ASTROSAT CZTI

Data Quality Report

Orbit 15891

Creation date: 2024-06-27T17:14:48.870540
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/AS1A04_143T01_9000002344_15891cztM0_level2.evt modeM0/AS1A04_143T01_9000002344_15891cztM0_level2_quad_clean.evt
Size (bytes)2,533,464,000464,509,440
Size2.4 GB 443.0 MB
Events in quadrant A18,261,4492,928,836
Events in quadrant B18,630,1313,010,483
Events in quadrant C20,355,8392,831,460
Events in quadrant D17,059,1412,836,615

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A07360
B07360
C07360
D07360

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0779418
B0781387
C0833647
D0757267

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0580
B0580
C0580
D0580

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A358238012.235994%
B358235561.552075%
C3582312773.564749%
D358234151.158474%

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 41829 35826 229 229 0.55% 0.64%
B 41829 35825 19 19 0.05% 0.05%
C 41829 35826 443 443 1.06% 1.24%
D 41829 35827 51 51 0.12% 0.14%

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 15 239 1151664 1304.53 4390 4291 879.5
A 15 157 96290 104.6 4390 4291 879.5
A 7 16 66367 70.58 4390 4291 879.5
B 4 173 282909 335.65 4429 4313 830.0
B 4 216 271439 321.83 4429 4313 830.0
B 5 65 244178 288.99 4429 4313 830.0
C 9 236 2881034 2931.34 4222 4251 981.4
C 14 238 649542 657.53 4222 4251 981.4
C 3 233 265592 266.3 4222 4251 981.4
D 12 218 352394 333.89 4307 4194 1042.9
D 2 234 146554 136.51 4307 4194 1042.9
D 13 172 102505 94.27 4307 4194 1042.9

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