

Data Quality Report

Orbit 20250520_C09_011T08_9000006472_level2

Creation date: 2025-07-17T12:00:16.827163
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_011T08_9000006472cztM0_level2.fits modeM0/AS1C09_011T08_9000006472cztM0_level2_quad_clean.evt
Size (bytes)886,135,680490,864,320
Size845.1 MB 468.1 MB
Events in quadrant A5,757,6902,051,524
Events in quadrant B5,334,2742,112,487
Events in quadrant C4,634,7401,433,401
Events in quadrant D2,622,356838,198

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03420890
B04075880
C05785920
D07692280

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01350
B01350
C01350
D01350

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A025000
B025000
C025020
D024990

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A12289458774.782170%
B1228121324810.787219%
C1228853906231.787444%
D1228077944964.694195%

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 456466 122774 0 0 0.00% 0.00%
B 456464 122615 0 0 0.00% 0.00%
C 456465 120764 0 0 0.00% 0.00%
D 456465 104517 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 14 188 6446 9.97 1530 1419 504.1
A 9 255 6054 9.19 1530 1419 504.1
A 14 204 5264 7.63 1530 1419 504.1
B 2 9 6033 14.23 1416 1342 329.6
B 2 8 5628 13.0 1416 1342 329.6
B 9 173 4504 9.59 1416 1342 329.6
C 2 31 3882 6.47 1248 1139 423.8
C 3 202 3643 5.91 1248 1139 423.8
C 7 221 3642 5.91 1248 1139 423.8
D 6 218 3351 10.58 754 671 253.2
D 15 11 2557 7.45 754 671 253.2
D 3 30 2469 7.1 754 671 253.2

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