ASTROSAT CZTI

Data Quality Report

Orbit 51884

Creation date: 2025-05-02T02:13:36.547961
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_011T05_9000006466_51884cztM0_level2.fits modeM0/AS1C09_011T05_9000006466_51884cztM0_level2_quad_clean.evt
Size (bytes)760,878,72077,837,760
Size725.6 MB 74.2 MB
Events in quadrant A5,877,927567,062
Events in quadrant B5,245,440616,070
Events in quadrant C3,855,728560,281
Events in quadrant D12,704,183178,176

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01280
B01280
C01280
D01280

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0218431
B0198711
C0159151
D0419743

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A090
B090
C090
D090

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A62242584.145244%
B62253325.333333%
C62252043.277108%
D6224442971.160026%

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 7189 6225 168 168 2.34% 2.70%
B 7190 6226 222 222 3.09% 3.57%
C 7190 6226 130 130 1.81% 2.09%
D 7189 6223 3397 3397 47.25% 54.59%

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 12 3 1483052 9238.93 642 627 160.5
A 4 175 460329 2865.01 642 627 160.5
A 4 3 277873 1727.88 642 627 160.5
B 10 44 1114074 8166.89 644 621 136.3
B 4 170 334291 2447.38 644 621 136.3
B 10 254 282170 2065.09 644 621 136.3
C 1 60 316510 1792.55 638 634 176.2
C 14 245 240395 1360.61 638 634 176.2
C 13 3 199596 1129.08 638 634 176.2
D 11 129 6310923 57731.69 381 366 109.3
D 12 17 3074056 28119.44 381 366 109.3
D 8 176 649560 5939.11 381 366 109.3

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