ASTROSAT CZTI

Data Quality Report

Orbit 01836

Creation date: 2024-06-27T14:13:02.700649
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/AS1G02_021T08_9000000302_01836cztM0_level2.evt modeM0/AS1G02_021T08_9000000302_01836cztM0_level2_quad_clean.evt
Size (bytes)1,639,206,720131,618,880
Size1.5 GB 125.5 MB
Events in quadrant A12,191,893819,045
Events in quadrant B13,817,716820,009
Events in quadrant C11,815,516818,329
Events in quadrant D11,120,921799,125

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A010
B110
C1-1-1
D1-1-1

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0437322
B0485672
C04264723
D0405702

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02100
B02100
C02100
D02100

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A10540130.123340%
B105402852.703985%
C10536180.170843%
D10540420.398482%

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 12330 10542 262 262 2.12% 2.49%
B 12330 10542 970 970 7.87% 9.20%
C 12330 10540 261 261 2.12% 2.48%
D 12330 10542 212 212 1.72% 2.01%

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 2 8355 6.7 3187 3209 767.6
A -1 -1 -1 -1.0 3187 3209 767.6
A -1 -1 -1 -1.0 3187 3209 767.6
B 0 187 918597 1186.3 3293 3316 771.5
B 8 3 334077 428.7 3293 3316 771.5
B 0 234 25720 29.04 3293 3316 771.5
C 9 236 39183 42.97 3011 3121 839.2
C 14 223 16310 15.72 3011 3121 839.2
C 9 54 15357 14.58 3011 3121 839.2
D 1 83 168648 184.79 2892 2997 896.4
D 13 105 92840 100.22 2892 2997 896.4
D 7 85 25380 24.97 2892 2997 896.4

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