ASTROSAT CZTI

Data Quality Report

Orbit 35695

Creation date: 2022-05-10T14:54:33.223391
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/AS1A09_142T02_9000005112_35695cztM0_level2.evt modeM0/AS1A09_142T02_9000005112_35695cztM0_level2_quad_clean.evt
Size (bytes)826,312,320180,817,920
Size788.0 MB 172.4 MB
Events in quadrant A5,412,5521,211,205
Events in quadrant B6,317,6331,200,272
Events in quadrant C5,707,0071,193,723
Events in quadrant D6,852,7431,119,287

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02240
B02240
C02240
D02240

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0228546
B0254093
C0232093
D0274573

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0550
B0550
C0550
D0550

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A10861170.156523%
B108622332.145093%
C10862830.764132%
D108624644.271773%

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 16418 10865 1 1 0.01% 0.01%
B 16418 10865 182 182 1.11% 1.68%
C 16418 10865 65 65 0.40% 0.60%
D 16418 10865 437 437 2.66% 4.02%

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 83 258108 981.95 1318 1295 261.5
A 13 6 33468 123.02 1318 1295 261.5
A 15 169 13303 45.91 1318 1295 261.5
B 5 172 769801 3157.93 1289 1255 243.4
B 5 255 277958 1136.96 1289 1255 243.4
B 3 112 58337 234.55 1289 1255 243.4
C 15 214 448519 1515.61 1282 1294 295.1
C 0 10 247945 835.88 1282 1294 295.1
C 4 254 8766 25.32 1282 1294 295.1
D 8 230 643539 2086.76 1267 1236 307.8
D 12 6 462189 1497.58 1267 1236 307.8
D 13 249 286929 928.18 1267 1236 307.8

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