ASTROSAT CZTI

Data Quality Report

Orbit 51492

Creation date: 2025-04-05T17:36:04.217849
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/AS1A13_090T01_9000006458_51492cztM0_level2.fits modeM0/AS1A13_090T01_9000006458_51492cztM0_level2_quad_clean.evt
Size (bytes)2,102,987,520284,466,240
Size2.0 GB 271.3 MB
Events in quadrant A25,589,2781,662,823
Events in quadrant B11,377,8182,161,828
Events in quadrant C11,781,4631,923,883
Events in quadrant D27,426,6441,371,759

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0912634
B0492184
C0506964
D0968514

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0280
B0280
C0280
D0280

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A04380
B04380
C04380
D04380

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A21678348616.080819%
B216785132.366454%
C216795772.661562%
D21679460721.250980%

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 24269 21677 2643 2643 10.89% 12.19%
B 24270 21679 168 168 0.69% 0.77%
C 24271 21679 335 335 1.38% 1.55%
D 24271 21679 4573 4573 18.84% 21.09%

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 7080690 13049.94 2211 2153 542.4
A 12 250 3904609 7194.54 2211 2153 542.4
A 8 43 1152367 2120.52 2211 2153 542.4
B 0 213 341328 694.49 2300 2217 488.3
B 2 208 254449 516.56 2300 2217 488.3
B 0 171 215171 436.12 2300 2217 488.3
C 0 177 848033 1358.05 2274 2253 622.8
C 13 3 750906 1202.1 2274 2253 622.8
C 14 245 252429 401.7 2274 2253 622.8
D 8 176 13890061 23855.22 2099 2025 582.2
D 2 216 1496748 2567.46 2099 2025 582.2
D 7 60 1073558 1840.55 2099 2025 582.2

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