ASTROSAT CZTI

Data Quality Report

Orbit 54935

Creation date: 2025-11-23T14:16:27.133263
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_014T01_9000006528_54935cztM0_level2.fits modeM0/AS1A14_014T01_9000006528_54935cztM0_level2_quad_clean.evt
Size (bytes)3,184,764,480465,261,120
Size3.0 GB 443.7 MB
Events in quadrant A39,097,3072,790,560
Events in quadrant B16,563,3783,409,944
Events in quadrant C27,745,2352,938,469
Events in quadrant D31,830,5372,580,160

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01404147
B0761096
C01066368
D01189496

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A06960
B06960
C06960
D06960

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0270
B0270
C0270
D0270

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A34446570416.559252%
B344476341.840509%
C3444617054.949776%
D34446420212.198804%

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 38424 34450 5025 5025 13.08% 14.59%
B 38425 34453 315 315 0.82% 0.91%
C 38425 34453 1476 1476 3.84% 4.28%
D 38425 34452 3981 3981 10.36% 11.56%

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 3 14 12786974 15370.46 3356 3272 831.7
A 3 45 10679328 12836.34 3356 3272 831.7
A 13 248 1115430 1337.2 3356 3272 831.7
B 5 185 1266621 1653.54 3556 3421 763.9
B 5 172 297156 384.5 3556 3421 763.9
B 4 81 214176 275.88 3556 3421 763.9
C 12 252 6347374 6687.62 3443 3416 948.6
C 1 16 1717327 1806.76 3443 3416 948.6
C 7 2 1340107 1409.1 3443 3416 948.6
D 2 249 6508792 6884.01 3305 3155 945.0
D 11 129 3337616 3528.39 3305 3155 945.0
D 6 239 1456904 1538.3 3305 3155 945.0

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