ASTROSAT CZTI

Data Quality Report

Orbit 12499

Creation date: 2024-06-27T16:28:15.626701
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_174T01_9000001850_12499cztM0_level2.evt modeM0/AS1A04_174T01_9000001850_12499cztM0_level2_quad_clean.evt
Size (bytes)1,079,910,720182,975,040
Size1.0 GB 174.5 MB
Events in quadrant A7,239,5751,189,180
Events in quadrant B7,645,3921,196,236
Events in quadrant C5,910,9391,208,061
Events in quadrant D11,054,1901,073,068

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0297413
B0306012
C0258412
D0411762

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0120
B0120
C0120
D0120

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02600
B02600
C02600
D02600

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A126512051.620425%
B126513973.138092%
C12651880.695597%
D12651181714.362501%

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 13927 12652 6 6 0.04% 0.05%
B 13927 12653 179 179 1.29% 1.41%
C 13927 12654 6 6 0.04% 0.05%
D 13927 12653 1350 1350 9.69% 10.67%

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 1 162 355038 1125.08 1541 1511 314.2
A 1 178 208581 658.99 1541 1511 314.2
A 1 161 178511 563.3 1541 1511 314.2
B 4 239 1417276 4839.64 1533 1499 292.5
B 0 214 71950 240.83 1533 1499 292.5
B 3 209 53968 179.36 1533 1499 292.5
C 14 234 50288 140.23 1504 1517 347.8
C 13 61 10847 26.83 1504 1517 347.8
C 3 202 3619 6.04 1504 1517 347.8
D 1 52 5120024 15004.17 1398 1359 341.1
D 8 195 233688 681.02 1398 1359 341.1
D 2 14 189984 552.91 1398 1359 341.1

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