ASTROSAT CZTI

Data Quality Report

Orbit 55499

Creation date: 2025-12-31T12:16:58.740772
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_099T01_9000006536_55499cztM0_level2.fits modeM0/AS1A14_099T01_9000006536_55499cztM0_level2_quad_clean.evt
Size (bytes)651,983,04084,533,760
Size621.8 MB 80.6 MB
Events in quadrant A3,502,203605,570
Events in quadrant B3,752,485643,034
Events in quadrant C4,561,742564,134
Events in quadrant D11,801,458282,671

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A080
B080
C080
D080

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01360
B01360
C01360
D01360

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A015392133
B016249133
C018669189
D040000436

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6658801.201562%
B66531562.344807%
C66582553.829979%
D6635351052.901281%

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 7526 6683 50 50 0.66% 0.75%
B 7515 6681 61 61 0.81% 0.91%
C 7503 6681 187 187 2.49% 2.80%
D 7493 6655 3160 3160 42.17% 47.48%

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 4 159 427937 2501.69 688 672 170.8
A 0 8 175000 1020.71 688 672 170.8
A 3 78 80367 466.62 688 672 170.8
B 5 172 939804 6326.96 680 654 148.4
B 4 67 49323 327.88 680 654 148.4
B 7 252 26033 170.98 680 654 148.4
C 9 38 1539347 8519.18 659 652 180.6
C 15 147 244705 1351.23 659 652 180.6
C 13 3 53755 294.01 659 652 180.6
D 7 70 8665383 59845.53 502 480 144.8
D 11 129 640637 4421.35 502 480 144.8
D 6 239 176794 1217.74 502 480 144.8

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