ASTROSAT CZTI

Data Quality Report

Orbit 39855

Creation date: 2024-06-27T22:09:30.527879
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/AS1A12_022T01_9000005498_39855cztM0_level2.fits modeM0/AS1A12_022T01_9000005498_39855cztM0_level2_quad_clean.evt
Size (bytes)468,486,72086,313,600
Size446.8 MB 82.3 MB
Events in quadrant A2,919,969612,768
Events in quadrant B5,636,496534,038
Events in quadrant C4,695,427557,559
Events in quadrant D3,672,636532,822

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0120253
B0204482
C0175382
D0146992

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0250
B0250
C0250
D0260

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01080
B01080
C01080
D01080

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A5378170.316103%
B537893317.348457%
C53782775.150614%
D53781182.194124%

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 7260 5379 11 11 0.15% 0.20%
B 7260 5379 813 813 11.20% 15.11%
C 7260 5379 261 261 3.60% 4.85%
D 7260 5379 101 101 1.39% 1.88%

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 10 83 493499 4104.51 590 578 120.1
A 13 248 107313 888.77 590 578 120.1
A 2 79 13202 105.12 590 578 120.1
B 4 170 3293954 30750.07 553 538 107.1
B 0 230 53038 490.18 553 538 107.1
B 5 32 32541 298.81 553 538 107.1
C 15 208 1324235 10112.41 561 564 130.9
C 9 187 855391 6530.6 561 564 130.9
C 15 214 225754 1720.38 561 564 130.9
D 1 52 364371 2609.81 570 553 139.4
D 12 227 254649 1822.73 570 553 139.4
D 7 38 216626 1549.98 570 553 139.4

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