ASTROSAT CZTI

Data Quality Report

Orbit 51465

Creation date: 2025-04-03T21:30:17.849210
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/AS1A13_090T01_9000006458_51465cztM0_level2.fits modeM0/AS1A13_090T01_9000006458_51465cztM0_level2_quad_clean.evt
Size (bytes)742,953,60092,675,520
Size708.5 MB 88.4 MB
Events in quadrant A8,444,447577,879
Events in quadrant B5,085,528709,642
Events in quadrant C3,756,975638,665
Events in quadrant D9,692,232408,707

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0297612
B0196463
C0159802
D0334792

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0110
B0110
C0110
D0110

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01380
B01380
C01380
D01380

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6755129719.200592%
B67543164.678709%
C67541972.916790%
D6754240935.667752%

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 7845 6756 1155 1155 14.72% 17.10%
B 7844 6755 98 98 1.25% 1.45%
C 7844 6755 115 115 1.47% 1.70%
D 7844 6754 2034 2034 25.93% 30.12%

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 8 249 2324077 12952.41 731 716 179.4
A 4 175 1109026 6178.67 731 716 179.4
A 12 3 798273 4446.27 731 716 179.4
B 10 254 1239281 7781.67 746 720 159.2
B 4 206 390835 2451.03 746 720 159.2
B 8 234 57873 359.08 746 720 159.2
C 13 3 363705 1785.46 735 730 203.3
C 12 250 297623 1460.41 735 730 203.3
C 14 254 72923 355.12 735 730 203.3
D 8 176 3367158 19851.59 610 587 169.6
D 3 12 2680594 15803.14 610 587 169.6
D 15 94 417461 2458.17 610 587 169.6

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